Merge pull request #1753 from lz4/fix_read_oob

Fix read oob

.circleci/config.yml

@@ -43,26 +43,21 @@ jobs:
     # Test
     #   This would typically be a build job when using workflows, possibly combined with build
     # This is based on your 1.0 configuration file or project settings
-    - run: CFLAGS= make clangtest && make clean
-    - run: g++ -v; make cxxtest   && make clean
-    - run: gcc -v; g++ -v; make ctocpptest && make clean
+    - run: CC=clang CFLAGS="-Werror -O0" make all && make clean
+    - run: c++ -v; make cxxtest V=1 && make clean
+    - run: cc -v; c++ -v; make ctocxxtest && make clean
     - run: gcc-5 -v; CC=gcc-5 CFLAGS="-O2 -Werror" make check && make clean
     - run: gcc-5 -v; CC=gcc-5 CFLAGS="-O2 -m32 -Werror" CPPFLAGS=-I/usr/include/x86_64-linux-gnu make check && make clean
-    - run: gcc-6 -v; CC=gcc-6 MOREFLAGS="-O2 -Werror" make check  && make clean
-    - run: make cmake               && make clean
+    - run: gcc-6 -v; CC=gcc-6 CFLAGS="-O2 -Werror" make check  && make clean
+    - run: make cmakebuild           && make clean
     - run: make -C tests test-lz4
     - run: make -C tests test-lz4c
     - run: make -C tests test-frametest
     - run: make -C tests test-fuzzer && make clean
-    - run: make -C lib all          && make clean
-    - run: pyenv global 3.4.4; make versionsTest MOREFLAGS=-I/usr/include/x86_64-linux-gnu && make clean
-    - run: make travis-install      && make clean
+    - run: make -C lib all           && make clean
+    - run: pyenv global 3.14; CPPFLAGS=-I/usr/include/x86_64-linux-gnu make versionsTest && make clean
+    - run: make test-install         && make clean
     - run: gcc -v; CFLAGS="-O2 -m32 -Werror" CPPFLAGS=-I/usr/include/x86_64-linux-gnu make check && make clean
-    - run: clang -v; make staticAnalyze && make clean
-    - run: make platformTest CC=powerpc-linux-gnu-gcc QEMU_SYS=qemu-ppc-static                  && make clean
-    - run: make platformTest CC=powerpc-linux-gnu-gcc QEMU_SYS=qemu-ppc64-static MOREFLAGS=-m64 && make clean
-    - run: make platformTest CC=arm-linux-gnueabi-gcc QEMU_SYS=qemu-arm-static                  && make clean
-    - run: make platformTest CC=aarch64-linux-gnu-gcc QEMU_SYS=qemu-aarch64-static              && make clean
     # Teardown
     #   If you break your build into multiple jobs with workflows, you will probably want to do the parts of this that are relevant in each
     # Save test results

.cirrus.yml

@@ -1,5 +0,0 @@
-freebsd_instance:
-  image_family: freebsd-12-2
-
-task:
-  script: pkg install -y gmake && gmake test

.clang-format

@@ -0,0 +1,132 @@
+# This is the configuration file for clang-format, an automatic code formatter.
+# Introduction: https://clang.llvm.org/docs/ClangFormat.html
+# Supported options: https://clang.llvm.org/docs/ClangFormatStyleOptions.html
+
+Language: Cpp
+Standard: Latest
+
+ColumnLimit: 110
+
+UseTab: Never
+IndentWidth: 4
+PPIndentWidth: 2
+ContinuationIndentWidth: 4
+
+LineEnding: LF
+InsertNewlineAtEOF: true
+KeepEmptyLinesAtTheStartOfBlocks: false
+MaxEmptyLinesToKeep: 1
+
+IndentCaseBlocks: false
+IndentCaseLabels: false
+IndentGotoLabels: false
+IndentPPDirectives: AfterHash
+IndentWrappedFunctionNames: false
+
+AlignAfterOpenBracket: Align
+AlignArrayOfStructures: Right
+AlignEscapedNewlines: Left
+AlignOperands: Align
+AlignConsecutiveAssignments:
+    Enabled:          true
+    AcrossEmptyLines: false
+    AcrossComments:   false
+    AlignCompound:    false
+    PadOperators:     false
+AlignConsecutiveBitFields:
+    Enabled:          true
+    AcrossEmptyLines: false
+    AcrossComments:   false
+AlignConsecutiveDeclarations:
+    Enabled:          true
+    AcrossEmptyLines: false
+    AcrossComments:   false
+AlignConsecutiveMacros:
+    Enabled:          true
+    AcrossEmptyLines: false
+    AcrossComments:   false
+AlignTrailingComments:
+    Kind:           Leave
+    OverEmptyLines: 0
+
+BinPackArguments: true
+BinPackParameters: false
+AllowAllArgumentsOnNextLine: true
+AllowAllParametersOfDeclarationOnNextLine: false
+
+AllowShortBlocksOnASingleLine: Never
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortEnumsOnASingleLine: true
+AllowShortFunctionsOnASingleLine: None
+AllowShortIfStatementsOnASingleLine: AllIfsAndElse
+AllowShortLoopsOnASingleLine: false
+
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+BraceWrapping:
+    AfterCaseLabel:        false
+    AfterControlStatement: Never
+    AfterEnum:             false
+    AfterExternBlock:      false
+    AfterFunction:         true
+    AfterStruct:           false
+    AfterUnion:            false
+    BeforeElse:            false
+    BeforeWhile:           false
+    IndentBraces:          false
+    SplitEmptyFunction:    false
+    SplitEmptyRecord:      false
+BreakAfterAttributes: Never
+BreakBeforeBinaryOperators: None
+BreakBeforeBraces: Custom
+BreakBeforeInlineASMColon: OnlyMultiline
+BreakBeforeTernaryOperators: true
+
+DerivePointerAlignment: false
+PointerAlignment: Left
+
+QualifierAlignment: Custom
+QualifierOrder: ["inline", "static", "volatile", "restrict", "const", "type"]
+
+ReflowComments: false
+BreakStringLiterals: false
+RemoveSemicolon: true
+RemoveParentheses: ReturnStatement
+InsertBraces: false
+SeparateDefinitionBlocks: Always
+
+SpaceAfterCStyleCast: false
+SpaceAfterLogicalNot: false
+SpaceAroundPointerQualifiers: Default
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeCaseColon: false
+SpaceBeforeParens: ControlStatements
+BitFieldColonSpacing: Both
+SpaceBeforeSquareBrackets: false
+SpaceInEmptyBlock: false
+SpacesBeforeTrailingComments: 1
+SpacesInSquareBrackets: false
+SpacesInLineCommentPrefix:
+    Minimum: 1
+    Maximum: -1
+
+SortIncludes: Never
+IncludeBlocks: Preserve
+IncludeIsMainRegex: ""
+IncludeCategories:
+    - {Regex: "<.*>",   Priority: -2, CaseSensitive: true}
+    - {Regex: "\".*\"", Priority: -1, CaseSensitive: true}
+
+AttributeMacros: ["__capability"]
+StatementAttributeLikeMacros: []
+StatementMacros: []
+
+PenaltyBreakAssignment: 200
+PenaltyBreakBeforeFirstCallParameter: 19
+PenaltyBreakComment: 300
+PenaltyBreakFirstLessLess: 120
+PenaltyBreakOpenParenthesis: 0
+PenaltyBreakString: 1000
+PenaltyExcessCharacter: 10
+PenaltyIndentedWhitespace: 0
+PenaltyReturnTypeOnItsOwnLine: 60

.github/dependabot.yaml

@@ -0,0 +1,7 @@
+version: 2
+
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: monthly

.github/workflows/README.md

@@ -1,61 +1,56 @@
 This directory contains [GitHub Actions](https://github.com/features/actions) workflow files.
 
+# Workflow Organization
+
+The CI/CD workflows are organized into focused, maintainable files:
+
+## Core Testing Workflows
+- **`compilers.yml`** - Tests compatibility across different C compilers (GCC, Clang versions)
+- **`core-tests.yml`** - Core LZ4 functionality testing (benchmarks, fuzzing, frame format, ABI compatibility, etc.)
+- **`sanitizers.yml`** - Memory safety testing (AddressSanitizer, MemorySanitizer, UBSan, ThreadSanitizer)
+
+## Platform & Build System Testing
+- **`cross-platform.yml`** - Cross-platform testing using QEMU emulation and native macOS builds
+- **`build-systems.yml`** - Alternative build systems (Visual Studio, Meson)
+- **`cmake-test.yml`** - CMake build system testing
+
+## Code Quality & Analysis
+- **`code-quality.yml`** - Static analysis tools (cppcheck, scan-build, valgrind, unicode lint)
+- **`oss-fuzz.yml`** - OSS-Fuzz integration for continuous fuzzing
+
+## Utilities & Environment
+- **`release-environment.yml`** - Release validation and environment information gathering
+- **`scorecard.yml`** - Security scorecard analysis
+
+This organization provides:
+- **Better maintainability** - Changes to specific test categories only affect relevant files
+- **Improved parallelization** - Workflows run independently and in parallel
+- **Clearer failure isolation** - Easier to identify which types of tests are failing
+- **Enhanced readability** - Each workflow has a single, clear responsibility
+
 # Known issues
 
-## USAN, ASAN (`lz4-ubsan-x64`, `lz4-ubsan-x86`, `lz4-asan-x64`)
+## Sanitizers (UBSan, ASan) - `sanitizers.yml`
 
-For now, `lz4-ubsan-*` ignores the exit code of `make usan` and `make usan32`.
-Because there are several issues which may take relatively long time to resolve.
-
-We'll fully enable it when we ensure `make usan` is ready for all commits and PRs.
-
-See [#983](https://github.com/lz4/lz4/pull/983) for details.
+### UBSan (UndefinedBehaviorSanitizer)
+For now, UBSan tests use the `-fsanitize-recover=pointer-overflow` flag:
+there are known cases of pointer overflow arithmetic within `lz4.c` fast compression.
+These cases are not dangerous with known architecture,
+but they are not guaranteed to work by the C standard,
+which means that, in some future, some new architecture or some new compiler
+may decide to do something funny that could break this behavior.
+Hence, in anticipation, it's better to remove them.
+This has been already achieved in `lz4hc.c`.
+However, the same attempt in `lz4.c` resulted in massive speed losses,
+which is not an acceptable cost for preemptively solving a "potential future" problem
+not active anywhere today.
+Therefore, a more acceptable work-around will have to be found first.
 
 
-## C Compilers (`lz4-c-compilers`)
-
-- Our test doesn't use `gcc-4.5` due to installation issue of its package.  (`apt-get install gcc-4.5` fails on GH-Actions VM)
-
-- Currently, the following 32bit executable tests fail with all versions of `clang`.
-  - `CC=clang-X CFLAGS='-O3' make V=1 -C tests clean test-lz4c32`
-  - `CC=clang-X CFLAGS='-O3 -mx32' make V=1 -C tests clean test-lz4c32`
-  - See [#991](https://github.com/lz4/lz4/issues/991) for details.
-
-- Currently, the following 32bit executable tests fail with `gcc-11`
-  - `CC=gcc-11 CFLAGS='-O3' make V=1 -C tests clean test-lz4c32`
-  - `CC=gcc-11 CFLAGS='-O3 -mx32' make V=1 -C tests clean test-lz4c32`
-  - See [#991](https://github.com/lz4/lz4/issues/991) for details.
-
-
-## cppcheck (`lz4-cppcheck`)
+## cppcheck - `code-quality.yml`
 
 This test script ignores the exit code of `make cppcheck`.
 Because this project doesn't 100% follow their recommendation.
 Also sometimes it reports false positives.
 
 
-
-# Notes
-
-- You can investigate various information at the right pane of GitHub
-  Actions report page.
-
-| Item                      | Section in the right pane             |
-| ------------------------- | ------------------------------------- |
-| OS, VM                    | Set up job                            |
-| git repo, commit hash     | Run actions/checkout@v2               |
-| Version of tools          | Environment info                      |
-
-
-
-# Difference with `.travis.yml`
-
-The following tests are not included yet.
-
-- name: Compile OSS-Fuzz targets
-
-The following tests will not be included due to limitation of GH-Actions.
-
-- name: aarch64 real-hw tests
-- name: PPC64LE real-hw tests
-- name: IBM s390x real-hw tests

.github/workflows/build-systems.yml

@@ -0,0 +1,109 @@
+# Build system testing (Visual Studio, Meson)
+name: Build Systems
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  windows-visual-studio:
+    name: ${{ matrix.system.os }} Visual Studio
+    runs-on: ${{ matrix.system.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        system:
+          - { os: windows-2022, build_path: ".\\build\\VS2022" }
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Build Win32 Debug
+      # Switching to debug mode, since vs2022 optimizations seem to introduce a bug since July 2024
+      run: |
+        pushd ${{ matrix.system.build_path }}
+        .\\build-and-test-win32-debug.bat
+        popd
+
+    - name: Build x64 Debug
+      # Switching to debug mode, since vs2022 optimizations seem to introduce a bug since July 2024
+      run: |
+        pushd ${{ matrix.system.build_path }}
+        .\\build-and-test-x64-debug.bat
+        popd
+
+    - name: Generate VS solution
+      run: |
+        pushd ".\\build\\visual"
+        .\\generate_vs2022.cmd
+        popd
+
+    - name: Upload generated VS2022 directory
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+      with:
+        name: VS2022-Build-Dir
+        path: "build/visual/Visual Studio 17 2022"
+
+    - name: Build executable with generated solution
+      run: cmake --build "build/visual/Visual Studio 17 2022" --config Debug
+
+    - name: Run minimal runtime test
+      run: |
+        & ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe" -vvV
+        & ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe" -bi1
+        & ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe" ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe"
+        & ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe" -t ".\\build\\visual\\Visual Studio 17 2022\\Debug\\lz4.exe.lz4"
+
+  meson:
+    name: Meson + Ninja
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Setup Python
+      uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
+      with:
+        python-version: '3.x'
+
+    - name: Install build tools
+      run: |
+        sudo apt-get update
+        sudo apt-get install tree ninja-build
+        python -m pip install --upgrade pip
+        pip3 install --user meson
+
+    - name: Display environment info
+      run: |
+        type clang && which clang && clang --version
+        type python && which python && python --version
+        type meson && which meson && meson --version
+
+    - name: Configure build
+      run: >
+        meson setup
+        --fatal-meson-warnings
+        --buildtype=debug
+        -Db_lundef=false
+        -Dauto_features=enabled
+        -Dprograms=true
+        -Dcontrib=true
+        -Dtests=true
+        -Dexamples=true
+        build/meson builddir
+
+    - name: Run tests
+      run: meson test -C builddir
+
+    - name: Test installation
+      run: |
+        cd builddir
+        DESTDIR=./staging ninja install
+        tree ./staging

.github/workflows/ci.yml

@@ -1,800 +0,0 @@
-# For details, see README.md in this directory.
-
-###############################################################
-# C compilers
-#
-# - gcc
-# - clang
-#
-# Known Issue
-# - All test cases which described as 'fail' must be fixed and replaced with 'true'.
-#   - gcc-11 (x32, x86) : "../lib/lz4hc.c:148: LZ4HC_countBack: Assertion `(size_t)(match - mMin) < (1U<<31)' failed."
-#   - all clangs (x32, x86) : "../lib/lz4hc.c:282: int LZ4HC_InsertAndGetWiderMatch(...): Assertion `matchPtr >= lowPrefixPtr' failed."
-#
-name: lz4 CI
-on: [push, pull_request]
-permissions:
-  contents: read
-
-jobs:
-  lz4-c-compilers:
-    name: CC=${{ matrix.cc }}, ${{ matrix.os }}
-    strategy:
-      fail-fast: false  # 'false' means Don't stop matrix workflows even if some matrix failed.
-      matrix:
-        include: [
-          # You can access the following values via ${{ matrix.??? }}
-          #
-          #   pkgs         : apt-get package names.  It can include multiple package names which are delimited by space.
-          #   cc           : C compiler executable.
-          #   cxx          : C++ compiler executable for `make ctocpptest`.
-          #   x32          : Set 'true' if compiler supports x32.  Otherwise, set 'false'.
-          #                  Set 'fail' if it supports x32 but fails for now.  'fail' cases must be removed.
-          #   x86          : Set 'true' if compiler supports x86 (-m32).  Otherwise, set 'false'.
-          #                  Set 'fail' if it supports x86 but fails for now.  'fail' cases must be removed.
-          #   cxxtest      : Set 'true' if it can be compiled as C++ code.  Otherwise, set 'false'.
-          #   freestanding : Set 'true' if it can be compiled and execute freestanding code.  Otherwise, set 'false'.
-          #                  Usually, it requires Linux, x86_64 and gcc/g++.
-          #   os           : GitHub Actions YAML workflow label.  See https://github.com/actions/virtual-environments#available-environments
-
-          # cc
-          { pkgs: '',                                                   cc: cc,        cxx: c++,         x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-latest, },
-
-          # gcc
-          { pkgs: '',                                                   cc: gcc,       cxx: g++,         x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-latest, },
-          { pkgs: 'gcc-12 g++-12 lib32gcc-12-dev libx32gcc-12-dev',     cc: gcc-12,    cxx: g++-12,      x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-22.04,  },
-          { pkgs: 'gcc-11 g++-11 lib32gcc-11-dev libx32gcc-11-dev',     cc: gcc-11,    cxx: g++-11,      x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-22.04,  },
-          { pkgs: 'gcc-10 g++-10 lib32gcc-10-dev libx32gcc-10-dev',     cc: gcc-10,    cxx: g++-10,      x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-22.04,  },
-          { pkgs: 'gcc-9 g++-9 lib32gcc-9-dev libx32gcc-9-dev',         cc: gcc-9,     cxx: g++-9,       x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-22.04,  },
-          { pkgs: 'gcc-8 g++-8 lib32gcc-8-dev libx32gcc-8-dev',         cc: gcc-8,     cxx: g++-8,       x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-20.04,  },
-          { pkgs: 'gcc-7 g++-7 lib32gcc-7-dev libx32gcc-7-dev',         cc: gcc-7,     cxx: g++-7,       x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-20.04,  },
-          { pkgs: 'gcc-6 g++-6 lib32gcc-6-dev libx32gcc-6-dev',         cc: gcc-6,     cxx: g++-6,       x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-18.04,  },
-          { pkgs: 'gcc-5 g++-5 lib32gcc-5-dev libx32gcc-5-dev',         cc: gcc-5,     cxx: g++-5,       x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-18.04,  },
-          { pkgs: 'gcc-4.8 g++-4.8 lib32gcc-4.8-dev libx32gcc-4.8-dev', cc: gcc-4.8,   cxx: g++-4.8,     x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'true',  os: ubuntu-18.04,  },
-
-          # clang
-          { pkgs: 'lib32gcc-11-dev libx32gcc-11-dev',                   cc: clang,     cxx: clang++,     x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-latest, },
-          { pkgs: 'clang-14  lib32gcc-11-dev libx32gcc-11-dev',         cc: clang-14,  cxx: clang++-14,  x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-22.04,  },
-          { pkgs: 'clang-13  lib32gcc-11-dev libx32gcc-11-dev',         cc: clang-13,  cxx: clang++-13,  x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-22.04,  },
-          { pkgs: 'clang-12  lib32gcc-11-dev libx32gcc-11-dev',         cc: clang-12,  cxx: clang++-12,  x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-22.04,  },
-          { pkgs: 'clang-11  lib32gcc-11-dev libx32gcc-11-dev',         cc: clang-11,  cxx: clang++-11,  x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-22.04,  },
-          { pkgs: 'clang-10  lib32gcc-11-dev libx32gcc-11-dev',         cc: clang-10,  cxx: clang++-10,  x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-20.04,  },
-          { pkgs: 'clang-9   lib32gcc-11-dev libx32gcc-11-dev',         cc: clang-9,   cxx: clang++-9,   x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-20.04,  },
-          { pkgs: 'clang-8   lib32gcc-11-dev libx32gcc-11-dev',         cc: clang-8,   cxx: clang++-8,   x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-20.04,  },
-          { pkgs: 'clang-7   lib32gcc-7-dev  libx32gcc-7-dev',          cc: clang-7,   cxx: clang++-7,   x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-20.04,  },
-          { pkgs: 'clang-6.0 lib32gcc-11-dev libx32gcc-11-dev',         cc: clang-6.0, cxx: clang++-6.0, x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-20.04,  },
-          { pkgs: 'clang-5.0 lib32gcc-11-dev libx32gcc-11-dev',         cc: clang-5.0, cxx: clang++-5.0, x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-18.04,  },
-          { pkgs: 'clang-4.0 lib32gcc-11-dev libx32gcc-11-dev',         cc: clang-4.0, cxx: clang++-4.0, x32: 'true', x86: 'true', cxxtest: 'true',  freestanding: 'false', os: ubuntu-18.04,  },
-          { pkgs: 'clang-3.9',                                          cc: clang-3.9, cxx: clang++-3.9, x32: 'fail', x86: 'fail', cxxtest: 'false', freestanding: 'false', os: ubuntu-18.04,  },
-        ]
-
-    runs-on: ${{ matrix.os }}
-    env:                        # Set environment variables
-      # We globally set CC and CXX to improve compatibility with .travis.yml
-      CC: ${{ matrix.cc }}
-      CXX: ${{ matrix.cxx }}
-      FIXME__LZ4_CI_IGNORE : ' echo Error.  But we ignore it for now.'
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install gcc-multilib
-        sudo apt-get install ${{ matrix.pkgs }}
-
-    - name: Environment info
-      run: |
-        echo && type $CC && which $CC && $CC --version
-        echo && type $CXX && which $CXX && $CXX --version
-
-    - name: make
-      if: always()
-      run: make V=1
-
-    - name: install test
-      if: always()
-      run: make clean; make V=1 -C tests test-install
-
-    - name: make all
-      if: always()
-      run: make V=1 clean all
-
-    - name: make c_standards (C90)
-      if: always()
-      run: make V=1 clean c_standards_c90
-
-    - name: make c_standards (C11)
-      if: always()
-      run: make V=1 clean c_standards_c11
-
-    - name: make c-to-c++
-      if: always()
-      run: make V=1 clean ctocpptest
-
-    - name: make cxxtest
-      if: ${{ matrix.cxxtest == 'true' }}
-      run: make V=1 clean cxxtest
-
-    - name: make test-freestanding
-      if: ${{ matrix.freestanding == 'true' }}
-      run: make V=1 clean test-freestanding
-
-    - name: make -C programs default
-      if: always()
-      run: make V=1 -C programs clean default
-
-    - name: make -C programs default -D_FORTIFY_SOURCE=2
-      if: always()
-      run: CFLAGS='-fPIC' LDFLAGS='-pie -fPIE -D_FORTIFY_SOURCE=2' make V=1 -C programs clean default
-
-    - name: make -C tests test-lz4
-      if: always()
-      run: make clean; MOREFLAGS='-Werror' make -j V=1 -C tests test-lz4
-
-    - name: make clangtest (clang only)
-      if: ${{ startsWith( matrix.cc , 'clang' ) }}
-      run: make V=1 clean clangtest
-
-    - name: make -C tests test MOREFLAGS='-mx32'
-      if: ${{ matrix.x32 == 'true' }}
-      run: make clean; LDFLAGS='-Wl,--verbose' MOREFLAGS='-mx32' make -j V=1 -C tests test
-
-    - name: make -C tests test-lz4c32
-      if: ${{ matrix.x86 == 'true' }}
-      run: LDFLAGS='-Wl,--verbose' MOREFLAGS='-Werror' make V=1 -C tests clean test-lz4c32
-
-
-    ###############################################################
-    #                                                             #
-    #      Remove this block when we stabilize the tests.         #
-    #                                                             #
-
-    - name: make -C tests test MOREFLAGS='-mx32' || echo Ignore failure for now.
-      if: ${{ matrix.x32 == 'fail' }}
-      run: make clean; LDFLAGS='-Wl,--verbose' MOREFLAGS='-mx32' make -j V=1 -C tests test || $FIXME__LZ4_CI_IGNORE
-
-    - name: make -C tests test-lz4c32 || echo Ignore failure for now.
-      if: ${{ matrix.x86 == 'fail' }}
-      run: make clean; LDFLAGS='-Wl,--verbose' MOREFLAGS='-Werror' make V=1 -C tests test-lz4c32 || $FIXME__LZ4_CI_IGNORE
-
-    #                                                             #
-    ###############################################################
-
-
-
-###############################################################
-# LZ4 self tests
-#
-# - Benchmark
-# - Fuzzer
-# - LZ4 Frame
-# - LZ4 versions
-# - Custom LZ4_DISTANCE_MAX
-#
-  lz4-benchmark:
-    name: Benchmark
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install gcc-multilib
-
-    - name: benchmark (-C tests test-lz4)
-      run: make -j V=1 -C tests test-lz4
-
-    - name: benchmark (-C tests test-lz4c)
-      run: make -j V=1 -C tests test-lz4c
-
-    - name: benchmark (-C tests test-lz4c32)
-      run: make V=1 -C tests test-lz4c32
-
-    - name: benchmark (-C tests test-fullbench)
-      run: make V=1 -C tests test-fullbench
-
-    - name: benchmark (-C tests test-fullbench32)
-      run: make V=1 -C tests test-fullbench32
-
-
-  lz4-fuzzer:
-    name: Fuzzer test
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install gcc-multilib
-
-    - name: setup
-      run: sudo sysctl -w vm.mmap_min_addr=4096
-
-    - name: fuzzer
-      run: make V=1 -C tests test-fuzzer
-
-    - name: fuzzer32
-      run: make V=1 -C tests test-fuzzer32
-
-
-  lz4-standard-makefile-variables:
-    name: LZ4 Makefile - support for standard variables
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-
-    - name: make standard_variables
-      run: make V=1 standard_variables
-
-
-  lz4-versions:
-    name: LZ4 versions test
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install gcc-multilib
-
-    - name: make -C tests versionsTest
-      run: make V=1 -C tests versionsTest
-
-
-  lz4-abi:
-    name: LZ4 inter-versions ABI test
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install gcc-multilib
-
-    - name: make -C tests abiTests
-      run: make V=1 -C tests abiTests
-
-
-  lz4-frame:
-    name: LZ4 frame test
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install gcc-multilib
-
-    - name: LZ4 frame test
-      run: make V=1 -C tests test-frametest
-
-    - name: LZ4 frame test (32-bit)
-      run: make V=1 -C tests test-frametest32
-
-  lz4-memory-usage:
-    name: test different values of LZ4_MEMORY_USAGE
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-    - name: LZ4_MEMORY_USAGE
-      run: make V=1 -C tests test-compile-with-lz4-memory-usage
-
-  # Custom LZ4_DISTANCE_MAX ; lz4-wlib (CLI linked to dynamic library); LZ4_USER_MEMORY_FUNCTIONS
-  lz4-custom-distance:
-    name: Custom LZ4_DISTANCE_MAX
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-    - name: custom LZ4_DISTANCE_MAX; test LZ4_USER_MEMORY_FUNCTIONS
-      run: |
-        MOREFLAGS='-DLZ4_DISTANCE_MAX=8000' make V=1 check
-        make V=1 clean
-        make V=1 -C programs lz4-wlib
-        make V=1 clean
-        make V=1 -C tests fullbench-wmalloc  # test LZ4_USER_MEMORY_FUNCTIONS
-        make V=1 clean
-        CC="c++ -Wno-deprecated" make V=1 -C tests fullbench-wmalloc  # stricter function signature check
-
-  # test block device compression #1086
-  lz4cli-block-device:
-    name: Test lz4 compression on a block device
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-    - name: create a block device, compress it with lz4 # alternative : blindly use /dev/loop0, seems to always exist
-      run: |
-        make lz4
-        dd if=/dev/zero of=full0.img bs=2M count=1
-        BLOCK_DEVICE=$(sudo losetup --show -fP full0.img)
-        sudo chmod 666 $BLOCK_DEVICE
-        ./lz4 -v $BLOCK_DEVICE -c > /dev/null
-        sudo losetup -d $BLOCK_DEVICE
-        rm full0.img
-
-
-###############################################################
-# Check tools
-#
-# - cppcheck
-# - scan-build
-# - valgrind
-# - ubsan
-# - asan
-# - unicode-lint
-# - build examples
-#
-  lz4-cppcheck:
-    name: make cppcheck
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install cppcheck
-
-    - name: Environment info
-      run: echo && type cppcheck && which cppcheck && cppcheck --version
-
-    - name: cppcheck
-      # This test script ignores the exit code of cppcheck.
-      # See known issues in README.md.
-      run: make V=1 clean cppcheck || echo There are some cppcheck reports but we ignore it.
-
-
-  lz4-scan-build:
-    name: make staticAnalyze
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install clang-tools
-
-    - name: Environment info
-      run: |
-        echo && type gcc && which gcc && gcc --version
-        echo && type clang && which clang && clang --version
-        echo && type scan-build && which scan-build               # scan-build doesn't have any --version equivalent option
-        echo && type make && which make && make -v
-        echo && cat /proc/cpuinfo || echo /proc/cpuinfo is not present
-
-    - name: make staticAnalyze
-      run: make V=1 clean staticAnalyze
-
-
-  lz4-valgrind:
-    name: valgrind
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install valgrind
-
-    - name: Environment info
-      run: |
-        echo && type cc && which cc && cc --version
-        echo && type valgrind && which valgrind && valgrind --version
-
-    - name: valgrind
-      run: make V=1 -C tests test-mem
-
-
-  lz4-ubsan-x64:
-    name: Linux x64 ubsan
-    runs-on: ubuntu-latest
-    env:                        # Set environment variables
-      FIXME__LZ4_CI_IGNORE : ' echo Error.  But we ignore it for now.'
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-
-    - name: ubsan
-      #########################################################
-      # For now, we ignore the exit code of `make usan`.
-      # See "Known issues / lz4-ubsan-x64" in README.md
-      # When we'll resolve this issue, remove "|| $FIXME__LZ4_CI_IGNORE"
-      #########################################################
-      run: make V=1 clean usan MOREFLAGS='-Wcomma -Werror' || $FIXME__LZ4_CI_IGNORE
-
-
-  lz4-ubsan-x86:
-    name: Linux x86 ubsan
-    runs-on: ubuntu-latest
-    env:                        # Set environment variables
-      FIXME__LZ4_CI_IGNORE : ' echo Error.  But we ignore it for now.'
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install gcc-multilib
-        sudo apt-get install lib32gcc-11-dev
-
-    - name: ubsan32
-      #########################################################
-      # For now, we ignore the exit code of `make usan32`.
-      # See "Known issues / lz4-ubsaan-x86" in README.md.
-      # When we'll resolve this issue, remove "|| $FIXME__LZ4_CI_IGNORE"
-      #########################################################
-      run: CC=clang make V=1 clean usan32 MOREFLAGS='-Wcomma -Werror' || $FIXME__LZ4_CI_IGNORE
-
-
-  lz4-asan-x64:
-    name: Linux x64 ASAN
-    runs-on: ubuntu-latest
-    env:                        # Set environment variables
-      FIXME__LZ4_CI_IGNORE : ' echo Error.  But we ignore it for now.'
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-
-    - name: setup
-      run: sudo sysctl -w vm.mmap_min_addr=4096
-
-    - name: frametest
-      run: CC=clang MOREFLAGS=-fsanitize=address make V=1 -C tests clean test-frametest
-
-    - name: fuzzer
-      run: CC=clang MOREFLAGS=-fsanitize=address make V=1 -C tests clean test-fuzzer
-
-  unicode-lint:
-    name: lint unicode in ./lib/, ./tests/ and ./programs/
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-    - name: unicode lint
-      run: bash ./tests/unicode_lint.sh
-
-  lz4-examples:
-    name: make examples
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-
-    - name: Environment info
-      run: |
-        echo && type cc && which cc && cc --version
-        echo && type c++ && which c++ && c++ --version
-
-    - name: examples
-      run: make V=1 clean examples
-
-    - name: examples (compile as C++ code)
-      run: make V=1 -C examples clean cxxtest
-
-  # lasts ~20mn
-  oss-fuzz:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        sanitizer: [address, undefined, memory]
-    steps:
-    - name: Build Fuzzers (${{ matrix.sanitizer }})
-      id: build
-      uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
-      with:
-        oss-fuzz-project-name: 'lz4'
-        dry-run: false
-        sanitizer: ${{ matrix.sanitizer }}
-    - name: Run Fuzzers (${{ matrix.sanitizer }})
-      uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
-      with:
-        oss-fuzz-project-name: 'lz4'
-        fuzz-seconds: 600
-        dry-run: false
-        sanitizer: ${{ matrix.sanitizer }}
-    - name: Upload Crash
-      uses: actions/upload-artifact@v1
-      if: failure() && steps.build.outcome == 'success'
-      with:
-        name: ${{ matrix.sanitizer }}-artifacts
-        path: ./out/artifacts
-
-
-
-###############################################################
-# Platforms
-#
-# - QEMU (ARM, ARM64, PPC, PPC64LE, S390X)
-# - macOS
-#
-
-  # QEMU
-  # All tests use QEMU (static) and gcc cross compiler.
-  #
-  # note:
-  #   We don't employ completely matrix method which provides `MOREFLAGS`
-  #   etc in the matrix.  Because some platform may need its special
-  #   compiler options and test.
-  #   For example, xxHash already has tests for scalar and SIMD version of
-  #   it.  But compiler options are quite different between platforms.
-  #
-  #   So, please keep them simple and independent.
-  #
-  lz4-qemu-platforms:
-    name: QEMU ${{ matrix.type }}
-    strategy:
-      fail-fast: false  # 'false' means Don't stop matrix workflows even if some matrix instance failed.
-      matrix:
-        include: [
-          # You can access the following values via ${{ matrix.??? }}
-          #   type : Architecture type for `if:` statement.
-          #   pkgs : apt-get package names.  You can include multiple packages which are delimited by space.
-          #   xcc  : gcc cross C compiler executable.
-          #   xemu : QEMU static emulator executable.
-          #   os   : GitHub Actions YAML workflow label.  See https://github.com/actions/virtual-environments#available-environments
-
-          { type: ARM,      pkgs: 'qemu-system-arm   gcc-arm-linux-gnueabi',     xcc: arm-linux-gnueabi-gcc,     xemu: qemu-arm-static,     os: ubuntu-latest, },
-          { type: ARM64,    pkgs: 'qemu-system-arm   gcc-aarch64-linux-gnu',     xcc: aarch64-linux-gnu-gcc,     xemu: qemu-aarch64-static, os: ubuntu-latest, },
-          { type: PPC,      pkgs: 'qemu-system-ppc   gcc-powerpc-linux-gnu',     xcc: powerpc-linux-gnu-gcc,     xemu: qemu-ppc-static,     os: ubuntu-latest, },
-          { type: PPC64LE,  pkgs: 'qemu-system-ppc   gcc-powerpc64le-linux-gnu', xcc: powerpc64le-linux-gnu-gcc, xemu: qemu-ppc64le-static, os: ubuntu-latest, },
-          { type: S390X,    pkgs: 'qemu-system-s390x gcc-s390x-linux-gnu',       xcc: s390x-linux-gnu-gcc,       xemu: qemu-s390x-static,   os: ubuntu-latest, },
-        ]
-
-    runs-on: ${{ matrix.os }}
-    env:                        # Set environment variables
-      XCC: ${{ matrix.xcc }}
-      XEMU: ${{ matrix.xemu }}
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-
-    - name: apt-get install
-      run: |
-        sudo apt-get update
-        sudo apt-get install gcc-multilib
-        sudo apt-get install qemu-utils qemu-user-static
-        sudo apt-get install ${{ matrix.pkgs }}
-
-    - name: Environment info
-      run: |
-        echo && type $XCC && which $XCC && $XCC --version
-        echo && $XCC -v                       # Show built-in specs
-        echo && type $XEMU && which $XEMU && $XEMU --version
-
-    - name: ARM64
-      if: ${{ matrix.type == 'ARM64' }}
-      run: make V=1 platformTest CC=$XCC QEMU_SYS=$XEMU
-
-    - name: ARM
-      if: ${{ matrix.type == 'ARM' }}
-      run: make V=1 platformTest CC=$XCC QEMU_SYS=$XEMU
-
-    - name: PPC
-      if: ${{ matrix.type == 'PPC' }}
-      run: make V=1 platformTest CC=$XCC QEMU_SYS=$XEMU
-
-    - name: PPC64LE
-      if: ${{ matrix.type == 'PPC64LE' }}
-      run: make V=1 platformTest CC=$XCC QEMU_SYS=$XEMU MOREFLAGS=-m64
-
-    - name: S390X
-      if: ${{ matrix.type == 'S390X' }}
-      run: make V=1 platformTest CC=$XCC QEMU_SYS=$XEMU
-
-
-  # macOS
-  lz4-platform-macos-latest:
-    name: macOS
-    runs-on: macos-latest
-    steps:
-    - uses: actions/checkout@v2
-
-    - name: Environment info
-      run: |
-        echo && type cc && which cc && cc --version
-        echo && type make && which make && make -v
-        echo && sysctl -a | grep machdep.cpu   # cpuinfo
-
-    - name: make default
-      run: CFLAGS="-Werror" make V=1 clean default
-
-    - name: make test
-      run: make clean; make -j V=1 test MOREFLAGS='-Werror -Wconversion -Wno-sign-conversion'
-
-    - name: Ensure `make test` doesn't depend on the status of the console
-      # see issue #990 for detailed explanations
-      run: make -j test > /dev/null
-
-
-###############################################################
-# Build systems
-#
-# - make
-# - cmake
-# - meson
-#
-
-  # make
-  lz4-build-make:
-    name: make
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-
-    - name: Environment info
-      run: |
-        echo && type cc && which cc && cc --version
-        echo && type make && which make && make -v
-
-    - name: make
-      run: make V=1
-
-
-  lz4-build-make-travis-install:
-    name: make travis-install
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-
-    - name: travis-install
-      run: make V=1 clean travis-install
-
-    - name: travis-install result
-      run: |
-        echo && echo Installed files
-        ( cd ~/install_test_dir; find .; )
-
-
-  # cmake
-  lz4-build-cmake:
-    name: cmake
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-
-    - name: Environment info
-      run: |
-        echo && type cmake && which cmake && cmake --version
-        echo && type make && which make && make -v
-
-    - name: cmake
-      run: |
-        cd build/cmake
-        mkdir build
-        cd build
-        cmake ..
-        CFLAGS=-Werror make VERBOSE=1
-
-
-  # Invoke cmake via Makefile
-  lz4-build-make-cmake:
-    name: make cmake
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-    - name: make cmake
-      # V=1 for lz4 Makefile, VERBOSE=1 for cmake Makefile.
-      run: make V=1 VERBOSE=1 clean cmake
-
-
-  # Meson
-  lz4-build-meson:
-    name: Meson + Ninja
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2 # https://github.com/actions/checkout
-    - uses: actions/setup-python@v2 # https://github.com/actions/setup-python
-      with:
-        python-version: '3.x'
-
-    - name: Install
-      run: |
-        sudo apt-get update
-        sudo apt-get install tree ninja-build
-        python -m pip install --upgrade pip
-        pip3 install --user meson
-
-    - name: Environment info
-      run: |
-        echo && type clang && which clang && clang --version
-        echo && type python && which python && python --version
-        echo && type meson && which meson && meson --version
-
-    - name: meson
-      # 'run: >' replaces all newlines in the following block with spaces
-      run: >
-        meson setup
-        --buildtype=debug
-        -Db_lundef=false
-        -Dauto_features=enabled
-        -Dprograms=true
-        -Dcontrib=true
-        -Dtests=true
-        -Dexamples=true
-        contrib/meson build
-
-    - name: staging
-      run: |
-        cd build
-        DESTDIR=./staging ninja install
-        tree ./staging
-
-
-
-############################################################
-# Check git tag for LZ4 releases
-#
-  lz4-check-tag:
-    name: git version tag checking for release
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2
-    - name: make -C tests checkTag
-      if: startsWith(github.ref, 'refs/tags/v')   # If git tag name starts with 'v'
-      run: |
-        echo "tag=${GITHUB_REF#refs/*/}"
-        make -C tests checkTag
-        tests/checkTag ${GITHUB_REF#refs/*/}
-
-
-
-############################################################
-# Gather CI environment information.
-#
-  lz4-env-info:
-    name: GH-Actions Virtual Env Info (${{ matrix.os }})
-    strategy:
-      matrix:
-        include: [
-          { os: ubuntu-latest,  }, # https://github.com/actions/virtual-environments/
-          { os: ubuntu-22.04,   }, # https://github.com/actions/virtual-environments/blob/main/images/linux/Ubuntu2204-Readme.md
-          { os: ubuntu-20.04,   }, # https://github.com/actions/virtual-environments/blob/main/images/linux/Ubuntu2004-Readme.md
-          { os: ubuntu-18.04,   }, # https://github.com/actions/virtual-environments/blob/main/images/linux/Ubuntu1804-Readme.md
-        ]
-
-    runs-on: ${{ matrix.os }}
-    steps:
-    - uses: actions/checkout@v2
-
-    - name: init
-      run: |
-        sudo apt-get update
-
-    - name: cc --version
-      run: echo && type cc && which cc && cc --version
-
-    - name: gcc --version
-      run: echo && type gcc && which gcc && gcc --version
-
-    - name: clang --version
-      run: echo && type clang && which clang && clang --version
-
-    - name: make -v
-      run: echo && type make && which make && make -v
-
-    - name: g++ --version
-      run: echo && type g++ && which g++ && g++ --version
-
-    - name: git --version
-      run: echo && type git && which git && git --version
-
-    - name: gcc packages (apt-cache)
-      run: apt-cache search gcc | grep "^gcc-[0-9\.]* " | sort
-
-    - name: lib32gcc packages for i386 (apt-cache)
-      run: apt-cache search lib32gcc | grep "^lib32gcc-" | sort
-
-    - name: libx32gcc packages for x32 (apt-cache)
-      run: apt-cache search libx32gcc | grep "^libx32gcc-" | sort
-
-    - name: gcc multilib packages (apt-cache)
-      run: apt-cache search multilib | grep "gcc-" | sort
-
-    - name: clang packages (apt-cache)
-      run: apt-cache search clang | grep "^clang-[0-9\.]* " | sort
-
-    - name: QEMU packages (apt-cache)
-      run: apt-cache search qemu | grep "^qemu-system-.*QEMU full system" | sort

.github/workflows/cmake-test.yml

@@ -0,0 +1,127 @@
+# Simplified CMake Build Tests
+name: CMake Build Tests
+
+on:
+  push:
+    branches: ['dev', 'release', '*cmake*']
+  pull_request:
+    branches: ['dev', 'release']
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  # Core functionality test - multi-platform
+  cmake-core-tests:
+    name: Core Tests (${{ matrix.os }}, ${{ matrix.build_type }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            build_type: Release
+            generator: ""
+          - os: ubuntu-latest
+            build_type: Debug
+            generator: ""
+          - os: windows-latest
+            build_type: Release
+            generator: '-G "Visual Studio 17 2022" -A x64'
+          - os: macos-latest
+            build_type: Release
+            generator: ""
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v6.0.2
+
+    - name: Set up MSVC (Windows)
+      if: runner.os == 'Windows'
+      uses: microsoft/setup-msbuild@v3
+
+    - name: Set up CMake
+      uses: jwlawson/actions-setup-cmake@v2
+      with:
+        cmake-version: latest
+
+    - name: Configure and Build
+      shell: bash
+      run: |
+        mkdir cmakebuild && cd cmakebuild
+        cmake ../build/cmake ${{ matrix.generator }} -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
+        cmake --build . --config ${{ matrix.build_type }}
+
+    - name: Test Installation (Linux only)
+      if: runner.os == 'Linux'
+      shell: bash
+      run: |
+        cd cmakebuild
+        cmake --install . --prefix install-test
+        test -f "install-test/lib/liblz4.a" || test -f "install-test/lib/liblz4.so"
+        test -f "install-test/include/lz4.h"
+
+  # CMake compatibility and integration tests
+  cmake-extended-tests:
+    name: Extended Tests
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        test_type: 
+          - cmake_versions
+          - static_lib
+          - integration
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v6.0.2
+
+    - name: Set up CMake
+      uses: jwlawson/actions-setup-cmake@v2
+      with:
+        cmake-version: ${{ matrix.test_type == 'cmake_versions' && '3.10.0' || 'latest' }}
+
+    - name: CMake Version Compatibility Test
+      if: matrix.test_type == 'cmake_versions'
+      run: |
+        mkdir cmakebuild && cd cmakebuild
+        cmake ../build/cmake
+        cmake --build .
+
+    - name: Static Library Test
+      if: matrix.test_type == 'static_lib'
+      run: |
+        # Build and install static library
+        CFLAGS="-Werror -O1" cmake -S build/cmake -B build -DBUILD_STATIC_LIBS=ON -DCMAKE_INSTALL_PREFIX=$PWD/install
+        cmake --build build --target install
+        
+        # Test find_package with static library
+        cmake -S tests/cmake -B build_test -DCMAKE_PREFIX_PATH=$PWD/install
+        cmake --build build_test
+
+    - name: Integration Test
+      if: matrix.test_type == 'integration'
+      run: |
+        # Build and install
+        cmake -S build/cmake -B build -DCMAKE_INSTALL_PREFIX=$PWD/install
+        cmake --build build --target install
+        
+        # Test find_package
+        cmake -S tests/cmake -B test_build -DCMAKE_PREFIX_PATH=$PWD/install
+        cmake --build test_build
+        cd test_build && ctest -V
+
+  # Makefile wrapper test
+  make-cmake-test:
+    name: Make CMake
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v6.0.2
+    - name: Test via Makefile
+      run: make clean && make cmakebuild

.github/workflows/code-quality.yml

@@ -0,0 +1,105 @@
+# Static analysis and code quality checks
+name: Code Quality
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  cppcheck:
+    name: Cppcheck Static Analysis
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install cppcheck
+      run: |
+        sudo apt-get update
+        sudo apt-get install cppcheck
+
+    - name: Display cppcheck version
+      run: |
+        type cppcheck && which cppcheck && cppcheck --version
+
+    - name: Run cppcheck analysis
+      # This test script ignores the exit code of cppcheck.
+      # See known issues in README.md.
+      run: make V=1 clean cppcheck || echo "There are some cppcheck reports but we ignore them for now."
+
+  scan-build:
+    name: Clang Static Analyzer
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install clang-tools
+      run: |
+        sudo apt-get update
+        sudo apt-get install clang-tools
+
+    - name: Display environment info
+      run: |
+        type gcc && which gcc && gcc --version
+        type clang && which clang && clang --version
+        type scan-build && which scan-build
+        type make && which make && make -v
+        cat /proc/cpuinfo || echo "/proc/cpuinfo is not present"
+
+    - name: Run static analysis
+      run: make V=1 clean staticAnalyze
+
+  valgrind:
+    name: Valgrind Memory Analysis
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install valgrind
+      run: |
+        sudo apt-get update
+        sudo apt-get install valgrind
+
+    - name: Display environment info
+      run: |
+        type cc && which cc && cc --version
+        type valgrind && which valgrind && valgrind --version
+
+    - name: Run memory analysis
+      run: make V=1 -C tests test-mem
+
+  unicode-lint:
+    name: Unicode Linting
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Check for unicode issues
+      run: bash ./tests/unicode_lint.sh
+
+  examples:
+    name: Build Examples
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install dependencies
+      run: sudo apt-get update
+
+    - name: Display compiler info
+      run: |
+        type cc && which cc && cc --version
+        type c++ && which c++ && c++ --version
+
+    - name: Build examples
+      run: make V=1 examples

.github/workflows/compilers.yml

@@ -0,0 +1,112 @@
+# Compiler compatibility testing across multiple C compilers
+name: Compiler Tests
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  compiler-matrix:
+    name: ${{ matrix.cc }} on ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          # System default compilers
+          - { pkgs: '', cc: cc, cxx: c++, x86: true, cxxtest: true, freestanding: true, os: ubuntu-latest }
+          - { pkgs: '', cc: gcc, cxx: g++, x86: true, cxxtest: true, freestanding: true, os: ubuntu-latest }
+          
+          # GCC versions - latest stable and LTS
+          - { pkgs: 'gcc-14 g++-14 lib32gcc-14-dev', cc: gcc-14, cxx: g++-14, x86: true, cxxtest: true, freestanding: true, os: ubuntu-24.04 }
+          - { pkgs: 'gcc-11 g++-11 lib32gcc-11-dev', cc: gcc-11, cxx: g++-11, x86: true, cxxtest: true, freestanding: true, os: ubuntu-22.04 }
+          
+          # Clang versions - system default, latest stable, and older stable
+          - { pkgs: 'lib32gcc-12-dev', cc: clang, cxx: clang++, x86: true, cxxtest: true, freestanding: false, os: ubuntu-latest }
+          - { pkgs: 'clang-18 lib32gcc-12-dev', cc: clang-18, cxx: clang++-18, x86: true, cxxtest: true, freestanding: false, os: ubuntu-24.04 }
+          - { pkgs: 'clang-14 lib32gcc-12-dev', cc: clang-14, cxx: clang++-14, x86: true, cxxtest: true, freestanding: false, os: ubuntu-22.04 }
+
+    runs-on: ${{ matrix.os }}
+    env:
+      CC: ${{ matrix.cc }}
+      CXX: ${{ matrix.cxx }}
+      FIXME__LZ4_CI_IGNORE: ' echo Error. But we ignore it for now.'
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib
+        if [ "${{ matrix.pkgs }}" != "" ]; then
+          sudo apt-get install ${{ matrix.pkgs }}
+        fi
+
+    - name: Display environment info
+      run: |
+        echo "=== Compiler Information ==="
+        type $CC && which $CC && $CC --version
+        echo "=== C++ Compiler Information ==="
+        type $CXX && which $CXX && $CXX --version
+
+    - name: Basic build test
+      run: make -j V=1
+
+    - name: Installation test
+      run: make -C tests test-install V=1
+
+    - name: Build all with strict flags
+      run: |
+        make clean
+        CFLAGS="-Werror -O0" make -j all V=1
+
+    - name: C90 standard compliance test
+      run: |
+        make clean
+        make -j c_standards_c90 V=1
+
+    - name: C11 standard compliance test
+      run: |
+        make clean
+        make -j c_standards_c11 V=1
+
+    - name: C library for C++ program test
+      if: ${{ matrix.cxxtest }}
+      run: |
+        make clean
+        make -j ctocxxtest V=1
+
+    - name: C++ compilation test
+      if: ${{ matrix.cxxtest }}
+      run: |
+        make clean
+        make -j cxxtest V=1
+
+    - name: Freestanding environment test
+      if: ${{ matrix.freestanding }}
+      run: |
+        make clean
+        make test-freestanding V=1
+
+    - name: Fortified build test
+      run: |
+        make clean
+        CFLAGS='-fPIC' LDFLAGS='-pie -fPIE -D_FORTIFY_SOURCE=2' make -j -C programs default V=1
+
+    - name: Core functionality test
+      run: |
+        make clean
+        CPPFLAGS=-DLZ4IO_NO_TSAN_ONLY make -j V=1 -C tests test-lz4
+
+    - name: 32-bit compatibility test
+      if: ${{ matrix.x86 }}
+      run: |
+        make clean
+        CFLAGS='-Werror -O1' make -j -C tests test-lz4c32 V=1

.github/workflows/core-tests.yml

@@ -0,0 +1,163 @@
+# Core LZ4 functionality testing
+name: Core Tests
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  benchmark:
+    name: Benchmark Tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib
+
+    - name: Basic compression test
+      run: make -j -C tests test-lz4c V=1
+
+    - name: Full benchmark test
+      run: make -j -C tests test-fullbench V=1
+
+    - name: 32-bit benchmark test
+      run: make -j -C tests test-fullbench32 V=1
+
+  fuzzer:
+    name: Fuzzer Tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib
+
+    - name: Setup memory mapping
+      run: sudo sysctl -w vm.mmap_min_addr=4096
+
+    - name: Fuzzer test (64-bit)
+      run: make -j -C tests test-fuzzer V=1
+
+    - name: Fuzzer test (32-bit)
+      run: make -C tests test-fuzzer32 V=1
+
+  versions:
+    name: Version Compatibility Tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib
+
+    - name: Version compatibility test
+      run: make -j -C tests versionsTest V=1
+
+  abi:
+    name: ABI Compatibility Tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib
+
+    - name: ABI compatibility test
+      run: make -j -C tests abiTests V=1
+
+  frame:
+    name: LZ4 Frame Tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib
+
+    - name: Frame format test (64-bit)
+      run: make -j -C tests test-frametest V=1
+
+    - name: Frame format test (32-bit)
+      run: make -j -C tests test-frametest32 V=1
+
+  memory-usage:
+    name: Memory Usage Tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Test different LZ4_MEMORY_USAGE values
+      run: make V=1 -C tests test-compile-with-lz4-memory-usage
+
+  custom-distance:
+    name: Custom Configuration Tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Custom LZ4_DISTANCE_MAX test
+      run: |
+        CPPFLAGS='-DLZ4_DISTANCE_MAX=8000' make V=1 check
+        make clean
+
+    - name: Dynamic library linking test
+      run: |
+        make -C programs lz4-wlib V=1
+        make clean
+
+    - name: User memory functions test
+      run: |
+        make -C tests fullbench-wmalloc V=1
+        make clean
+        CC="c++ -Wno-deprecated" make -C tests fullbench-wmalloc V=1
+
+  makefile-variables:
+    name: Makefile Standard Variables Test
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Test standard variable propagation
+      run: make test_stdvars V=1
+
+  block-device:
+    name: Block Device Compression Test
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Test block device compression
+      run: |
+        make lz4
+        dd if=/dev/zero of=full0.img bs=2M count=1
+        BLOCK_DEVICE=$(sudo losetup --show -fP full0.img)
+        sudo chmod 666 $BLOCK_DEVICE
+        ./lz4 -v $BLOCK_DEVICE -c > /dev/null
+        sudo losetup -d $BLOCK_DEVICE
+        rm full0.img

.github/workflows/cross-platform.yml

@@ -0,0 +1,93 @@
+# Cross-platform testing using QEMU emulation
+name: Cross Platform
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  qemu-platforms:
+    name: ${{ matrix.arch }} (QEMU)
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - { arch: ARM,      pkgs: 'qemu-system-arm   gcc-arm-linux-gnueabi',     xcc: arm-linux-gnueabi-gcc,     xemu: qemu-arm-static,     makevar: "" }
+          - { arch: ARM64,    pkgs: 'qemu-system-arm   gcc-aarch64-linux-gnu',     xcc: aarch64-linux-gnu-gcc,     xemu: qemu-aarch64-static, makevar: "" }
+          - { arch: PPC,      pkgs: 'qemu-system-ppc   gcc-powerpc-linux-gnu',     xcc: powerpc-linux-gnu-gcc,     xemu: qemu-ppc-static,     makevar: "" }
+          - { arch: PPC64LE,  pkgs: 'qemu-system-ppc   gcc-powerpc64le-linux-gnu', xcc: powerpc64le-linux-gnu-gcc, xemu: qemu-ppc64le-static, makevar: "" }
+          - { arch: S390X,    pkgs: 'qemu-system-s390x gcc-s390x-linux-gnu',       xcc: s390x-linux-gnu-gcc,       xemu: qemu-s390x-static,   makevar: "" }
+          - { arch: MIPS,     pkgs: 'qemu-system-mips gcc-mips-linux-gnu',         xcc: mips-linux-gnu-gcc,        xemu: qemu-mips-static,    makevar: "" }
+          - { arch: M68K,     pkgs: 'qemu-system-m68k gcc-m68k-linux-gnu',         xcc: m68k-linux-gnu-gcc,        xemu: qemu-m68k-static,    makevar: "HAVE_MULTITHREAD=0" }
+          - { arch: RISC-V,   pkgs: 'qemu-system-riscv64 gcc-riscv64-linux-gnu',   xcc: riscv64-linux-gnu-gcc,     xemu: qemu-riscv64-static, makevar: "" }
+          - { arch: SPARC,    pkgs: 'qemu-system-sparc gcc-sparc64-linux-gnu',     xcc: sparc64-linux-gnu-gcc,     xemu: qemu-sparc64-static, makevar: "" }
+
+    runs-on: ubuntu-latest
+    env:
+      XCC: ${{ matrix.xcc }}
+      XEMU: ${{ matrix.xemu }}
+      MAKEVAR: ${{ matrix.makevar }}
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install cross-compilation tools
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib qemu-utils qemu-user-static
+        sudo apt-get install ${{ matrix.pkgs }}
+
+    - name: Display environment info
+      run: |
+        echo "=== Cross Compiler Information ==="
+        type $XCC && which $XCC && $XCC --version
+        $XCC -v  # Show built-in specs
+        echo "=== QEMU Emulator Information ==="
+        type $XEMU && which $XEMU && $XEMU --version
+
+    - name: Run platform tests (ARM/ARM64/PPC/S390X)
+      if: contains(fromJSON('["ARM", "ARM64", "PPC", "S390X"]'), matrix.arch)
+      run: make platformTest V=1 CC=$XCC QEMU_SYS=$XEMU
+
+    - name: Run platform tests (PPC64LE)
+      if: matrix.arch == 'PPC64LE'
+      run: CFLAGS=-m64 make platformTest V=1 CC=$XCC QEMU_SYS=$XEMU
+
+    - name: Run platform tests (MIPS/M68K/RISC-V/SPARC)
+      if: contains(fromJSON('["MIPS", "M68K", "RISC-V", "SPARC"]'), matrix.arch)
+      run: make platformTest V=1 CC=$XCC QEMU_SYS=$XEMU $MAKEVAR
+
+  macos:
+    name: macOS
+    runs-on: macos-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Display environment info
+      run: |
+        type cc && which cc && cc --version
+        type make && which make && make -v
+        sysctl -a | grep machdep.cpu  # CPU info
+
+    - name: Build with strict flags
+      run: |
+        make clean
+        CFLAGS="-Werror -O0" make default V=1
+
+    - name: Run comprehensive tests
+      run: |
+        make clean
+        CFLAGS="-O3 -Werror -Wconversion -Wno-sign-conversion" make -j test V=1
+
+    - name: Test console independence
+      # Ensure `make test` doesn't depend on the status of the console
+      # See issue #990 for detailed explanations
+      run: make -j test > /dev/null

.github/workflows/oss-fuzz.yml

@@ -0,0 +1,45 @@
+# OSS-Fuzz integration testing
+name: OSS-Fuzz
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  oss-fuzz:
+    name: OSS-Fuzz (${{ matrix.sanitizer }})
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        sanitizer: [address, undefined, memory]
+
+    steps:
+    - name: Build Fuzzers
+      id: build
+      uses: google/oss-fuzz/infra/cifuzz/actions/build_fuzzers@master
+      with:
+        oss-fuzz-project-name: 'lz4'
+        dry-run: false
+        sanitizer: ${{ matrix.sanitizer }}
+
+    - name: Run Fuzzers
+      uses: google/oss-fuzz/infra/cifuzz/actions/run_fuzzers@master
+      with:
+        oss-fuzz-project-name: 'lz4'
+        fuzz-seconds: 100
+        dry-run: false
+        sanitizer: ${{ matrix.sanitizer }}
+
+    - name: Upload Crash Artifacts
+      uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+      if: failure() && steps.build.outcome == 'success'
+      with:
+        name: ${{ matrix.sanitizer }}-artifacts
+        path: ./out/artifacts

.github/workflows/release-environment.yml

@@ -0,0 +1,69 @@
+# Release and environment testing
+name: Release & Environment
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  check-git-tag:
+    name: Git Version Tag Check
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Validate release tag
+      if: startsWith(github.ref, 'refs/tags/v')
+      run: |
+        echo "tag=${GITHUB_REF#refs/*/}"
+        make -C tests checkTag
+        tests/checkTag ${GITHUB_REF#refs/*/}
+
+  environment-info:
+    name: Environment Info (${{ matrix.os }})
+    strategy:
+      matrix:
+        os: [ubuntu-latest, ubuntu-24.04, ubuntu-22.04]
+
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Update package list
+      run: sudo apt-get update
+
+    - name: Display compiler versions
+      run: |
+        echo "=== Default C Compiler ==="
+        type cc && which cc && cc --version
+        echo "=== GCC ==="
+        type gcc && which gcc && gcc --version
+        echo "=== Clang ==="
+        type clang && which clang && clang --version
+        echo "=== Make ==="
+        type make && which make && make -v
+        echo "=== G++ ==="
+        type g++ && which g++ && g++ --version
+        echo "=== Git ==="
+        type git && which git && git --version
+
+    - name: List available package versions
+      run: |
+        echo "=== Available GCC Packages ==="
+        apt-cache search gcc | grep "^gcc-[0-9\.]* " | sort
+        echo "=== Available lib32gcc Packages (i386) ==="
+        apt-cache search lib32gcc | grep "^lib32gcc-" | sort
+        echo "=== Available GCC Multilib Packages ==="
+        apt-cache search multilib | grep "gcc-" | sort
+        echo "=== Available Clang Packages ==="
+        apt-cache search clang | grep "^clang-[0-9\.]* " | sort
+        echo "=== Available QEMU Packages ==="
+        apt-cache search qemu | grep "^qemu-system-.*QEMU full system" | sort

.github/workflows/sanitizers.yml

@@ -0,0 +1,99 @@
+# Sanitizer testing (AddressSanitizer, MemorySanitizer, etc.)
+name: Sanitizers
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
+jobs:
+  ubsan-x64:
+    name: UndefinedBehaviorSanitizer (x64)
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Run UBSan tests
+      run: make ubsan V=1
+
+  ubsan-x86:
+    name: UndefinedBehaviorSanitizer (x86)
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Install 32-bit dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install gcc-multilib lib32gcc-11-dev
+
+    - name: Run UBSan tests (32-bit)
+      run: |
+        make clean
+        CC=clang make V=1 usan32
+
+  asan-x64:
+    name: AddressSanitizer (x64)
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: Setup memory mapping
+      run: sudo sysctl -w vm.mmap_min_addr=4096
+
+    - name: ASan - basic check
+      run: |
+        make clean
+        CFLAGS=-fsanitize=address LDFLAGS=-fsanitize=address make -j check V=1
+
+    - name: ASan - frame test
+      run: |
+        make clean
+        CFLAGS=-fsanitize=address LDFLAGS=-fsanitize=address make -j -C tests test-frametest V=1
+
+    - name: ASan - fuzzer test
+      run: |
+        make clean
+        CFLAGS=-fsanitize=address LDFLAGS=-fsanitize=address make -j -C tests test-fuzzer V=1
+
+  msan-x64:
+    name: MemorySanitizer (x64)
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: MSan - basic check
+      run: |
+        make clean
+        CC=clang CFLAGS=-fsanitize=memory LDFLAGS=-fsanitize=memory make -j check V=1
+
+    - name: MSan - frame test
+      run: |
+        make clean
+        CC=clang CFLAGS=-fsanitize=memory LDFLAGS=-fsanitize=memory make -j -C tests test-frametest V=1
+
+    - name: MSan - fuzzer test
+      run: |
+        make clean
+        CC=clang CFLAGS=-fsanitize=memory LDFLAGS=-fsanitize=memory make -j -C tests test-fuzzer V=1
+
+  tsan-x64:
+    name: ThreadSanitizer (x64)
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+    - name: TSan - CLI test
+      run: |
+        make clean
+        CC=clang CPPFLAGS="-fsanitize=thread" make -j -C tests test-lz4 V=1

.github/workflows/scorecard.yml

@@ -0,0 +1,65 @@
+# This workflow uses actions that are not certified by GitHub. They are provided
+# by a third-party and are governed by separate terms of service, privacy
+# policy, and support documentation.
+
+name: Scorecard supply-chain security
+on:
+  # For Branch-Protection check. Only the default branch is supported. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#branch-protection
+  branch_protection_rule:
+  # To guarantee Maintained check is occasionally updated. See
+  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#maintained
+  schedule:
+    - cron: '23 22 * * 3'
+  push:
+    branches: [ "dev" ]
+
+# Declare default permissions as read only.
+permissions: read-all
+
+jobs:
+  analysis:
+    name: Scorecard analysis
+    runs-on: ubuntu-latest
+    permissions:
+      # Needed to upload the results to code-scanning dashboard.
+      security-events: write
+      # Needed to publish results and get a badge (see publish_results below).
+      id-token: write
+
+    steps:
+      - name: "Checkout code"
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: "Run analysis"
+        uses: ossf/scorecard-action@62b2cac7ed8198b15735ed49ab1e5cf35480ba46 # v2.4.0
+        with:
+          results_file: results.sarif
+          results_format: sarif
+          # (Optional) "write" PAT token. Uncomment the `repo_token` line below if:
+          # you want to enable the Branch-Protection check on a *public* repository
+          # To create the PAT, follow the steps in
+          # https://github.com/ossf/scorecard-action#authentication-with-fine-grained-pat-optional
+          # repo_token: ${{ secrets.SCORECARD_TOKEN }}
+
+          # - Publish results to OpenSSF REST API for easy access by consumers
+          # - Allows the repository to include the Scorecard badge.
+          # - See https://github.com/ossf/scorecard-action#publishing-results.
+          publish_results: true
+
+      # Upload the results as artifacts (optional). Commenting out will disable uploads of run results in SARIF
+      # format to the repository Actions tab.
+      - name: "Upload artifact"
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: SARIF file
+          path: results.sarif
+          retention-days: 5
+
+      # Upload the results to GitHub's code scanning dashboard.
+      - name: "Upload to code-scanning"
+        uses: github/codeql-action/upload-sarif@c10b8064de6f491fea524254123dbe5e09572f13 # v4.35.1
+        with:
+          sarif_file: results.sarif

.gitignore

@@ -1,6 +1,8 @@
 # Object files
 *.o
 *.ko
+obj/
+cacheObjs/
 
 # Libraries
 *.lib
@@ -19,13 +21,23 @@
 *.app
 lz4
 
+# Builders
+cmakebuild/
+builddir/
+cachedObjs/
+
 # IDE / editors files
 .clang_complete
+.vscode
 _codelite/
 _codelite_lz4/
 bin/
 *.zip
 *.swp
+compile_flags.txt
+compile_commands.json
+.vscode
+.cache
 
 # analyzers
 infer-out
@@ -41,3 +53,12 @@ ld.exe*
 # test artifacts
 *.lz4
 tmp*
+.stdvars.log
+cmake_download/
+cmake_bins/
+cmake_build/
+cmake_install_test/
+
+# generated Windows resource files
+lib/*.rc
+programs/*.rc

.travis.yml

@@ -1,42 +0,0 @@
-language: c
-
-matrix:
-  fast_finish: true
-  include:
-
-    - name: aarch64 real-hw tests
-      arch: arm64
-      script:
-        - make test
-
-    - name: PPC64LE real-hw tests
-      arch: ppc64le
-      script:
-        - make test
-
-    - name: IBM s390x real-hw tests
-      arch: s390x
-      script:
-        - make test
-
-    # tag-specific test
-    - name: tag build
-      if: tag =~ ^v[0-9]\.[0-9]
-      os: linux
-      script:
-        - make -C tests checkTag
-        - tests/checkTag "$TRAVIS_BRANCH"
-
-    # oss-fuzz compilation test
-    - name: Compile OSS-Fuzz targets
-      script:
-        - ./ossfuzz/travisoss.sh
-
-    # Unicode lint
-    # See https://github.com/lz4/lz4/issues/1018
-    - name: Run Unicode lint
-      script:
-        - ./tests/unicode_lint.sh
-
-  allow_failures:
-    - env: ALLOW_FAILURES=true

CODING_STYLE

@@ -0,0 +1,57 @@
+LZ4 CODING STYLE
+================
+
+When contributing code and patches to the `LZ4` project, the following rules are expected to be followed for a successful merge.
+
+
+Library
+-------
+
+The library's source code in `lib/` directory has a BSD 2-clause license.
+It's designed to be integrated into 3rd party applications.
+
+It adheres relatively strictly to vanilla `C90`, with the following exceptions:
+- `long long` type is required, in order to support 64-bit values
+- Variadic Macros are used for debug mode (but not required in release mode)
+
+Beyond that, all other rules and limitations of C90 must be respected, including `/* ... */` comment style only, and variable declaration at top of block only. The automated CI test suite will check for these rules.
+
+The code is allowed to use more modern variants (C99 / C11 / C23) when useful
+as long as it provides a clean C90 backup for older compilers.
+For example, C99+ compilers will employ the `restrict` keyword, while `C90` ones will ignore it, thanks to conditional macros.
+This ensures maximum portability across a wide range of systems.
+
+Moreover, in the interest of safety, the code has to respect a fairly strigent list of additional restrictions, provided through warning flags, the list of which is maintained within `Makefile`.
+Among the less common ones, we want the source to be compatible with `-Wc++-compat`, which ensures that the code can be compiled "as is", with no modification, as C++ code. It makes it possible to copy-paste the code into other C++ source files, or the source files are just dropped into a C++ environment which then compiles them as C++ source files.
+
+
+Command Line Interface
+----------------------
+
+The CLI executable's source code in `programs/` directory has a GPLv2+ license.
+While it's designed to be portable and freely distributable, it's not meant to be integrated into 3rd party applications.
+The license difference is meant to reflect that choice.
+
+Similar to the library, the CLI adheres relatively strictly to vanilla `C90`, and features the same exceptions:
+- `long long` requirement for 64-bit values
+- Variadic Macros for console messages (now used all the time, not just debug mode)
+
+The code can also use system-specific libraries and symbols (such as `posix` ones)
+as long as it provides a backup for plain `C90` platforms.
+It's even allowed to lose capabilities, as long as the CLI can be cleanly compiled on `C90`.
+For example, systems without `<pthread>` support nor Completion Ports will just not feature multi-threading support, and run single threaded.
+
+In the interest of build familiarity, the CLI source code also respects the same set of advanced warning flags as the library.
+That being said, this last part is debatable and could deviate in the future.
+For example, there are less reasons to support `-Wc++-compat` on the CLI side, since it's not meant to be integrated into 3rd party applications.
+
+
+Others
+------
+
+The repository includes other directories with their own set of compilable projects, such as `tests/`, `examples/` and `contrib/`.
+
+These repositories do not have to respect the same set of restrictions, and can employ a larger array of different languages.
+For example, some tests employ `sh`, and others employ `python`.
+
+These directories may nonetheless include several targets employing the same coding convention as the `lz4` library. This is in a no way a rule, more like a side effect of build familiarity.

LICENSE

@@ -1,6 +1,6 @@
 This repository uses 2 different licenses :
 - all files in the `lib` directory use a BSD 2-Clause license
-- all other files use a GPLv2 license, unless explicitly stated otherwise
+- all other files use a GPL-2.0-or-later license, unless explicitly stated otherwise
 
 Relevant license is reminded at the top of each source file,
 and with presence of COPYING or LICENSE file in associated directories.

Makefile

@@ -1,6 +1,6 @@
 # ################################################################
 # LZ4 - Makefile
-# Copyright (C) Yann Collet 2011-2020
+# Copyright (C) Yann Collet 2011-2023
 # All rights reserved.
 #
 # BSD license
@@ -36,8 +36,9 @@ TESTDIR = tests
 EXDIR   = examples
 FUZZDIR = ossfuzz
 
-include Makefile.inc
+include build/make/lz4defs.make
 
+MAKE += --no-print-directory
 
 .PHONY: default
 default: lib-release lz4-release
@@ -52,19 +53,17 @@ all: allmost examples manuals build_tests
 allmost: lib lz4
 
 .PHONY: lib lib-release liblz4.a
-lib: liblz4.a
 lib lib-release liblz4.a:
 	$(MAKE) -C $(LZ4DIR) $@
 
 .PHONY: lz4 lz4-release
-lz4 : liblz4.a
-lz4-release : lib-release
 lz4 lz4-release :
 	$(MAKE) -C $(PRGDIR) $@
-	cp $(PRGDIR)/lz4$(EXT) .
+	$(LN_SF) $(PRGDIR)/lz4$(EXT) .
+	echo lz4 build completed
 
 .PHONY: examples
-examples: liblz4.a
+examples: lib
 	$(MAKE) -C $(EXDIR) all
 
 .PHONY: manuals
@@ -76,6 +75,7 @@ build_tests:
 	$(MAKE) -C $(TESTDIR) all
 
 .PHONY: clean
+clean: MAKEFLAGS= --no-print-directory
 clean:
 	$(MAKE) -C $(LZ4DIR) $@ > $(VOID)
 	$(MAKE) -C $(PRGDIR) $@ > $(VOID)
@@ -84,7 +84,7 @@ clean:
 	$(MAKE) -C $(FUZZDIR) $@ > $(VOID)
 	$(MAKE) -C contrib/gen_manual $@ > $(VOID)
 	$(RM) lz4$(EXT)
-	$(RM) -r $(CMAKE_BUILD_DIR)
+	$(RM) -r $(CMAKE_BUILD_DIR) $(MESON_BUILD_DIR)
 	@echo Cleaning completed
 
 
@@ -99,8 +99,8 @@ install uninstall:
 	$(MAKE) -C $(LZ4DIR) $@
 	$(MAKE) -C $(PRGDIR) $@
 
-.PHONY: travis-install
-travis-install:
+.PHONY: test-install
+test-install:
 	$(MAKE) -j1 install DESTDIR=~/install_test_dir
 
 endif   # POSIX_ENV
@@ -113,11 +113,18 @@ HOST_OS = MSYS
 CMAKE_PARAMS = -G"MSYS Makefiles"
 endif
 
-.PHONY: cmake
-cmake:
+.PHONY: cmakebuild
+cmakebuild:
 	mkdir -p $(CMAKE_BUILD_DIR)
 	cd $(CMAKE_BUILD_DIR); $(CMAKE) $(CMAKE_PARAMS) ..; $(CMAKE) --build .
 
+MESON ?= meson
+MESON_BUILD_DIR ?= mesonBuildDir
+
+.PHONY: mesonbuild
+mesonbuild:
+	$(MESON) setup --fatal-meson-warnings --buildtype=debug -Db_lundef=false -Dauto_features=enabled -Dprograms=true -Dcontrib=true -Dtests=true -Dexamples=true build/meson $(MESON_BUILD_DIR)
+	$(MESON) test -C $(MESON_BUILD_DIR)
 
 #------------------------------------------------------------------------
 # make tests validated only for MSYS and Posix environments
@@ -137,23 +144,6 @@ test:
 	$(MAKE) -C $(TESTDIR) $@
 	$(MAKE) -C $(EXDIR) $@
 
-.PHONY: clangtest
-clangtest: CFLAGS += -Werror -Wconversion -Wno-sign-conversion
-clangtest: CC = clang
-clangtest: clean
-	$(CC) -v
-	$(MAKE) -C $(LZ4DIR)  all CC=$(CC)
-	$(MAKE) -C $(PRGDIR)  all CC=$(CC)
-	$(MAKE) -C $(TESTDIR) all CC=$(CC)
-
-.PHONY: clangtest-native
-clangtest-native: CFLAGS = -O3 -Werror -Wconversion -Wno-sign-conversion
-clangtest-native: clean
-	clang -v
-	$(MAKE) -C $(LZ4DIR)  all    CC=clang
-	$(MAKE) -C $(PRGDIR)  native CC=clang
-	$(MAKE) -C $(TESTDIR) native CC=clang
-
 .PHONY: usan
 usan: CC      = clang
 usan: CFLAGS  = -O3 -g -fsanitize=undefined -fno-sanitize-recover=undefined -fsanitize-recover=pointer-overflow
@@ -161,11 +151,14 @@ usan: LDFLAGS = $(CFLAGS)
 usan: clean
 	CC=$(CC) CFLAGS='$(CFLAGS)' LDFLAGS='$(LDFLAGS)' $(MAKE) test FUZZER_TIME="-T30s" NB_LOOPS=-i1
 
+.PHONY: ubsan
+ubsan: usan
+
 .PHONY: usan32
-usan32: CFLAGS = -m32 -O3 -g -fsanitize=undefined
+usan32: CFLAGS = -m32 -O3 -g -fsanitize=undefined -fno-sanitize-recover=undefined -fsanitize-recover=pointer-overflow
 usan32: LDFLAGS = $(CFLAGS)
 usan32: clean
-	$(MAKE) test FUZZER_TIME="-T30s" NB_LOOPS=-i1
+	CFLAGS='$(CFLAGS)' LDFLAGS='$(LDFLAGS)' $(MAKE) V=1 test FUZZER_TIME="-T30s" NB_LOOPS=-i1
 
 SCANBUILD ?= scan-build
 SCANBUILD_FLAGS += --status-bugs -v --force-analyze-debug-code
@@ -181,59 +174,62 @@ cppcheck:
 platformTest: clean
 	@echo "\n ---- test lz4 with $(CC) compiler ----"
 	$(CC) -v
-	CFLAGS="-O3 -Werror"         $(MAKE) -C $(LZ4DIR) all
-	CFLAGS="-O3 -Werror -static" $(MAKE) -C $(PRGDIR) all
-	CFLAGS="-O3 -Werror -static" $(MAKE) -C $(TESTDIR) all
+	CFLAGS="$(CFLAGS) -O3 -Werror"         $(MAKE) -C $(LZ4DIR) all
+	CFLAGS="$(CFLAGS) -O3 -Werror -static" $(MAKE) -C $(PRGDIR) all
+	CFLAGS="$(CFLAGS) -O3 -Werror -static" $(MAKE) -C $(TESTDIR) all
 	$(MAKE) -C $(TESTDIR) test-platform
 
 .PHONY: versionsTest
-versionsTest: clean
+versionsTest:
+	$(MAKE) -C $(TESTDIR) clean
 	$(MAKE) -C $(TESTDIR) $@
 
 .PHONY: test-freestanding
 test-freestanding:
-	$(MAKE) -C $(TESTDIR) clean $@
+	$(MAKE) -C $(TESTDIR) clean
+	$(MAKE) -C $(TESTDIR) $@
+
+# test linking C libraries from C++ executables
+.PHONY: ctocxxtest
+ctocxxtest: LIBCC="$(CC)"
+ctocxxtest: EXECC="$(CXX) -Wno-deprecated"
+ctocxxtest: CFLAGS=-O0
+ctocxxtest:
+	CFLAGS="$(CFLAGS)" CC=$(LIBCC) $(MAKE) -C $(LZ4DIR)  all
+	CC=$(LIBCC) $(MAKE) -C $(TESTDIR) CFLAGS="$(CFLAGS)" lz4.o lz4hc.o lz4frame.o
+	CC=$(EXECC) $(MAKE) -C $(TESTDIR) CFLAGS="$(CFLAGS)" all
 
 .PHONY: cxxtest cxx32test
+cxx32test: CFLAGS += -m32
 cxxtest cxx32test: CC := "$(CXX) -Wno-deprecated"
 cxxtest cxx32test: CFLAGS = -O3 -Wall -Wextra -Wundef -Wshadow -Wcast-align -Werror
-cxx32test: CFLAGS += -m32
-cxxtest cxx32test: clean
+cxxtest cxx32test:
 	$(CXX) -v
-	CC=$(CC) $(MAKE) -C $(LZ4DIR)  all CFLAGS="$(CFLAGS)"
-	CC=$(CC) $(MAKE) -C $(PRGDIR)  all CFLAGS="$(CFLAGS)"
-	CC=$(CC) $(MAKE) -C $(TESTDIR) all CFLAGS="$(CFLAGS)"
+	CC=$(CC) CFLAGS="$(CFLAGS)" $(MAKE) -C $(LZ4DIR)  all
+	CC=$(CC) CFLAGS="$(CFLAGS)" $(MAKE) -C $(PRGDIR)  all
+	CC=$(CC) CFLAGS="$(CFLAGS)" $(MAKE) -C $(TESTDIR) all
 
 .PHONY: cxx17build
 cxx17build : CC = "$(CXX) -Wno-deprecated"
-cxx17build : CFLAGS = -std=c++17 -Wall -Wextra -Wundef -Wshadow -Wcast-align -Werror -pedantic
+cxx17build : CFLAGS = -std=c++17 -Wall -Wextra -Wundef -Wshadow -Wcast-align -Werror -Wpedantic
 cxx17build : clean
 	$(CXX) -v
 	CC=$(CC) $(MAKE) -C $(LZ4DIR)  all CFLAGS="$(CFLAGS)"
 	CC=$(CC) $(MAKE) -C $(PRGDIR)  all CFLAGS="$(CFLAGS)"
 	CC=$(CC) $(MAKE) -C $(TESTDIR) all CFLAGS="$(CFLAGS)"
 
-.PHONY: ctocpptest
-ctocpptest: LIBCC="$(CC)"
-ctocpptest: TESTCC="$(CXX)"
-ctocpptest: CFLAGS=
-ctocpptest: clean
-	CC=$(LIBCC)  $(MAKE) -C $(LZ4DIR)  CFLAGS="$(CFLAGS)" all
-	CC=$(LIBCC)  $(MAKE) -C $(TESTDIR) CFLAGS="$(CFLAGS)" lz4.o lz4hc.o lz4frame.o
-	CC=$(TESTCC) $(MAKE) -C $(TESTDIR) CFLAGS="$(CFLAGS)" all
-
 .PHONY: c_standards
 c_standards: clean c_standards_c11 c_standards_c99 c_standards_c90
 
 .PHONY: c_standards_c90
 c_standards_c90: clean
-	$(MAKE) clean; CFLAGS="-std=c90   -Werror -pedantic -Wno-long-long -Wno-variadic-macros" $(MAKE) allmost
-	$(MAKE) clean; CFLAGS="-std=gnu90 -Werror -pedantic -Wno-long-long -Wno-variadic-macros" $(MAKE) allmost
+	$(MAKE) clean; CFLAGS="-std=c90   -Werror -Wpedantic -Wno-long-long -Wno-variadic-macros" $(MAKE) allmost
+	$(MAKE) clean; CFLAGS="-std=gnu90 -Werror -Wpedantic -Wno-long-long -Wno-variadic-macros" $(MAKE) allmost
 
 .PHONY: c_standards_c99
 c_standards_c99: clean
-	$(MAKE) clean; CFLAGS="-std=c99   -Werror -pedantic" $(MAKE) all
-	$(MAKE) clean; CFLAGS="-std=gnu99 -Werror -pedantic" $(MAKE) all
+	$(MAKE) clean; CFLAGS="-std=c99   -Werror -Wpedantic" $(MAKE) all
+	$(MAKE) clean; CFLAGS="-std=gnu99 -Werror -Wpedantic" $(MAKE) all
 
 .PHONY: c_standards_c11
 c_standards_c11: clean
@@ -242,38 +238,20 @@ c_standards_c11: clean
 # The following test ensures that standard Makefile variables set through environment
 # are correctly transmitted at compilation stage.
 # This test is meant to detect issues like https://github.com/lz4/lz4/issues/958
-.PHONY: standard_variables
-standard_variables: clean
-	@echo =================
-	@echo Check support of Makefile Standard variables through environment
-	@echo note : this test requires V=1 to work properly
-	@echo =================
-	CC="cc -DCC_TEST" \
-	CFLAGS=-DCFLAGS_TEST \
-	CPPFLAGS=-DCPPFLAGS_TEST \
-	LDFLAGS=-DLDFLAGS_TEST \
-	LDLIBS=-DLDLIBS_TEST \
-	$(MAKE) V=1 > tmpsv
-	# Note: just checking the presence of custom flags
-	# would not detect situations where custom flags are
-	# supported in some part of the Makefile, and missed in others.
-	# So the test checks if they are present the _right nb of times_.
-	# However, checking static quantities makes this test brittle,
-	# because quantities (7, 2 and 1) can still evolve in future,
-	# for example when source directories or Makefile evolve.
-	if [ $$(grep CC_TEST tmpsv | wc -l) -ne 7 ]; then \
-		echo "CC environment variable missed" && False; fi
-	if [ $$(grep CFLAGS_TEST tmpsv | wc -l) -ne 7 ]; then \
-		echo "CFLAGS environment variable missed" && False; fi
-	if [ $$(grep CPPFLAGS_TEST tmpsv | wc -l) -ne 7 ]; then \
-		echo "CPPFLAGS environment variable missed" && False; fi
-	if [ $$(grep LDFLAGS_TEST tmpsv | wc -l) -ne 2 ]; then \
-		echo "LDFLAGS environment variable missed" && False; fi
-	if [ $$(grep LDLIBS_TEST tmpsv | wc -l) -ne 1 ]; then \
-		echo "LDLIBS environment variable missed" && False; fi
-	@echo =================
-	@echo all custom variables detected
-	@echo =================
-	$(RM) tmpsv
+.PHONY: test_stdvars
+test_stdvars:  ## CI helper – verifies CC/CFLAGS/CPPFLAGS/LDFLAGS/LDLIBS propagation
+	@echo '--- standard-variable propagation test ---'
+	@$(RM) .stdvars.log
+
+	@$(MAKE) -rn V=1 \
+	    CC='cc -DCC_TEST' \
+	    CFLAGS='-DCFLAGS_TEST' \
+	    CPPFLAGS='-DCPPFLAGS_TEST' \
+	    LDFLAGS='-DLDFLAGS_TEST' \
+	    LDLIBS='-DLDLIBS_TEST' \
+	  | tee .stdvars.log >/dev/null
+
+	@tests/check_stdvars.sh .stdvars.log
+	@$(RM) .stdvars.log
 
 endif   # MSYS POSIX

NEWS

@@ -1,3 +1,27 @@
+v1.10.0
+cli  : multithreading compression support: improves speed by X times threads allocated
+cli  : overlap decompression with i/o, improving speed by ~+60%
+cli  : support environment variables LZ4_CLEVEL and LZ4_NBWORKERS
+cli  : license of CLI more clearly labelled GPL-2.0-or-later
+cli  : fix: refuse to compress directories
+cli  : fix dictionary compression benchmark on multiple files
+cli  : change: no more implicit `stdout` (except when input is `stdin`)
+lib  : new level 2, offering mid-way performance (speed and compression)
+lib  : Improved lz4frame compression speed for small data (up to +160% at 1KB)
+lib  : Slightly faster (+5%) HC compression speed (levels 3-9), by @JunHe77
+lib  : dictionary compression support now in stable status
+lib  : lz4frame states can be safely reset and reused after a processing error (described by @QrczakMK)
+lib  : `lz4file` API improvements, by @vsolontsov-volant and @t-mat
+lib  : new experimental symbol `LZ4_compress_destSize_extState()`
+build: cmake minimum version raised to 3.5
+build: cmake improvements, by @foxeng, @Ohjurot, @LocalSpook, @teo-tsirpanis, @ur4t and @t-mat
+build: meson scripts are now hosted into `build/` directory, by @eli-schwartz
+build: meson improvements, by @tristan957
+build: Visual Studio solutions generated by `cmake` via scripts
+port : support for loongArch, risc-v, m68k, mips and sparc architectures
+port : improved Visual Studio compatibility, by @t-mat
+port : freestanding support improvements, by @t-mat
+
 v1.9.4
 perf : faster decoding speed (~+20%) on aarch64 platforms
 perf : faster decoding speed (~+70%) for -BD4 setting in CLI
@@ -9,6 +33,7 @@ api  : new experimental function `LZ4F_uncompressedUpdate()`, by @alexmohr
 cli  : `--list` works on `stdin` input, by @Low-power
 cli  : `--no-crc` does not produce (compression) nor check (decompression) checksums
 cli  : fix: `--test` and `--list` produce an error code when parsing invalid input
+cli  : fix: `--test -m` does no longer create decompressed file artifacts
 cli  : fix: support skippable frames when passed via `stdin`, reported by @davidmankin
 build: fix: Makefile respects CFLAGS directives passed via environment variable
 build: `LZ4_FREESTANDING`, new build macro for freestanding environments, by @t-mat

README.md

@@ -20,20 +20,9 @@ It can ingest any input file as dictionary, though only the final 64KB are used.
 This capability can be combined with the [Zstandard Dictionary Builder](https://github.com/facebook/zstd/blob/v1.3.5/programs/zstd.1.md#dictionary-builder),
 in order to drastically improve compression performance on small files.
 
-
 LZ4 library is provided as open-source software using BSD 2-Clause license.
 
 
-|Branch      |Status   |
-|------------|---------|
-|dev         | [![Build Status][travisDevBadge]][travisLink]    [![Build status][AppveyorDevBadge]][AppveyorLink]                                         |
-
-[travisDevBadge]: https://travis-ci.org/lz4/lz4.svg?branch=dev "Continuous Integration test suite"
-[travisLink]: https://travis-ci.org/lz4/lz4
-[AppveyorDevBadge]: https://ci.appveyor.com/api/projects/status/github/lz4/lz4?branch=dev&svg=true "Windows test suite"
-[AppveyorLink]: https://ci.appveyor.com/project/YannCollet/lz4-1lndh
-
-
 Benchmarks
 -------------------------
 
@@ -46,7 +35,7 @@ in single-thread mode.
 [lzbench]: https://github.com/inikep/lzbench
 [Silesia Corpus]: http://sun.aei.polsl.pl/~sdeor/index.php?page=silesia
 
-|  Compressor             | Ratio   | Compression | Decompression |
+|  Compressor             | Factor  | Compression | Decompression |
 |  ----------             | -----   | ----------- | ------------- |
 |  memcpy                 |  1.000  | 13700 MB/s  |  13700 MB/s   |
 |**LZ4 default (v1.9.0)** |**2.101**| **780 MB/s**| **4970 MB/s** |
@@ -62,9 +51,6 @@ in single-thread mode.
 [zlib]: http://www.zlib.net/
 [Zstandard]: http://www.zstd.net/
 
-LZ4 is also compatible and optimized for x32 mode,
-for which it provides additional speed performance.
-
 
 Installation
 -------------------------
@@ -91,7 +77,7 @@ You can download and install LZ4 using the [vcpkg](https://github.com/Microsoft/
     cd vcpkg
     ./bootstrap-vcpkg.sh
     ./vcpkg integrate install
-    vcpkg install lz4
+    ./vcpkg.exe install lz4
 
 The LZ4 port in vcpkg is kept up to date by Microsoft team members and community contributors. If the version is out of date, please [create an issue or pull request](https://github.com/Microsoft/vcpkg) on the vcpkg repository.
 
@@ -118,3 +104,16 @@ many contributors have created versions of lz4 in multiple languages
 A list of known source ports is maintained on the [LZ4 Homepage].
 
 [LZ4 Homepage]: http://www.lz4.org
+
+### Packaging status
+
+Most distributions are bundled with a package manager
+which allows easy installation of both the `liblz4` library
+and the `lz4` command line interface.
+
+[![Packaging status](https://repology.org/badge/vertical-allrepos/lz4.svg?columns=4&exclude_unsupported=1)](https://repology.org/project/lz4/versions)
+
+
+### Special Thanks
+
+- Takayuki Matsuoka, aka @t-mat, for exceptional first-class support throughout the lifetime of this project

SECURITY.md

@@ -0,0 +1,17 @@
+# Security Policy
+
+If you have discovered a security vulnerability in this project, please report it
+privately. **Do not disclose it as a public issue.** This gives me time to work with you
+to fix the issue before public exposure, reducing the chance that the exploit will be
+used before a patch is released.
+
+Please submit the report by filling out
+[this form](https://github.com/lz4/lz4/security/advisories/new).
+
+Please provide the following information in your report:
+
+- A description of the vulnerability and its impact
+- How to reproduce the issue
+
+This project is maintained by a single maintainer on a reasonable-effort basis. As such,
+I ask that you give me 90 days to work on a fix before public exposure.

appveyor.yml

@@ -1,147 +1,87 @@
 version: 1.0.{build}
+
+# Test matrix: MinGW compilers only (Visual Studio testing moved to GitHub Actions)
 environment:
   matrix:
-  - COMPILER: "gcc"
-    PLATFORM: "mingw64"
-  - COMPILER: "gcc"
-    PLATFORM: "mingw32"
-  - COMPILER: "visual"
-    CONFIGURATION: "Debug"
-    PLATFORM: "x64"
-  - COMPILER: "visual"
-    CONFIGURATION: "Debug"
-    PLATFORM: "Win32"
-  - COMPILER: "visual"
-    CONFIGURATION: "Release"
-    PLATFORM: "x64"
-  - COMPILER: "visual"
-    CONFIGURATION: "Release"
-    PLATFORM: "Win32"
-  - COMPILER: "gcc"
-    PLATFORM: "clang"
+    - COMPILER: gcc
+      PLATFORM: mingw32
+    - COMPILER: gcc
+      PLATFORM: mingw64
+    - COMPILER: clang
+      PLATFORM: mingw64
 
 install:
-  - ECHO Installing %COMPILER% %PLATFORM% %CONFIGURATION%
-  - MKDIR bin
-  - if [%COMPILER%]==[gcc] SET PATH_ORIGINAL=%PATH%
-  - if [%COMPILER%]==[gcc] (
-      SET "PATH_MINGW32=c:\MinGW\bin;c:\MinGW\usr\bin" &&
-      SET "PATH_MINGW64=c:\msys64\mingw64\bin;c:\msys64\usr\bin" &&
-      COPY C:\MinGW\bin\mingw32-make.exe C:\MinGW\bin\make.exe &&
-      COPY C:\MinGW\bin\gcc.exe C:\MinGW\bin\cc.exe
-    ) else (
-      IF [%PLATFORM%]==[x64] (SET ADDITIONALPARAM=/p:LibraryPath="C:\Program Files\Microsoft SDKs\Windows\v7.1\lib\x64;c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\lib\amd64;C:\Program Files (x86)\Microsoft Visual Studio 10.0\;C:\Program Files (x86)\Microsoft Visual Studio 10.0\lib\amd64;")
-    )
+  - echo Installing %COMPILER% %PLATFORM%
+  - mkdir bin
+  # Setup MinGW environment
+  - set "PATH_MINGW32=c:\MinGW\bin;c:\MinGW\usr\bin"
+  - set "PATH_MINGW64=c:\msys64\mingw64\bin;c:\msys64\usr\bin"
+  - copy C:\MinGW\bin\mingw32-make.exe C:\MinGW\bin\make.exe >nul 2>&1
+  - copy C:\MinGW\bin\gcc.exe C:\MinGW\bin\cc.exe >nul 2>&1
 
 build_script:
-  - if [%PLATFORM%]==[mingw32] SET PATH=%PATH_MINGW32%;%PATH_ORIGINAL%
-  - if [%PLATFORM%]==[mingw64] SET PATH=%PATH_MINGW64%;%PATH_ORIGINAL%
-  - if [%PLATFORM%]==[clang] SET PATH=%PATH_MINGW64%;%PATH_ORIGINAL%
-  - ECHO *** &&
-      ECHO Building %COMPILER% %PLATFORM% %CONFIGURATION% &&
-      ECHO ***
-  - if [%PLATFORM%]==[clang] (clang -v)
-  - if [%COMPILER%]==[gcc] (gcc -v)
+  - echo "*** Building %COMPILER% %PLATFORM% ***"
+  # Configure PATH for MinGW builds
+  - if [%PLATFORM%]==[mingw32] set PATH=%PATH_MINGW32%;%PATH%
+  - if [%PLATFORM%]==[mingw64] set PATH=%PATH_MINGW64%;%PATH%
+
+  # GCC Build
   - if [%COMPILER%]==[gcc] (
-      echo ----- &&
+      echo "GCC build started" &&
+      gcc -v &&
       make -v &&
-      echo ----- &&
-      if not [%PLATFORM%]==[clang] (
-        make -C programs lz4 &&
-        make -C tests fullbench &&
-        make -C tests fuzzer &&
-        make -C lib lib V=1
-      ) ELSE (
-        make -C programs lz4 CC=clang MOREFLAGS="--target=x86_64-w64-mingw32 -Werror -Wconversion -Wno-sign-conversion" &&
-        make -C tests fullbench CC=clang MOREFLAGS="--target=x86_64-w64-mingw32 -Werror -Wconversion -Wno-sign-conversion" &&
-        make -C tests fuzzer CC=clang MOREFLAGS="--target=x86_64-w64-mingw32 -Werror -Wconversion -Wno-sign-conversion" &&
-        make -C lib lib CC=clang MOREFLAGS="--target=x86_64-w64-mingw32 -Werror -Wconversion -Wno-sign-conversion"
-      )
-    )
-  - if [%COMPILER%]==[gcc] if not [%PLATFORM%]==[clang] (
-      MKDIR bin\dll bin\static bin\example bin\include &&
-      COPY tests\fullbench.c bin\example\ &&
-      COPY lib\xxhash.c bin\example\ &&
-      COPY lib\xxhash.h bin\example\ &&
-      COPY lib\lz4.h bin\include\ &&
-      COPY lib\lz4hc.h bin\include\ &&
-      COPY lib\lz4frame.h bin\include\ &&
-      COPY lib\liblz4.a bin\static\liblz4_static.lib &&
-      COPY lib\dll\* bin\dll\ &&
-      COPY lib\dll\example\Makefile bin\example\ &&
-      COPY lib\dll\example\fullbench-dll.* bin\example\ &&
-      COPY lib\dll\example\README.md bin\ &&
-      COPY programs\lz4.exe bin\lz4.exe
-    )
-  - if [%COMPILER%]==[gcc] if [%PLATFORM%]==[mingw64] (
-      7z.exe a -bb1 bin\lz4_x64.zip NEWS .\bin\lz4.exe .\bin\README.md .\bin\example .\bin\dll .\bin\static .\bin\include &&
-      appveyor PushArtifact bin\lz4_x64.zip
-    )
-  - if [%COMPILER%]==[gcc] if [%PLATFORM%]==[mingw32] (
-      7z.exe a -bb1 bin\lz4_x86.zip NEWS .\bin\lz4.exe .\bin\README.md .\bin\example .\bin\dll .\bin\static .\bin\include &&
-      appveyor PushArtifact bin\lz4_x86.zip
-    )
-  - if [%COMPILER%]==[gcc] (COPY tests\*.exe programs\)
-  - if [%COMPILER%]==[visual] (
-      ECHO *** &&
-      ECHO *** Building Visual Studio 2010 %PLATFORM%\%CONFIGURATION% &&
-      ECHO *** &&
-      msbuild "build\VS2010\lz4.sln" %ADDITIONALPARAM% /m /verbosity:minimal /property:PlatformToolset=v100 /t:Clean,Build /p:Platform=%PLATFORM% /p:Configuration=%CONFIGURATION% /p:EnableWholeProgramOptimization=true /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll" &&
-      ECHO *** &&
-      ECHO *** Building Visual Studio 2012 %PLATFORM%\%CONFIGURATION% &&
-      ECHO *** &&
-      msbuild "build\VS2010\lz4.sln" /m /verbosity:minimal /property:PlatformToolset=v110 /t:Clean,Build /p:Platform=%PLATFORM% /p:Configuration=%CONFIGURATION% /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll" &&
-      ECHO *** &&
-      ECHO *** Building Visual Studio 2013 %PLATFORM%\%CONFIGURATION% &&
-      ECHO *** &&
-      msbuild "build\VS2010\lz4.sln" /m /verbosity:minimal /property:PlatformToolset=v120 /t:Clean,Build /p:Platform=%PLATFORM% /p:Configuration=%CONFIGURATION% /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll" &&
-      ECHO *** &&
-      ECHO *** Building Visual Studio 2015 %PLATFORM%\%CONFIGURATION% &&
-      ECHO *** &&
-      msbuild "build\VS2010\lz4.sln" /m /verbosity:minimal /property:PlatformToolset=v140 /t:Clean,Build /p:Platform=%PLATFORM% /p:Configuration=%CONFIGURATION% /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll" &&
-      COPY build\VS2010\bin\%PLATFORM%_%CONFIGURATION%\*.exe programs\
+      make -j -C programs lz4 V=1 &&
+      make -j -C tests fullbench V=1 &&
+      make -j -C tests fuzzer V=1 &&
+      make -j -C lib lib V=1 LDFLAGS="-static-libgcc" &&
+      echo "Packaging GCC build..." &&
+      mkdir bin\dll bin\static bin\example bin\include &&
+      copy tests\fullbench.c bin\example\ &&
+      copy lib\xxhash.* bin\example\ &&
+      copy lib\lz4*.h bin\include\ &&
+      copy lib\liblz4.a bin\static\liblz4_static.lib &&
+      copy lib\liblz4.dll.a bin\dll\ >nul 2>&1 &&
+      (copy lib\liblz4.dll bin\dll\ 2>nul || copy lib\msys-lz4-1.dll bin\dll\liblz4.dll 2>nul || copy lib\cyglz4-1.dll bin\dll\liblz4.dll 2>nul || echo DLL copy warning) &&
+      copy lib\dll\example\* bin\example\ >nul 2>&1 &&
+      copy programs\lz4.exe bin\lz4.exe &&
+      copy tests\*.exe programs\
     )
 
-test_script:
-  - ECHO *** &&
-      ECHO Testing %COMPILER% %PLATFORM% %CONFIGURATION% &&
-      ECHO ***
-  - if not [%COMPILER%]==[unknown] (
-      CD programs &&
-      lz4 -h &&
-      lz4 -i1b lz4.exe &&
-      lz4 -i1b5 lz4.exe &&
-      lz4 -i1b10 lz4.exe &&
-      lz4 -i1b15 lz4.exe &&
-      echo ------- lz4 tested ------- &&
-      fullbench.exe -i1 fullbench.exe &&
-      echo trying to launch fuzzer.exe &&
-      fuzzer.exe -v -T30s
+  # Clang Build
+  - if [%COMPILER%]==[clang] (
+      echo "Clang build started" &&
+      clang -v &&
+      make -v &&
+      set "CFLAGS=--target=x86_64-w64-mingw32 -Werror -Wconversion -Wno-sign-conversion" &&
+      make -j -C programs lz4 CC=clang V=1 &&
+      make -j -C tests fullbench CC=clang V=1 &&
+      make -j -C tests fuzzer CC=clang V=1 &&
+      make -j -C lib lib CC=clang V=1 &&
+      copy tests\*.exe programs\
     )
 
+  # Create release archives (GCC only)
+  - if [%COMPILER%]==[gcc] if [%PLATFORM%]==[mingw64] 7z.exe a -bb1 bin\lz4_x64.zip NEWS .\bin\lz4.exe README.md .\bin\example .\bin\dll .\bin\static .\bin\include
+  - if [%COMPILER%]==[gcc] if [%PLATFORM%]==[mingw64] appveyor PushArtifact bin\lz4_x64.zip
+  - if [%COMPILER%]==[gcc] if [%PLATFORM%]==[mingw32] 7z.exe a -bb1 bin\lz4_x86.zip NEWS .\bin\lz4.exe README.md .\bin\example .\bin\dll .\bin\static .\bin\include
+  - if [%COMPILER%]==[gcc] if [%PLATFORM%]==[mingw32] appveyor PushArtifact bin\lz4_x86.zip
+
+test_script:
+  - echo "*** Testing %COMPILER% %PLATFORM% ***"
+  - cd programs
+  - lz4 -h
+  - lz4 -i1b lz4.exe
+  - lz4 -i1b5 lz4.exe
+  - lz4 -i1b10 lz4.exe
+  - lz4 -i1b15 lz4.exe
+  - echo "------- lz4 tested -------"
+  - fullbench.exe -i0 fullbench.exe
+  - echo "Launching fuzzer test..."
+  - fuzzer.exe -v -T20s
+  - cd ..
+
 artifacts:
   - path: bin\lz4_x64.zip
+    name: LZ4 Windows x64 Build
   - path: bin\lz4_x86.zip
-
-deploy:
-- provider: GitHub
-  artifact: bin\lz4_x64.zip
-  auth_token:
-    secure: w6UJaGie0qbZvffr/fqyhO/Vj8rMiQWnv9a8qm3gxfngdHDTMT42wYupqJpIExId
-  force_update: true
-  prerelease: true
-  on:
-    COMPILER: gcc
-    PLATFORM: "mingw64"
-    appveyor_repo_tag: true
-
-- provider: GitHub
-  artifact: bin\lz4_x86.zip
-  auth_token:
-    secure: w6UJaGie0qbZvffr/fqyhO/Vj8rMiQWnv9a8qm3gxfngdHDTMT42wYupqJpIExId
-  force_update: true
-  prerelease: true
-  on:
-    COMPILER: gcc
-    PLATFORM: "mingw32"
-    appveyor_repo_tag: true
+    name: LZ4 Windows x86 Build

build/.gitignore

@@ -9,8 +9,10 @@
 ver*/
 VS2010/bin/
 VS2017/bin/
+VS*/bin/
 ipch
 
 # Fixup for lz4 project directories
 !VS2010/lz4
 !VS2017/lz4
+!VS*/lz4

build/README.md

@@ -5,23 +5,12 @@ Projects for various integrated development environments (IDE)
 
 The following projects are included with the lz4 distribution:
 - `cmake` - CMake project
-- `VS2010` - Visual Studio 2010 project (which also works well with Visual Studio 2012, 2013, 2015)
-- `VS2017` - Visual Studio 2017 project
+- `meson` - Meson project
+- `visual` - scripts to generate Visual Studio solutions from `cmake` script
+- `VS2022` - Visual Studio 2022 solution - will soon be deprecated, prefer `visual` generators
 
 
-#### How to compile lz4 with Visual Studio
-
-1. Install Visual Studio e.g. VS 2015 Community Edition (it's free).
-2. Download the latest version of lz4 from https://github.com/lz4/lz4/releases
-3. Decompress ZIP archive.
-4. Go to decompressed directory then to `build` then `VS2010` and open `lz4.sln`
-5. Visual Studio will ask about converting VS2010 project to VS2015 and you should agree.
-6. Change `Debug` to `Release` and if you have 64-bit Windows change also `Win32` to `x64`.
-7. Press F7 on keyboard or select `BUILD` from the menu bar and choose `Build Solution`.
-8. If compilation will be fine a compiled executable will be in `build\VS2010\bin\x64_Release\lz4.exe`
-
-
-#### Projects available within lz4.sln
+#### Projects available within VS2022\lz4.sln
 
 The Visual Studio solution file `lz4.sln` contains many projects that will be compiled to the
 `build\VS2010\bin\$(Platform)_$(Configuration)` directory. For example `lz4` set to `x64` and

build/VS2010/datagen/datagen.vcxproj

@@ -1,169 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <ItemGroup Label="ProjectConfigurations">
-    <ProjectConfiguration Include="Debug|Win32">
-      <Configuration>Debug</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Debug|x64">
-      <Configuration>Debug</Configuration>
-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|Win32">
-      <Configuration>Release</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|x64">
-      <Configuration>Release</Configuration>
-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-  </ItemGroup>
-  <PropertyGroup Label="Globals">
-    <ProjectGuid>{D745AE2F-596A-403A-9B91-81A8C6779243}</ProjectGuid>
-    <Keyword>Win32Proj</Keyword>
-    <RootNamespace>datagen</RootNamespace>
-    <OutDir>$(SolutionDir)bin\$(Platform)_$(Configuration)\</OutDir>
-    <IntDir>$(SolutionDir)bin\obj\$(RootNamespace)_$(Platform)_$(Configuration)\</IntDir>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>true</UseDebugLibraries>
-    <CharacterSet>Unicode</CharacterSet>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>true</UseDebugLibraries>
-    <CharacterSet>Unicode</CharacterSet>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>false</UseDebugLibraries>
-    <CharacterSet>Unicode</CharacterSet>
-    <WholeProgramOptimization Condition="'$(EnableWholeProgramOptimization)'=='true'">true</WholeProgramOptimization>
-  </PropertyGroup>
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- FILEFLAGS VS_FF_DEBUG
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- FILEFLAGS 0x0L
-#endif
- FILEOS VOS_NT_WINDOWS32
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- FILESUBTYPE VFT2_UNKNOWN
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-    BEGIN
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-            VALUE "ProductName", "LZ4"
-            VALUE "ProductVersion", LZ4_VERSION_STRING
-        END
-    END
-    BLOCK "VarFileInfo"
-    BEGIN
-        VALUE "Translation", 0x0409, 1200
-    END
-END
-
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-  </ItemDefinitionGroup>
-  <ItemGroup>
-    <ClInclude Include="..\..\..\lib\lz4.h" />
-    <ClInclude Include="..\..\..\lib\lz4frame.h" />
-    <ClInclude Include="..\..\..\lib\lz4frame_static.h" />
-    <ClInclude Include="..\..\..\lib\lz4hc.h" />
-    <ClInclude Include="..\..\..\lib\xxhash.h" />
-  </ItemGroup>
-  <ItemGroup>
-    <ClCompile Include="..\..\..\lib\lz4.c" />
-    <ClCompile Include="..\..\..\lib\lz4frame.c" />
-    <ClCompile Include="..\..\..\lib\lz4hc.c" />
-    <ClCompile Include="..\..\..\lib\xxhash.c" />
-  </ItemGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
-  <ImportGroup Label="ExtensionTargets">
-  </ImportGroup>
-</Project>

build/VS2017/lz4.sln

@@ -1,103 +0,0 @@
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.28307.271
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "liblz4-dll", "liblz4-dll\liblz4-dll.vcxproj", "{9800039D-4AAA-43A4-BB78-FEF6F4836927}"
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "liblz4", "liblz4\liblz4.vcxproj", "{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}"
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "fuzzer", "fuzzer\fuzzer.vcxproj", "{18B9F1A7-9C66-4352-898B-30804DADE0FD}"
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "fullbench", "fullbench\fullbench.vcxproj", "{6A4DF4EF-C77F-43C6-8901-DDCD20879E4E}"
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "frametest", "frametest\frametest.vcxproj", "{39AD6ECC-8BAD-4368-95E4-A1AA2F077BB7}"
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "datagen", "datagen\datagen.vcxproj", "{D745AE2F-596A-403A-9B91-81A8C6779243}"
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "fullbench-dll", "fullbench-dll\fullbench-dll.vcxproj", "{13992FD2-077E-4954-B065-A428198201A9}"
-	ProjectSection(ProjectDependencies) = postProject
-		{9800039D-4AAA-43A4-BB78-FEF6F4836927} = {9800039D-4AAA-43A4-BB78-FEF6F4836927}
-	EndProjectSection
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "lz4", "lz4\lz4.vcxproj", "{60A3115E-B988-41EE-8815-F4D4F253D866}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Win32 = Debug|Win32
-		Debug|x64 = Debug|x64
-		Release|Win32 = Release|Win32
-		Release|x64 = Release|x64
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{9800039D-4AAA-43A4-BB78-FEF6F4836927}.Debug|Win32.ActiveCfg = Debug|Win32
-		{9800039D-4AAA-43A4-BB78-FEF6F4836927}.Debug|Win32.Build.0 = Debug|Win32
-		{9800039D-4AAA-43A4-BB78-FEF6F4836927}.Debug|x64.ActiveCfg = Debug|x64
-		{9800039D-4AAA-43A4-BB78-FEF6F4836927}.Debug|x64.Build.0 = Debug|x64
-		{9800039D-4AAA-43A4-BB78-FEF6F4836927}.Release|Win32.ActiveCfg = Release|Win32
-		{9800039D-4AAA-43A4-BB78-FEF6F4836927}.Release|Win32.Build.0 = Release|Win32
-		{9800039D-4AAA-43A4-BB78-FEF6F4836927}.Release|x64.ActiveCfg = Release|x64
-		{9800039D-4AAA-43A4-BB78-FEF6F4836927}.Release|x64.Build.0 = Release|x64
-		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}.Debug|Win32.ActiveCfg = Debug|Win32
-		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}.Debug|Win32.Build.0 = Debug|Win32
-		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}.Debug|x64.ActiveCfg = Debug|x64
-		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}.Debug|x64.Build.0 = Debug|x64
-		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}.Release|Win32.ActiveCfg = Release|Win32
-		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}.Release|Win32.Build.0 = Release|Win32
-		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}.Release|x64.ActiveCfg = Release|x64
-		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}.Release|x64.Build.0 = Release|x64
-		{18B9F1A7-9C66-4352-898B-30804DADE0FD}.Debug|Win32.ActiveCfg = Debug|Win32
-		{18B9F1A7-9C66-4352-898B-30804DADE0FD}.Debug|Win32.Build.0 = Debug|Win32
-		{18B9F1A7-9C66-4352-898B-30804DADE0FD}.Debug|x64.ActiveCfg = Debug|x64
-		{18B9F1A7-9C66-4352-898B-30804DADE0FD}.Debug|x64.Build.0 = Debug|x64
-		{18B9F1A7-9C66-4352-898B-30804DADE0FD}.Release|Win32.ActiveCfg = Release|Win32
-		{18B9F1A7-9C66-4352-898B-30804DADE0FD}.Release|Win32.Build.0 = Release|Win32
-		{18B9F1A7-9C66-4352-898B-30804DADE0FD}.Release|x64.ActiveCfg = Release|x64
-		{18B9F1A7-9C66-4352-898B-30804DADE0FD}.Release|x64.Build.0 = Release|x64
-		{6A4DF4EF-C77F-43C6-8901-DDCD20879E4E}.Debug|Win32.ActiveCfg = Debug|Win32
-		{6A4DF4EF-C77F-43C6-8901-DDCD20879E4E}.Debug|Win32.Build.0 = Debug|Win32
-		{6A4DF4EF-C77F-43C6-8901-DDCD20879E4E}.Debug|x64.ActiveCfg = Debug|x64
-		{6A4DF4EF-C77F-43C6-8901-DDCD20879E4E}.Debug|x64.Build.0 = Debug|x64
-		{6A4DF4EF-C77F-43C6-8901-DDCD20879E4E}.Release|Win32.ActiveCfg = Release|Win32
-		{6A4DF4EF-C77F-43C6-8901-DDCD20879E4E}.Release|Win32.Build.0 = Release|Win32
-		{6A4DF4EF-C77F-43C6-8901-DDCD20879E4E}.Release|x64.ActiveCfg = Release|x64
-		{6A4DF4EF-C77F-43C6-8901-DDCD20879E4E}.Release|x64.Build.0 = Release|x64
-		{39AD6ECC-8BAD-4368-95E4-A1AA2F077BB7}.Debug|Win32.ActiveCfg = Debug|Win32
-		{39AD6ECC-8BAD-4368-95E4-A1AA2F077BB7}.Debug|Win32.Build.0 = Debug|Win32
-		{39AD6ECC-8BAD-4368-95E4-A1AA2F077BB7}.Debug|x64.ActiveCfg = Debug|x64
-		{39AD6ECC-8BAD-4368-95E4-A1AA2F077BB7}.Debug|x64.Build.0 = Debug|x64
-		{39AD6ECC-8BAD-4368-95E4-A1AA2F077BB7}.Release|Win32.ActiveCfg = Release|Win32
-		{39AD6ECC-8BAD-4368-95E4-A1AA2F077BB7}.Release|Win32.Build.0 = Release|Win32
-		{39AD6ECC-8BAD-4368-95E4-A1AA2F077BB7}.Release|x64.ActiveCfg = Release|x64
-		{39AD6ECC-8BAD-4368-95E4-A1AA2F077BB7}.Release|x64.Build.0 = Release|x64
-		{D745AE2F-596A-403A-9B91-81A8C6779243}.Debug|Win32.ActiveCfg = Debug|Win32
-		{D745AE2F-596A-403A-9B91-81A8C6779243}.Debug|Win32.Build.0 = Debug|Win32
-		{D745AE2F-596A-403A-9B91-81A8C6779243}.Debug|x64.ActiveCfg = Debug|x64
-		{D745AE2F-596A-403A-9B91-81A8C6779243}.Debug|x64.Build.0 = Debug|x64
-		{D745AE2F-596A-403A-9B91-81A8C6779243}.Release|Win32.ActiveCfg = Release|Win32
-		{D745AE2F-596A-403A-9B91-81A8C6779243}.Release|Win32.Build.0 = Release|Win32
-		{D745AE2F-596A-403A-9B91-81A8C6779243}.Release|x64.ActiveCfg = Release|x64
-		{D745AE2F-596A-403A-9B91-81A8C6779243}.Release|x64.Build.0 = Release|x64
-		{13992FD2-077E-4954-B065-A428198201A9}.Debug|Win32.ActiveCfg = Debug|Win32
-		{13992FD2-077E-4954-B065-A428198201A9}.Debug|Win32.Build.0 = Debug|Win32
-		{13992FD2-077E-4954-B065-A428198201A9}.Debug|x64.ActiveCfg = Debug|x64
-		{13992FD2-077E-4954-B065-A428198201A9}.Debug|x64.Build.0 = Debug|x64
-		{13992FD2-077E-4954-B065-A428198201A9}.Release|Win32.ActiveCfg = Release|Win32
-		{13992FD2-077E-4954-B065-A428198201A9}.Release|Win32.Build.0 = Release|Win32
-		{13992FD2-077E-4954-B065-A428198201A9}.Release|x64.ActiveCfg = Release|x64
-		{13992FD2-077E-4954-B065-A428198201A9}.Release|x64.Build.0 = Release|x64
-		{60A3115E-B988-41EE-8815-F4D4F253D866}.Debug|Win32.ActiveCfg = Debug|Win32
-		{60A3115E-B988-41EE-8815-F4D4F253D866}.Debug|Win32.Build.0 = Debug|Win32
-		{60A3115E-B988-41EE-8815-F4D4F253D866}.Debug|x64.ActiveCfg = Debug|x64
-		{60A3115E-B988-41EE-8815-F4D4F253D866}.Debug|x64.Build.0 = Debug|x64
-		{60A3115E-B988-41EE-8815-F4D4F253D866}.Release|Win32.ActiveCfg = Release|Win32
-		{60A3115E-B988-41EE-8815-F4D4F253D866}.Release|Win32.Build.0 = Release|Win32
-		{60A3115E-B988-41EE-8815-F4D4F253D866}.Release|x64.ActiveCfg = Release|x64
-		{60A3115E-B988-41EE-8815-F4D4F253D866}.Release|x64.Build.0 = Release|x64
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-	GlobalSection(ExtensibilityGlobals) = postSolution
-		SolutionGuid = {BBC259B2-BABF-47CD-8A6A-7B8318A803AC}
-	EndGlobalSection
-EndGlobal

build/VS2017/lz4/lz4.rc

@@ -1,51 +0,0 @@
-// Microsoft Visual C++ generated resource script.
-//
-
-#include "lz4.h" /* LZ4_VERSION_STRING */
-#define APSTUDIO_READONLY_SYMBOLS
-#include "verrsrc.h"
-#undef APSTUDIO_READONLY_SYMBOLS
-
-
-#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
-LANGUAGE 9, 1
-
-/////////////////////////////////////////////////////////////////////////////
-//
-// Version
-//
-
-VS_VERSION_INFO     VERSIONINFO
-  FILEVERSION       LZ4_VERSION_MAJOR,LZ4_VERSION_MINOR,LZ4_VERSION_RELEASE,0
-  PRODUCTVERSION    LZ4_VERSION_MAJOR,LZ4_VERSION_MINOR,LZ4_VERSION_RELEASE,0
- FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
-#ifdef _DEBUG
- FILEFLAGS VS_FF_DEBUG
-#else
- FILEFLAGS 0x0L
-#endif
- FILEOS VOS_NT_WINDOWS32
- FILETYPE VFT_DLL
- FILESUBTYPE VFT2_UNKNOWN
-BEGIN
-    BLOCK "StringFileInfo"
-    BEGIN
-        BLOCK "040904B0"
-        BEGIN
-            VALUE "CompanyName", "Yann Collet"
-            VALUE "FileDescription", "Extremely fast compression"
-            VALUE "FileVersion", LZ4_VERSION_STRING
-            VALUE "InternalName", "lz4.exe"
-            VALUE "LegalCopyright", "Copyright (C) 2013-2020, Yann Collet"
-            VALUE "OriginalFilename", "lz4.exe"
-            VALUE "ProductName", "LZ4"
-            VALUE "ProductVersion", LZ4_VERSION_STRING
-        END
-    END
-    BLOCK "VarFileInfo"
-    BEGIN
-        VALUE "Translation", 0x0409, 1200
-    END
-END
-
-#endif

build/VS2022/_build.bat

@@ -0,0 +1,39 @@
+set /a errorno=1
+for /F "delims=#" %%E in ('"prompt #$E# & for %%E in (1) do rem"') do set "esc=%%E"
+
+rem https://docs.microsoft.com/visualstudio/msbuild/msbuild-command-line-reference
+
+set "sln=lz4.sln"
+
+@rem set "Configuration=Debug"
+@rem set "Platform=Win32"
+
+set "BIN=.\bin\!Platform!_!Configuration!"
+rmdir /S /Q "!BIN!" 2>nul
+echo msbuild "%sln%" /p:Configuration=!Configuration! /p:Platform=!Platform!
+msbuild "%sln%"                          ^
+        /nologo                          ^
+        /v:minimal                       ^
+        /m                               ^
+        /p:Configuration=!Configuration! ^
+        /p:Platform=!Platform!           ^
+        /t:Clean,Build                   ^
+        || goto :ERROR
+
+if not exist "!BIN!\datagen.exe"       ( echo FAIL: "!BIN!\datagen.exe"       && goto :ERROR )
+if not exist "!BIN!\frametest.exe"     ( echo FAIL: "!BIN!\frametest.exe"     && goto :ERROR )
+if not exist "!BIN!\fullbench-dll.exe" ( echo FAIL: "!BIN!\fullbench-dll.exe" && goto :ERROR )
+if not exist "!BIN!\fullbench.exe"     ( echo FAIL: "!BIN!\fullbench.exe"     && goto :ERROR )
+if not exist "!BIN!\fuzzer.exe"        ( echo FAIL: "!BIN!\fuzzer.exe"        && goto :ERROR )
+if not exist "!BIN!\liblz4.dll"        ( echo FAIL: "!BIN!\liblz4.dll"        && goto :ERROR )
+if not exist "!BIN!\liblz4.lib"        ( echo FAIL: "!BIN!\liblz4.lib"        && goto :ERROR )
+if not exist "!BIN!\liblz4_static.lib" ( echo FAIL: "!BIN!\liblz4_static.lib" && goto :ERROR )
+if not exist "!BIN!\lz4.exe"           ( echo FAIL: "!BIN!\lz4.exe"           && goto :ERROR )
+
+set /a errorno=0
+goto :END
+
+:ERROR
+
+:END
+exit /B %errorno%

build/VS2022/_setup.bat

@@ -0,0 +1,35 @@
+set /a errorno=1
+for /F "delims=#" %%E in ('"prompt #$E# & for %%E in (1) do rem"') do set "esc=%%E"
+
+rem https://github.com/Microsoft/vswhere
+rem https://github.com/microsoft/vswhere/wiki/Find-VC#batch
+
+set "vswhere=%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe"
+if not exist "%vswhere%" (
+  echo Failed to find "vswhere.exe".  Please install the latest version of Visual Studio.
+  goto :ERROR
+)
+
+set "InstallDir="
+for /f "usebackq tokens=*" %%i in (
+  `"%vswhere%" -latest                                                     ^
+               -products *                                                 ^
+               -requires Microsoft.VisualStudio.Component.VC.Tools.x86.x64 ^
+               -property installationPath`
+) do (
+  set "InstallDir=%%i"
+)
+if "%InstallDir%" == "" (
+  echo Failed to find Visual C++.  Please install the latest version of Visual C++.
+  goto :ERROR
+)
+
+call "%InstallDir%\VC\Auxiliary\Build\vcvars64.bat" || goto :ERROR
+
+set /a errorno=0
+goto :END
+
+:ERROR
+
+:END
+exit /B %errorno%

build/VS2022/_test.bat

@@ -0,0 +1,38 @@
+set /a errorno=1
+for /F "delims=#" %%E in ('"prompt #$E# & for %%E in (1) do rem"') do set "esc=%%E"
+
+@rem set "Configuration=Debug"
+@rem set "Platform=Win32"
+
+set "BIN=.\bin\!Platform!_!Configuration!"
+set "TEST_FILES=..\..\tests\COPYING"
+
+echo !BIN!\lz4 -h
+     !BIN!\lz4 -h	|| goto :ERROR
+
+echo !BIN!\lz4 -i1b
+     !BIN!\lz4 -i1b	|| goto :ERROR
+
+echo !BIN!\lz4 -i1b5
+     !BIN!\lz4 -i1b5	|| goto :ERROR
+
+echo !BIN!\lz4 -i1b10
+     !BIN!\lz4 -i1b10	|| goto :ERROR
+
+echo !BIN!\lz4 -i1b15
+     !BIN!\lz4 -i1b15	|| goto :ERROR
+     
+echo fullbench
+!BIN!\fullbench.exe --no-prompt -i1 %TEST_FILES%	|| goto :ERROR
+
+echo fuzzer
+!BIN!\fuzzer.exe -v -T30s				|| goto :ERROR
+
+
+set /a errorno=0
+goto :END
+
+:ERROR
+
+:END
+exit /B %errorno%

build/VS2022/build-and-test-win32-debug.bat

@@ -0,0 +1,26 @@
+@setlocal enabledelayedexpansion
+@echo off
+set /a errorno=1
+for /F "delims=#" %%E in ('"prompt #$E# & for %%E in (1) do rem"') do set "esc=%%E"
+
+call _setup.bat || goto :ERROR
+
+set "Configuration=Debug"
+set "Platform=Win32"
+
+call _build.bat || goto :ERROR
+call _test.bat  || goto :ERROR
+
+
+echo Build Status -%esc%[92m SUCCEEDED %esc%[0m
+set /a errorno=0
+goto :END
+
+
+:ERROR
+echo Abort by error.
+echo Build Status -%esc%[91m ERROR %esc%[0m
+
+
+:END
+exit /B %errorno%

build/VS2022/build-and-test-win32-release.bat

@@ -0,0 +1,26 @@
+@setlocal enabledelayedexpansion
+@echo off
+set /a errorno=1
+for /F "delims=#" %%E in ('"prompt #$E# & for %%E in (1) do rem"') do set "esc=%%E"
+
+call _setup.bat || goto :ERROR
+
+set "Configuration=Release"
+set "Platform=Win32"
+
+call _build.bat || goto :ERROR
+call _test.bat  || goto :ERROR
+
+
+echo Build Status -%esc%[92m SUCCEEDED %esc%[0m
+set /a errorno=0
+goto :END
+
+
+:ERROR
+echo Abort by error.
+echo Build Status -%esc%[91m ERROR %esc%[0m
+
+
+:END
+exit /B %errorno%

build/VS2022/build-and-test-x64-debug.bat

@@ -0,0 +1,26 @@
+@setlocal enabledelayedexpansion
+@echo off
+set /a errorno=1
+for /F "delims=#" %%E in ('"prompt #$E# & for %%E in (1) do rem"') do set "esc=%%E"
+
+call _setup.bat || goto :ERROR
+
+set "Configuration=Debug"
+set "Platform=x64"
+
+call _build.bat || goto :ERROR
+call _test.bat  || goto :ERROR
+
+
+echo Build Status -%esc%[92m SUCCEEDED %esc%[0m
+set /a errorno=0
+goto :END
+
+
+:ERROR
+echo Abort by error.
+echo Build Status -%esc%[91m ERROR %esc%[0m
+
+
+:END
+exit /B %errorno%

build/VS2022/build-and-test-x64-release.bat

@@ -0,0 +1,26 @@
+@setlocal enabledelayedexpansion
+@echo off
+set /a errorno=1
+for /F "delims=#" %%E in ('"prompt #$E# & for %%E in (1) do rem"') do set "esc=%%E"
+
+call _setup.bat || goto :ERROR
+
+set "Configuration=Release"
+set "Platform=x64"
+
+call _build.bat || goto :ERROR
+call _test.bat  || goto :ERROR
+
+
+echo Build Status -%esc%[92m SUCCEEDED %esc%[0m
+set /a errorno=0
+goto :END
+
+
+:ERROR
+echo Abort by error.
+echo Build Status -%esc%[91m ERROR %esc%[0m
+
+
+:END
+exit /B %errorno%

build/VS2022/datagen/datagen.vcxproj

@@ -161,13 +161,17 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
-    <ClCompile Include="..\..\..\programs\datagen.c" />
+    <ClCompile Include="..\..\..\programs\lorem.c" />
+    <ClCompile Include="..\..\..\tests\datagen.c" />
     <ClCompile Include="..\..\..\tests\datagencli.c" />
+    <ClCompile Include="..\..\..\tests\loremOut.c" />
   </ItemGroup>
   <ItemGroup>
-    <ClInclude Include="..\..\..\programs\datagen.h" />
+    <ClInclude Include="..\..\..\programs\lorem.h" />
+    <ClInclude Include="..\..\..\tests\datagen.h" />
+    <ClInclude Include="..\..\..\tests\loremOut.h" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>

build/VS2022/frametest/frametest.vcxproj

@@ -162,6 +162,7 @@
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClCompile Include="..\..\..\lib\lz4.c" />
+    <ClCompile Include="..\..\..\lib\lz4file.c" />
     <ClCompile Include="..\..\..\lib\lz4frame.c" />
     <ClCompile Include="..\..\..\lib\lz4hc.c" />
     <ClCompile Include="..\..\..\lib\xxhash.c" />
@@ -169,6 +170,7 @@
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\..\lib\lz4.h" />
+    <ClInclude Include="..\..\..\lib\lz4file.h" />
     <ClInclude Include="..\..\..\lib\lz4frame.h" />
     <ClInclude Include="..\..\..\lib\lz4frame_static.h" />
     <ClInclude Include="..\..\..\lib\lz4hc.h" />
@@ -177,4 +179,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>

build/VS2022/lz4.sln

@@ -1,6 +1,6 @@
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.28307.271
+# Visual Studio Version 17
+VisualStudioVersion = 17.6.33712.159
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "liblz4-dll", "liblz4-dll\liblz4-dll.vcxproj", "{9800039D-4AAA-43A4-BB78-FEF6F4836927}"
 EndProject
@@ -20,6 +20,9 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "fullbench-dll", "fullbench-
 	EndProjectSection
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "lz4", "lz4\lz4.vcxproj", "{60A3115E-B988-41EE-8815-F4D4F253D866}"
+	ProjectSection(ProjectDependencies) = postProject
+		{9092C5CC-3E71-41B3-BF68-4A7BDD8A5476} = {9092C5CC-3E71-41B3-BF68-4A7BDD8A5476}
+	EndProjectSection
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

build/VS2022/lz4/lz4.vcxproj

@@ -22,32 +22,32 @@
     <VCProjectVersion>15.0</VCProjectVersion>
     <ProjectGuid>{60A3115E-B988-41EE-8815-F4D4F253D866}</ProjectGuid>
     <RootNamespace>lz4</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>false</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v141</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
@@ -105,6 +105,8 @@
       <SubSystem>Console</SubSystem>
       <OptimizeReferences>false</OptimizeReferences>
       <EnableCOMDATFolding>false</EnableCOMDATFolding>
+      <AdditionalLibraryDirectories>$(ProjectDir)..\bin\$(Platform)_$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>liblz4_static.lib;$(CoreLibraryDependencies);%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
@@ -114,6 +116,10 @@
       <SDLCheck>true</SDLCheck>
       <ConformanceMode>true</ConformanceMode>
     </ClCompile>
+    <Link>
+      <AdditionalLibraryDirectories>$(ProjectDir)..\bin\$(Platform)_$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>liblz4_static.lib;$(CoreLibraryDependencies);%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <ClCompile>
@@ -130,6 +136,8 @@
       <OptimizeReferences>true</OptimizeReferences>
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <SubSystem>Console</SubSystem>
+      <AdditionalLibraryDirectories>$(ProjectDir)..\bin\$(Platform)_$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>liblz4_static.lib;$(CoreLibraryDependencies);%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
@@ -144,6 +152,8 @@
     <Link>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
+      <AdditionalLibraryDirectories>$(ProjectDir)..\bin\$(Platform)_$(Configuration);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalDependencies>liblz4_static.lib;$(CoreLibraryDependencies);%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
@@ -152,9 +162,12 @@
     <ClCompile Include="..\..\..\lib\lz4hc.c" />
     <ClCompile Include="..\..\..\lib\xxhash.c" />
     <ClCompile Include="..\..\..\programs\bench.c" />
-    <ClCompile Include="..\..\..\programs\datagen.c" />
+    <ClCompile Include="..\..\..\programs\lorem.c" />
     <ClCompile Include="..\..\..\programs\lz4cli.c" />
     <ClCompile Include="..\..\..\programs\lz4io.c" />
+    <ClCompile Include="..\..\..\programs\threadpool.c" />
+    <ClCompile Include="..\..\..\programs\timefn.c" />
+    <ClCompile Include="..\..\..\programs\util.c" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\..\lib\lz4.h" />
@@ -163,8 +176,9 @@
     <ClInclude Include="..\..\..\lib\lz4hc.h" />
     <ClInclude Include="..\..\..\lib\xxhash.h" />
     <ClInclude Include="..\..\..\programs\bench.h" />
-    <ClInclude Include="..\..\..\programs\datagen.h" />
+    <ClInclude Include="..\..\..\programs\lorem.h" />
     <ClInclude Include="..\..\..\programs\lz4io.h" />
+    <ClInclude Include="..\..\..\programs\util.h" />
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="lz4.rc" />

build/cmake/CMakeLists.txt

@@ -6,53 +6,69 @@
 # any warranty.
 #
 # For details, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-#
-# LZ4's CMake support is maintained by Evan Nemerson; when filing
-# bugs please mention @nemequ to make sure I see it.
 
-cmake_minimum_required(VERSION 2.8.12)
+
+# Use range version specification for policy control while maintaining 
+# compatibility with older CMake versions
+cmake_minimum_required(VERSION 3.5...4.0.2)
 
 set(LZ4_TOP_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../..")
 
-# Parse version information
-file(STRINGS "${LZ4_TOP_SOURCE_DIR}/lib/lz4.h" LZ4_VERSION_MAJOR REGEX "^#define LZ4_VERSION_MAJOR +([0-9]+) +.*$")
-string(REGEX REPLACE "^#define LZ4_VERSION_MAJOR +([0-9]+) +.*$" "\\1" LZ4_VERSION_MAJOR "${LZ4_VERSION_MAJOR}")
-file(STRINGS "${LZ4_TOP_SOURCE_DIR}/lib/lz4.h" LZ4_VERSION_MINOR REGEX "^#define LZ4_VERSION_MINOR +([0-9]+) +.*$")
-string(REGEX REPLACE "^#define LZ4_VERSION_MINOR +([0-9]+) +.*$" "\\1" LZ4_VERSION_MINOR "${LZ4_VERSION_MINOR}")
-file(STRINGS "${LZ4_TOP_SOURCE_DIR}/lib/lz4.h" LZ4_VERSION_RELEASE REGEX "^#define LZ4_VERSION_RELEASE +([0-9]+) +.*$")
-string(REGEX REPLACE "^#define LZ4_VERSION_RELEASE +([0-9]+) +.*$" "\\1" LZ4_VERSION_RELEASE "${LZ4_VERSION_RELEASE}")
+#-----------------------------------------------------------------------------
+# VERSION EXTRACTION - Parse version information from header file
+#-----------------------------------------------------------------------------
+function(parse_lz4_version VERSION_TYPE)
+    file(STRINGS "${LZ4_TOP_SOURCE_DIR}/lib/lz4.h" version_line REGEX "^#define LZ4_VERSION_${VERSION_TYPE} +([0-9]+).*$")
+    string(REGEX REPLACE "^#define LZ4_VERSION_${VERSION_TYPE} +([0-9]+).*$" "\\1" version_number "${version_line}")
+    set(LZ4_VERSION_${VERSION_TYPE} ${version_number} PARENT_SCOPE)
+endfunction()
+
+foreach(version_type IN ITEMS MAJOR MINOR RELEASE)
+    parse_lz4_version(${version_type})
+endforeach()
+
 set(LZ4_VERSION_STRING "${LZ4_VERSION_MAJOR}.${LZ4_VERSION_MINOR}.${LZ4_VERSION_RELEASE}")
 mark_as_advanced(LZ4_VERSION_STRING LZ4_VERSION_MAJOR LZ4_VERSION_MINOR LZ4_VERSION_RELEASE)
 
-if("${CMAKE_VERSION}" VERSION_LESS "3.0")
-  project(LZ4 C)
-else()
-  cmake_policy (SET CMP0048 NEW)
-  project(LZ4
-    VERSION ${LZ4_VERSION_STRING}
-    LANGUAGES C)
+message(STATUS "Creating build script for LZ4 version: ${LZ4_VERSION_STRING}")
+
+project(LZ4 VERSION ${LZ4_VERSION_STRING} LANGUAGES C)
+
+#-----------------------------------------------------------------------------
+# DEFAULT BUILD TYPE - Set Release as default when no build type is specified
+#-----------------------------------------------------------------------------
+# Set a default build type if none was specified
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+  message(STATUS "Setting build type to 'Release' as none was specified.")
+  set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build." FORCE)
+  # Set the possible values of build type for cmake-gui
+  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
+    "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
 endif()
 
+#-----------------------------------------------------------------------------
+# BUILD OPTIONS - Configure build targets and features
+#-----------------------------------------------------------------------------
 option(LZ4_BUILD_CLI "Build lz4 program" ON)
-option(LZ4_BUILD_LEGACY_LZ4C "Build lz4c program with legacy argument support" ON)
+option(LZ4_BUILD_LEGACY_LZ4C "Build lz4c program with legacy argument support" OFF)
 
-# If LZ4 is being bundled in another project, we don't want to
-# install anything.  However, we want to let people override this, so
-# we'll use the LZ4_BUNDLED_MODE variable to let them do that; just
-# set it to OFF in your project before you add_subdirectory(lz4/contrib/cmake_unofficial).
-get_directory_property(LZ4_PARENT_DIRECTORY PARENT_DIRECTORY)
-if("${LZ4_BUNDLED_MODE}" STREQUAL "")
-  # Bundled mode hasn't been set one way or the other, set the default
-  # depending on whether or not we are the top-level project.
-  if("${LZ4_PARENT_DIRECTORY}" STREQUAL "")
-    set(LZ4_BUNDLED_MODE OFF)
-  else()
+
+# Determine if LZ4 is being built as part of another project.
+# If LZ4 is bundled in another project, we don't want to install anything.
+# Default behavior can be overridden by setting the LZ4_BUNDLED_MODE variable.
+if(NOT DEFINED LZ4_BUNDLED_MODE)
+  get_directory_property(LZ4_IS_SUBPROJECT PARENT_DIRECTORY)
+  if(LZ4_IS_SUBPROJECT)
     set(LZ4_BUNDLED_MODE ON)
+  else()
+    set(LZ4_BUNDLED_MODE OFF)
   endif()
 endif()
 mark_as_advanced(LZ4_BUNDLED_MODE)
 
-# CPack
+#-----------------------------------------------------------------------------
+# PACKAGING - CPack configuration
+#-----------------------------------------------------------------------------
 if(NOT LZ4_BUNDLED_MODE AND NOT CPack_CMake_INCLUDED)
   set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "LZ4 compression library")
   set(CPACK_PACKAGE_DESCRIPTION_FILE "${LZ4_TOP_SOURCE_DIR}/README.md")
@@ -63,6 +79,9 @@ if(NOT LZ4_BUNDLED_MODE AND NOT CPack_CMake_INCLUDED)
   include(CPack)
 endif(NOT LZ4_BUNDLED_MODE AND NOT CPack_CMake_INCLUDED)
 
+#-----------------------------------------------------------------------------
+# LIBRARY TYPE CONFIGURATION - Static vs Shared libraries
+#-----------------------------------------------------------------------------
 # Allow people to choose whether to build shared or static libraries
 # via the BUILD_SHARED_LIBS option unless we are in bundled mode, in
 # which case we always use static libraries.
@@ -72,34 +91,42 @@ CMAKE_DEPENDENT_OPTION(BUILD_STATIC_LIBS "Build static libraries" OFF "BUILD_SHA
 
 if(NOT BUILD_SHARED_LIBS AND NOT BUILD_STATIC_LIBS)
   message(FATAL_ERROR "Both BUILD_SHARED_LIBS and BUILD_STATIC_LIBS have been disabled")
-endif()
+endif(NOT BUILD_SHARED_LIBS AND NOT BUILD_STATIC_LIBS)
 
+#-----------------------------------------------------------------------------
+# SOURCE FILES & DIRECTORIES - Path setup and source file collection
+#-----------------------------------------------------------------------------
 set(LZ4_LIB_SOURCE_DIR "${LZ4_TOP_SOURCE_DIR}/lib")
 set(LZ4_PROG_SOURCE_DIR "${LZ4_TOP_SOURCE_DIR}/programs")
 
 include_directories("${LZ4_LIB_SOURCE_DIR}")
 
 # CLI sources
-set(LZ4_SOURCES
-  "${LZ4_LIB_SOURCE_DIR}/lz4.c"
-  "${LZ4_LIB_SOURCE_DIR}/lz4hc.c"
-  "${LZ4_LIB_SOURCE_DIR}/lz4.h"
-  "${LZ4_LIB_SOURCE_DIR}/lz4hc.h"
-  "${LZ4_LIB_SOURCE_DIR}/lz4frame.c"
-  "${LZ4_LIB_SOURCE_DIR}/lz4frame.h"
-  "${LZ4_LIB_SOURCE_DIR}/xxhash.c")
-set(LZ4_CLI_SOURCES
-  "${LZ4_PROG_SOURCE_DIR}/bench.c"
-  "${LZ4_PROG_SOURCE_DIR}/lz4cli.c"
-  "${LZ4_PROG_SOURCE_DIR}/lz4io.c"
-  "${LZ4_PROG_SOURCE_DIR}/datagen.c")
+file(GLOB LZ4_SOURCES
+     "${LZ4_LIB_SOURCE_DIR}/*.c")
+file(GLOB LZ4_CLI_SOURCES
+     "${LZ4_PROG_SOURCE_DIR}/*.c")
+list(APPEND LZ4_CLI_SOURCES ${LZ4_SOURCES}) # LZ4_CLI always use liblz4 sources directly.
 
+#-----------------------------------------------------------------------------
+# POSITION INDEPENDENT CODE - PIC settings for static libraries
+#-----------------------------------------------------------------------------
 # Whether to use position independent code for the static library.  If
 # we're building a shared library this is ignored and PIC is always
 # used.
-option(LZ4_POSITION_INDEPENDENT_LIB "Use position independent code for static library (if applicable)" ON)
+if(NOT DEFINED CMAKE_POSITION_INDEPENDENT_CODE OR CMAKE_POSITION_INDEPENDENT_CODE)
+  set(LZ4_POSITION_INDEPENDENT_LIB_DEFAULT ON)
+else()
+  set(LZ4_POSITION_INDEPENDENT_LIB_DEFAULT OFF)
+endif(NOT DEFINED CMAKE_POSITION_INDEPENDENT_CODE OR CMAKE_POSITION_INDEPENDENT_CODE)
 
+option(LZ4_POSITION_INDEPENDENT_LIB "Use position independent code for static library (if applicable)" ${LZ4_POSITION_INDEPENDENT_LIB_DEFAULT})
+
+#-----------------------------------------------------------------------------
+# TARGETS - Library and executable targets
+#-----------------------------------------------------------------------------
 # liblz4
+include(GNUInstallDirs)
 set(LZ4_LIBRARIES_BUILT)
 if(BUILD_SHARED_LIBS)
   add_library(lz4_shared SHARED ${LZ4_SOURCES})
@@ -113,14 +140,14 @@ if(BUILD_SHARED_LIBS)
   if(MSVC)
     target_compile_definitions(lz4_shared PRIVATE
       LZ4_DLL_EXPORT=1)
-  endif()
+  endif(MSVC)
   list(APPEND LZ4_LIBRARIES_BUILT lz4_shared)
 endif()
 if(BUILD_STATIC_LIBS)
   set(STATIC_LIB_NAME lz4)
-  if (MSVC AND BUILD_SHARED_LIBS)
+  if(MSVC AND BUILD_SHARED_LIBS)
     set(STATIC_LIB_NAME lz4_static)
-  endif()
+  endif(MSVC AND BUILD_SHARED_LIBS)
   add_library(lz4_static STATIC ${LZ4_SOURCES})
   target_include_directories(lz4_static
     PUBLIC $<BUILD_INTERFACE:${LZ4_LIB_SOURCE_DIR}>
@@ -130,67 +157,113 @@ if(BUILD_STATIC_LIBS)
     POSITION_INDEPENDENT_CODE ${LZ4_POSITION_INDEPENDENT_LIB})
   list(APPEND LZ4_LIBRARIES_BUILT lz4_static)
 endif()
-
-if(BUILD_STATIC_LIBS)
-  set(LZ4_LINK_LIBRARY lz4_static)
+# Add unified target.
+add_library(lz4 INTERFACE)
+list(APPEND LZ4_LIBRARIES_BUILT lz4)
+if(BUILD_SHARED_LIBS)
+  target_link_libraries(lz4 INTERFACE lz4_shared)
 else()
-  list(APPEND LZ4_CLI_SOURCES ${LZ4_SOURCES})
+  target_link_libraries(lz4 INTERFACE lz4_static)
+endif(BUILD_SHARED_LIBS)
+
+#-----------------------------------------------------------------------------
+# DEBUG CONFIGURATION - Configurable LZ4_DEBUG level
+#-----------------------------------------------------------------------------
+# LZ4_DEBUG levels:
+# 0 - Disable everything (default for Release)
+# 1 - Enable assert() statements  
+# 2-8 - Enable debug traces with increasing verbosity
+if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+  set(LZ4_DEBUG_LEVEL_DEFAULT 1)
+else()
+  set(LZ4_DEBUG_LEVEL_DEFAULT 0)
 endif()
 
+set(LZ4_DEBUG_LEVEL ${LZ4_DEBUG_LEVEL_DEFAULT} CACHE STRING 
+    "LZ4 debug level: 0=disabled, 1=assert(), 2-8=debug traces with increasing verbosity")
+set_property(CACHE LZ4_DEBUG_LEVEL PROPERTY STRINGS "0" "1" "2" "3" "4" "5" "6" "7" "8")
+
+# Apply LZ4_DEBUG configuration if level > 0
+if(LZ4_DEBUG_LEVEL GREATER 0)
+  if(MSVC)
+    add_definitions(/DLZ4_DEBUG=${LZ4_DEBUG_LEVEL})
+  else()
+    add_definitions(-DLZ4_DEBUG=${LZ4_DEBUG_LEVEL})
+  endif()
+endif()
+
+#-----------------------------------------------------------------------------
+# NAMESPACE CONFIGURATION - xxHash namespace settings
+#-----------------------------------------------------------------------------
+# xxhash namespace
+if(BUILD_SHARED_LIBS)
+  target_compile_definitions(lz4_shared PRIVATE
+    XXH_NAMESPACE=LZ4_)
+endif(BUILD_SHARED_LIBS)
+if(BUILD_STATIC_LIBS)
+  target_compile_definitions(lz4_static PRIVATE
+    XXH_NAMESPACE=LZ4_)
+endif(BUILD_STATIC_LIBS)
+
+#-----------------------------------------------------------------------------
+# CLI EXECUTABLES - Configuring command-line programs
+#-----------------------------------------------------------------------------
 # lz4
-if (LZ4_BUILD_CLI)
+if(LZ4_BUILD_CLI)
   set(LZ4_PROGRAMS_BUILT lz4cli)
   add_executable(lz4cli ${LZ4_CLI_SOURCES})
   set_target_properties(lz4cli PROPERTIES OUTPUT_NAME lz4)
-  if (BUILD_STATIC_LIBS)
-    target_link_libraries(lz4cli ${LZ4_LINK_LIBRARY})
-  endif()
-endif()
+endif(LZ4_BUILD_CLI)
 
 # lz4c
-if (LZ4_BUILD_LEGACY_LZ4C)
+if(LZ4_BUILD_LEGACY_LZ4C)
   list(APPEND LZ4_PROGRAMS_BUILT lz4c)
   add_executable(lz4c ${LZ4_CLI_SOURCES})
   set_target_properties(lz4c PROPERTIES COMPILE_DEFINITIONS "ENABLE_LZ4C_LEGACY_OPTIONS")
-  if (BUILD_STATIC_LIBS)
-    target_link_libraries(lz4c ${LZ4_LINK_LIBRARY})
-  endif()
-endif()
+endif(LZ4_BUILD_LEGACY_LZ4C)
 
+#-----------------------------------------------------------------------------
+# COMPILER FLAGS - Configure warning flags and compiler-specific options
+#-----------------------------------------------------------------------------
 # Extra warning flags
-include (CheckCCompilerFlag)
-foreach (flag
-    # GCC-style
-    -Wall
-    -Wextra
-    -Wundef
-    -Wcast-qual
-    -Wcast-align
-    -Wshadow
-    -Wswitch-enum
-    -Wdeclaration-after-statement
-    -Wstrict-prototypes
-    -Wpointer-arith
+if(MSVC)
+  set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} /W4")
+else()
+  include(CheckCCompilerFlag)
+  foreach(flag
+      # GCC-style
+      -pedantic-errors
+      -Wall
+      -Wextra
+      -Wundef
+      -Wcast-qual
+      -Wcast-align
+      -Wshadow
+      -Wswitch-enum
+      -Wdeclaration-after-statement
+      -Wstrict-prototypes
+      -Wpointer-arith)
 
-    # MSVC-style
-    /W4)
-  # Because https://gcc.gnu.org/wiki/FAQ#wnowarning
-  string(REGEX REPLACE "\\-Wno\\-(.+)" "-W\\1" flag_to_test "${flag}")
-  string(REGEX REPLACE "[^a-zA-Z0-9]+" "_" test_name "CFLAG_${flag_to_test}")
+    # Because https://gcc.gnu.org/wiki/FAQ#wnowarning
+    string(REGEX REPLACE "\\-Wno\\-(.+)" "-W\\1" flag_to_test "${flag}")
+    string(REGEX REPLACE "[^a-zA-Z0-9]+" "_" test_name "CFLAG_${flag_to_test}")
 
-  check_c_compiler_flag("${ADD_COMPILER_FLAGS_PREPEND} ${flag_to_test}" ${test_name})
+    check_c_compiler_flag("${ADD_COMPILER_FLAGS_PREPEND} ${flag_to_test}" ${test_name})
 
-  if(${test_name})
-    set(CMAKE_C_FLAGS "${flag} ${CMAKE_C_FLAGS}")
-  endif()
+    if(${test_name})
+      set(CMAKE_C_FLAGS_DEBUG "${flag} ${CMAKE_C_FLAGS_DEBUG}")
+    endif()
 
-  unset(test_name)
-  unset(flag_to_test)
-endforeach (flag)
+    unset(test_name)
+    unset(flag_to_test)
+  endforeach(flag)
+endif(MSVC)
 
+
+#-----------------------------------------------------------------------------
+# INSTALLATION - Install targets, headers, and documentation
+#-----------------------------------------------------------------------------
 if(NOT LZ4_BUNDLED_MODE)
-  include(GNUInstallDirs)
-
   install(TARGETS ${LZ4_PROGRAMS_BUILT}
     BUNDLE	DESTINATION "${CMAKE_INSTALL_BINDIR}"
     RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")
@@ -201,14 +274,18 @@ if(NOT LZ4_BUNDLED_MODE)
     RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")
   install(FILES
     "${LZ4_LIB_SOURCE_DIR}/lz4.h"
-    "${LZ4_LIB_SOURCE_DIR}/lz4frame.h"
     "${LZ4_LIB_SOURCE_DIR}/lz4hc.h"
+    "${LZ4_LIB_SOURCE_DIR}/lz4frame.h"
+    "${LZ4_LIB_SOURCE_DIR}/lz4file.h"
     DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
   install(FILES "${LZ4_PROG_SOURCE_DIR}/lz4.1"
     DESTINATION "${CMAKE_INSTALL_MANDIR}/man1")
   install(FILES "${CMAKE_CURRENT_BINARY_DIR}/liblz4.pc"
     DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
 
+#-----------------------------------------------------------------------------
+# CMAKE PACKAGE CONFIG - Configure CMake package for find_package support
+#-----------------------------------------------------------------------------
   include(CMakePackageConfigHelpers)
   write_basic_package_version_file(
     "${CMAKE_CURRENT_BINARY_DIR}/lz4ConfigVersion.cmake"
@@ -233,16 +310,25 @@ if(NOT LZ4_BUNDLED_MODE)
       ${CMAKE_CURRENT_BINARY_DIR}/lz4ConfigVersion.cmake
     DESTINATION ${LZ4_PKG_INSTALLDIR})
 
-  # install lz4cat and unlz4 symlinks on *nix
+#-----------------------------------------------------------------------------
+# SYMLINKS - Create and install Unix symlinks and manpage aliases
+#-----------------------------------------------------------------------------
+  # Install lz4cat and unlz4 symlinks on Unix systems
   if(UNIX AND LZ4_BUILD_CLI)
-    install(CODE "
-      foreach(f lz4cat unlz4)
-        set(dest \"\$ENV{DESTDIR}${CMAKE_INSTALL_FULL_BINDIR}/\${f}\")
-        message(STATUS \"Symlinking: \${dest} -> lz4\")
-        execute_process(
-          COMMAND \"${CMAKE_COMMAND}\" -E create_symlink lz4 \"\${dest}\")
-      endforeach()
-    ")
+    foreach(cli_tool IN ITEMS lz4cat unlz4)
+      # Create a custom target for the symlink creation
+      add_custom_target("create_${cli_tool}_symlink" ALL
+        COMMAND ${CMAKE_COMMAND} -E create_symlink
+          $<TARGET_FILE_NAME:lz4cli> ${cli_tool}
+        DEPENDS lz4cli
+        COMMENT "Creating symlink for ${cli_tool}"
+        VERBATIM)
+
+      # Install the symlink into the binary installation directory
+      install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${cli_tool}"
+        DESTINATION ${CMAKE_INSTALL_BINDIR}
+        RENAME ${cli_tool})
+    endforeach()
 
     # create manpage aliases
     foreach(f lz4cat unlz4)
@@ -253,6 +339,9 @@ if(NOT LZ4_BUNDLED_MODE)
   endif(UNIX AND LZ4_BUILD_CLI)
 endif(NOT LZ4_BUNDLED_MODE)
 
+#-----------------------------------------------------------------------------
+# PKG-CONFIG - Generate and install pkg-config file
+#-----------------------------------------------------------------------------
 # pkg-config
 set(PREFIX "${CMAKE_INSTALL_PREFIX}")
 
@@ -260,13 +349,13 @@ if("${CMAKE_INSTALL_FULL_LIBDIR}" STREQUAL "${CMAKE_INSTALL_PREFIX}/${CMAKE_INST
   set(LIBDIR "\${prefix}/${CMAKE_INSTALL_LIBDIR}")
 else()
   set(LIBDIR "${CMAKE_INSTALL_FULL_LIBDIR}")
-endif()
+endif("${CMAKE_INSTALL_FULL_LIBDIR}" STREQUAL "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
 
 if("${CMAKE_INSTALL_FULL_INCLUDEDIR}" STREQUAL "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}")
   set(INCLUDEDIR "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
 else()
   set(INCLUDEDIR "${CMAKE_INSTALL_FULL_INCLUDEDIR}")
-endif()
+endif("${CMAKE_INSTALL_FULL_INCLUDEDIR}" STREQUAL "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}")
 
 # for liblz4.pc substitution
 set(VERSION ${LZ4_VERSION_STRING})

build/cmake/lz4Config.cmake.in

@@ -1,2 +1,10 @@
 @PACKAGE_INIT@
-include( "${CMAKE_CURRENT_LIST_DIR}/lz4Targets.cmake" )
+include( "${CMAKE_CURRENT_LIST_DIR}/lz4Targets.cmake" )
+if(NOT TARGET lz4::lz4)
+    add_library(lz4::lz4 INTERFACE IMPORTED)
+    if("@BUILD_SHARED_LIBS@")
+        set_target_properties(lz4::lz4 PROPERTIES INTERFACE_LINK_LIBRARIES LZ4::lz4_shared)
+    else()
+        set_target_properties(lz4::lz4 PROPERTIES INTERFACE_LINK_LIBRARIES LZ4::lz4_static)
+    endif()
+endif()

build/make/README.md

@@ -0,0 +1,69 @@
+# multiconf.make
+
+**multiconf.make** is a self-contained Makefile include that lets you build the **same targets under many different flag sets**—debug vs release, ASan vs UBSan, GCC vs Clang, etc.—without the usual “object-file soup.”
+It hashes every combination of `CC/CXX`, `CFLAGS/CXXFLAGS`, `CPPFLAGS`, `LDFLAGS` and `LDLIBS` into a **dedicated cache directory**, so objects compiled with one configuration are never reused by another. Swap flags, rebuild, swap back—previous objects are still there and never collide.
+
+---
+
+## Key Benefits
+
+| Why it matters | What multiconf.make does |
+| --- | --- |
+| **Isolated configs** | Stores objects into `cachedObjs/<hash>/`, one directory per unique flag set. |
+| **Fast switching** | Reusing an old config is instant—link only, no recompilation. |
+| **Header deps** | Edits to headers trigger only needed rebuilds. |
+| **One-liner targets** | Macros (`c_program`, `cxx_program`, …) hide all rule boilerplate. |
+| **Parallel-ready** | Safe with `make -j`, no duplicate compiles of shared sources. |
+
+---
+
+## Quick Start
+
+### 1 · List your sources
+
+```make
+C_SRCDIRS   := src src/cdeps    # all .c are in these directories
+CXX_SRCDIRS := src src/cxxdeps  # all .cpp are in these directories
+```
+
+### 2 · Add and include
+
+```make
+# root/Makefile
+include multiconf.make
+```
+
+### 3 · Declare targets
+
+```make
+app:
+$(eval $(call c_program,app,app.o obj1.o obj2.o))
+test:
+$(eval $(call cxx_program,test, test.o objcxx1.o objcxx2.o))
+```
+
+### 4 · Build any config you like
+
+```sh
+# Release with GCC
+make CFLAGS="-O3"
+
+# Debug with Clang + AddressSanitizer (new cache dir)
+make CC=clang CFLAGS="-g -O0 -fsanitize=address"
+
+# Switch back to GCC release (objects still valid, relink only)
+make CFLAGS="-O3"
+```
+
+Objects for each command live in different sub-folders; nothing overlaps.
+
+---
+
+## Additional capabilities
+
+| Command | Description |
+| --- | --- |
+| `make clean_cache` | Wipe **all** cached objects & deps (full rebuild next time) |
+| `V=1` | Show full compile/link commands |
+
+---

build/make/lz4defs.make

@@ -37,27 +37,36 @@ ifeq ($(TARGET_OS),)
   TARGET_OS ?= $(OS)
 endif
 
+# Default to parallel builds for the top-level invocation unless a -j flag is
+# already provided. Recursive makes inherit the jobserver from the parent.
+ifeq ($(MAKELEVEL),0)
+ifeq (,$(filter -j%,$(MAKEFLAGS)))
+NPROC ?= $(shell nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || getconf _NPROCESSORS_ONLN 2>/dev/null || echo 1)
+MAKEFLAGS += -j$(NPROC)
+endif
+endif
+
 ifneq (,$(filter Windows%,$(TARGET_OS)))
-LIBLZ4 = liblz4-$(LIBVER_MAJOR)
-LIBLZ4_EXP = liblz4.lib
-WINBASED   = yes
+LIBLZ4_NAME = liblz4-$(LIBVER_MAJOR)
+LIBLZ4_EXP  = liblz4.lib
+WINBASED    = yes
 else
-LIBLZ4_EXP = liblz4.dll.a
+LIBLZ4_EXP  = liblz4.dll.a
   ifneq (,$(filter MINGW%,$(TARGET_OS)))
-LIBLZ4     = liblz4
-WINBASED   = yes
+LIBLZ4_NAME = liblz4
+WINBASED    = yes
   else
     ifneq (,$(filter MSYS%,$(TARGET_OS)))
-LIBLZ4     = msys-lz4-$(LIBVER_MAJOR)
-WINBASED   = yes
+LIBLZ4_NAME = msys-lz4-$(LIBVER_MAJOR)
+WINBASED    = yes
     else
       ifneq (,$(filter CYGWIN%,$(TARGET_OS)))
-LIBLZ4     = cyglz4-$(LIBVER_MAJOR)
-WINBASED   = yes
+LIBLZ4_NAME = cyglz4-$(LIBVER_MAJOR)
+WINBASED    = yes
       else
-LIBLZ4     = liblz4.$(SHARED_EXT_VER)
-WINBASED   = no
-EXT        =
+LIBLZ4_NAME = liblz4
+WINBASED    = no
+EXT         =
       endif
     endif
   endif
@@ -65,9 +74,12 @@ endif
 
 ifeq ($(WINBASED),yes)
 EXT        = .exe
-WINDRES    = windres
+WINDRES ?= windres
+LDFLAGS += -Wl,--force-exe-suffix
 endif
 
+LIBLZ4      = $(LIBLZ4_NAME).$(SHARED_EXT_VER)
+
 #determine if dev/nul based on host environment
 ifneq (,$(filter MINGW% MSYS% CYGWIN%,$(shell $(UNAME))))
 VOID := /dev/null
@@ -79,7 +91,7 @@ VOID  := /dev/null
   endif
 endif
 
-ifneq (,$(filter Linux Darwin GNU/kFreeBSD GNU OpenBSD FreeBSD NetBSD DragonFly SunOS Haiku MidnightBSD MINGW% CYGWIN% MSYS%,$(shell $(UNAME))))
+ifneq (,$(filter Linux Darwin GNU/kFreeBSD GNU OpenBSD FreeBSD NetBSD DragonFly SunOS Haiku MidnightBSD MINGW% CYGWIN% MSYS% AIX,$(shell $(UNAME))))
 POSIX_ENV = Yes
 else
 POSIX_ENV = No
@@ -108,4 +120,4 @@ endif
 
 INSTALL_PROGRAM ?= $(INSTALL) -m 755
 INSTALL_DATA    ?= $(INSTALL) -m 644
-INSTALL_DIR     ?= $(INSTALL) -d -m 755
+MAKE_DIR        ?= $(INSTALL) -d -m 755

build/make/multiconf.make

@@ -0,0 +1,258 @@
+# ##########################################################################
+# multiconf.make
+# Copyright (C) Yann Collet
+#
+# GPL v2 License
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# ##########################################################################
+
+
+# Provides c_program(_shared_o) and cxx_program(_shared_o) target generation macros
+# Provides static_library and c_dynamic_library target generation macros
+# Support recompilation of only impacted units when an associated *.h is updated.
+# Provides V=1 / VERBOSE=1 support. V=2 is used for debugging purposes.
+# Complement target clean: delete objects and binaries created by this script
+
+# Requires:
+# - C_SRCDIRS, CXX_SRCDIRS, ASM_SRCDIRS defined
+#   OR
+#   C_SRCS, CXX_SRCS and ASM_SRCS variables defined
+#   *and* vpath set to find all source files
+#   OR
+#   C_OBJS, CXX_OBJS and ASM_OBJS variables defined
+#   *and* vpath set to find all source files
+# - directory `cachedObjs/` available to cache object files.
+#   alternatively: set CACHE_ROOT to some different value.
+# Optional:
+# - HASH can be set to a different custom hash program.
+
+# *_program*: generates a recipe for a target that will be built in a cache directory.
+# The cache directory is automatically derived from CACHE_ROOT and list of flags and compilers.
+# *_shared_o* variants are optional optimization variants, that share the same objects across multiple targets.
+# However, as a consequence, all these objects must have exactly the same list of flags,
+# which in practice means that there must be no target-level modification (like: target: CFLAGS += someFlag).
+# If unsure, only use the standard variants, c_program and cxx_program.
+
+# All *_program* macro functions take up to 4 argument:
+# - The name of the target
+# - The list of object files to build in the cache directory
+# - An optional list of dependencies for linking, that will not be built
+# - An optional complementary recipe code, that will run after compilation and link
+
+
+# Silent mode is default; use V = 1 or VERBOSE = 1 to see compilation lines
+VERBOSE ?= $(V)
+$(VERBOSE).SILENT:
+
+# Directory where object files will be built
+CACHE_ROOT ?= cachedObjs
+
+# --------------------------------------------------------------------------------------------
+
+# Dependency management
+DEPFLAGS = -MT $@ -MMD -MP -MF
+
+# Include dependency files
+include $(wildcard $(CACHE_ROOT)/**/*.d)
+include $(wildcard $(CACHE_ROOT)/generic/*/*.d)
+
+# --------------------------------------------------------------------------------------------
+
+# Automatic determination of build artifacts cache directory, keyed on build
+# flags, so that we can do incremental, parallel builds of different binaries
+# with different build flags without collisions.
+
+UNAME ?= $(shell uname)
+ifeq ($(UNAME), Darwin)
+  HASH ?= md5
+else ifeq ($(UNAME), FreeBSD)
+  HASH ?= gmd5sum
+else ifeq ($(UNAME), OpenBSD)
+  HASH ?= md5
+endif
+HASH ?= md5sum
+
+HAVE_HASH := $(shell echo 1 | $(HASH) > /dev/null && echo 1 || echo 0)
+ifeq ($(HAVE_HASH),0)
+  $(info warning : could not find HASH ($(HASH)), required to differentiate builds using different flags)
+  HASH_FUNC = generic/$(1)
+else
+  HASH_FUNC = $(firstword $(shell echo $(2) | $(HASH) ))
+endif
+
+
+MKDIR ?= mkdir
+LN ?= ln
+
+# --------------------------------------------------------------------------------------------
+# The following macros are used to create object files in the cache directory.
+# The object files are named after the source file, but with a different path.
+
+# Create build directories on-demand.
+#
+# For some reason, make treats the directory as an intermediate file and tries
+# to delete it. So we work around that by marking it "precious". Solution found
+# here:
+# http://ismail.badawi.io/blog/2017/03/28/automatic-directory-creation-in-make/
+.PRECIOUS: $(CACHE_ROOT)/%/.
+$(CACHE_ROOT)/%/. :
+	$(MKDIR) -p $@
+
+
+define addTargetAsmObject  # targetName, addlDeps
+$$(if $$(filter 2,$$(V)),$$(info $$(call $(0),$(1),$(2))))
+
+.PRECIOUS: $$(CACHE_ROOT)/%/$(1)
+$$(CACHE_ROOT)/%/$(1) : $(1:.o=.S) $(2) | $$(CACHE_ROOT)/%/.
+	@echo AS $$@
+	$$(CC) $$(CPPFLAGS) $$(CXXFLAGS) $$(DEPFLAGS) $$(CACHE_ROOT)/$$*/$(1:.o=.d) -c $$< -o $$@
+
+endef # addTargetAsmObject
+
+define addTargetCObject  # targetName, addlDeps
+$$(if $$(filter 2,$$(V)),$$(info $$(call $(0),$(1),$(2)))) #debug print
+
+.PRECIOUS: $$(CACHE_ROOT)/%/$(1)
+$$(CACHE_ROOT)/%/$(1) : $(1:.o=.c) $(2) | $$(CACHE_ROOT)/%/.
+	@echo CC $$@
+	$$(CC) $$(CPPFLAGS) $$(CFLAGS) $$(DEPFLAGS) $$(CACHE_ROOT)/$$*/$(1:.o=.d) -c $$< -o $$@
+
+endef # addTargetCObject
+
+define addTargetCxxObject  # targetName, suffix, addlDeps
+$$(if $$(filter 2,$$(V)),$$(info $$(call $(0),$(1),$(2),$(3))))
+
+.PRECIOUS: $$(CACHE_ROOT)/%/$(1)
+$$(CACHE_ROOT)/%/$(1) : $(1:.o=.$(2)) $(3) | $$(CACHE_ROOT)/%/.
+	@echo CXX $$@
+	$$(CXX) $$(CPPFLAGS) $$(CXXFLAGS) $$(DEPFLAGS) $$(CACHE_ROOT)/$$*/$(1:.o=.d) -c $$< -o $$@
+
+endef # addTargetCxxObject
+
+# Create targets for individual object files
+C_SRCDIRS += .
+vpath %.c $(C_SRCDIRS)
+CXX_SRCDIRS += .
+vpath %.cpp $(CXX_SRCDIRS)
+vpath %.cc $(CXX_SRCDIRS)
+ASM_SRCDIRS += .
+vpath %.S $(ASM_SRCDIRS)
+
+# If C_SRCDIRS, CXX_SRCDIRS and ASM_SRCDIRS are not defined, use C_SRCS, CXX_SRCS and ASM_SRCS
+C_SRCS   ?= $(notdir $(foreach dir,$(C_SRCDIRS),$(wildcard $(dir)/*.c)))
+CPP_SRCS ?= $(notdir $(foreach dir,$(CXX_SRCDIRS),$(wildcard $(dir)/*.cpp)))
+CC_SRCS  ?= $(notdir $(foreach dir,$(CXX_SRCDIRS),$(wildcard $(dir)/*.cc)))
+CXX_SRCS ?= $(CPP_SRCS) $(CC_SRCS)
+ASM_SRCS ?= $(notdir $(foreach dir,$(ASM_SRCDIRS),$(wildcard $(dir)/*.S)))
+
+# If C_SRCS, CXX_SRCS and ASM_SRCS are not defined, use C_OBJS, CXX_OBJS and ASM_OBJS
+C_OBJS   ?= $(patsubst %.c,%.o,$(C_SRCS))
+CPP_OBJS ?= $(patsubst %.cpp,%.o,$(CPP_SRCS))
+CC_OBJS  ?= $(patsubst %.cc,%.o,$(CC_SRCS))
+CXX_OBJS ?= $(CPP_OBJS) $(CC_OBJS) # Note: not used
+ASM_OBJS ?= $(patsubst %.S,%.o,$(ASM_SRCS))
+
+$(foreach OBJ,$(C_OBJS),$(eval $(call addTargetCObject,$(OBJ))))
+$(foreach OBJ,$(CPP_OBJS),$(eval $(call addTargetCxxObject,$(OBJ),cpp)))
+$(foreach OBJ,$(CC_OBJS),$(eval $(call addTargetCxxObject,$(OBJ),cc)))
+$(foreach OBJ,$(ASM_OBJS),$(eval $(call addTargetAsmObject,$(OBJ))))
+
+# --------------------------------------------------------------------------------------------
+# The following macros are used to create targets in the user Makefile.
+# Binaries are built in the cache directory, and then symlinked to the current directory.
+# The cache directory is automatically derived from CACHE_ROOT and list of flags and compilers.
+
+define static_library  # targetName, targetDeps, addlDeps, addRecipe, hashComplement
+
+$$(if $$(filter 2,$$(V)),$$(info $$(call $(0),$(1),$(2),$(3),$(4),$(5))))
+MCM_ALL_BINS += $(1)
+
+$$(CACHE_ROOT)/%/$(1) : $$(addprefix $$(CACHE_ROOT)/%/,$(2)) $(3)
+	@echo AR $$@
+	$$(AR) $$(ARFLAGS) $$@ $$^
+	$(4)
+
+.PHONY: $(1)
+$(1) : ARFLAGS = rcs
+$(1) : $$(CACHE_ROOT)/$$(call HASH_FUNC,$(1),$(2) $$(CPPFLAGS) $$(CC) $$(CFLAGS) $$(CXX) $$(CXXFLAGS) $$(AR) $$(ARFLAGS) $(5))/$(1)
+	$$(LN) -sf $$< $$@
+
+endef # static_library
+
+
+define c_dynamic_library  # targetName, targetDeps, addlDeps, addRecipe, hashComplement
+
+$$(if $$(filter 2,$$(V)),$$(info $$(call $(0),$(1),$(2),$(3),$(4),$(5))))
+MCM_ALL_BINS += $(1)
+
+$$(CACHE_ROOT)/%/$(1) : $$(addprefix $$(CACHE_ROOT)/%/,$(2)) $(3)
+	@echo LD $$@
+	$$(CC) $$(CPPFLAGS) $$(CFLAGS) $$(LDFLAGS) -shared -o $$@ $$^ $$(LDLIBS)
+	$(4)
+
+.PHONY: $(1)
+$(1) : CFLAGS += -fPIC
+$(1) : $$(CACHE_ROOT)/$$(call HASH_FUNC,$(1),$(2) $$(CPPFLAGS) $$(CC) $$(CFLAGS) $$(LDFLAGS) $$(LDLIBS) $(5))/$(1)
+	$$(LN) -sf $$< $$@
+
+endef # c_dynamic_library
+
+
+define program_base  # targetName, targetDeps, addlDeps, addRecipe, hashComplement, compiler, flags
+
+$$(if $$(filter 2,$$(V)),$$(info $$(call $(0),$(1),$(2),$(3),$(4),$(5),$(6),$(7))))
+MCM_ALL_BINS += $(1)
+
+$$(CACHE_ROOT)/%/$(1) : $$(addprefix $$(CACHE_ROOT)/%/,$(2)) $(3)
+	@echo LD $$@
+	$$($(6)) $$(CPPFLAGS) $$($(7)) $$^ -o $$@ $$(LDFLAGS) $$(LDLIBS)
+	$(4)
+
+.PHONY: $(1)
+$(1) : $$(CACHE_ROOT)/$$(call HASH_FUNC,$(1),$$($(6)) $$(CPPFLAGS) $$($(7)) $$(LDFLAGS) $$(LDLIBS) $(5))/$(1)
+	$$(LN) -sf $$< $$@$(EXT)
+
+endef # program_base
+# Note: $(EXT) must be set to .exe for Windows
+
+define c_program  # targetName, targetDeps, addlDeps, addRecipe
+$$(eval $$(call program_base,$(1),$(2),$(3),$(4),$(1)$(2),CC,CFLAGS))
+endef # c_program
+
+define c_program_shared_o  # targetName, targetDeps, addlDeps, addRecipe
+$$(eval $$(call program_base,$(1),$(2),$(3),$(4),,CC,CFLAGS))
+endef # c_program_shared_o
+
+define cxx_program  # targetName, targetDeps, addlDeps, addRecipe
+$$(eval $$(call program_base,$(1),$(2),$(3),$(4),$(1)$(2),CXX,CXXFLAGS))
+endef # cxx_program
+
+define cxx_program_shared_o  # targetName, targetDeps, addlDeps, addRecipe
+$$(eval $$(call program_base,$(1),$(2),$(3),$(4),,CXX,CXXFLAGS))
+endef # cxx_program_shared_o
+
+# --------------------------------------------------------------------------------------------
+
+# Cleaning: delete all objects and binaries created with this script
+.PHONY: clean_cache
+clean_cache:
+	$(RM) -rf $(CACHE_ROOT)
+	$(RM) $(MCM_ALL_BINS)
+
+# automatically attach to standard clean target
+.PHONY: clean
+clean: clean_cache

build/meson/GetLz4LibraryVersion.py

@@ -15,9 +15,9 @@ def find_version_tuple(filepath):
   with open(filepath) as fd:
     version_file_data = fd.read()
 
-  patterns = r"""#\s*define\s+LZ4_VERSION_MAJOR\s+([0-9]+).*$
-#\s*define\s+LZ4_VERSION_MINOR\s+([0-9]+).*$
-#\s*define\s+LZ4_VERSION_RELEASE\s+([0-9]+).*$
+  patterns = r"""\s*#\s*define\s+LZ4_VERSION_MAJOR\s+([0-9]+).*$
+\s*#\s*define\s+LZ4_VERSION_MINOR\s+([0-9]+).*$
+\s*#\s*define\s+LZ4_VERSION_RELEASE\s+([0-9]+).*$
 """
   regex = re.compile(patterns, re.MULTILINE)
   version_match = regex.search(version_file_data)

build/meson/README.md

@@ -10,7 +10,7 @@ This Meson build system is provided with no guarantee.
 
 ## How to build
 
-`cd` to this meson directory (`contrib/meson`)
+`cd` to this meson directory (`build/meson`)
 
 ```sh
 meson setup --buildtype=release -Ddefault_library=shared -Dprograms=true builddir

build/meson/meson.build

@@ -13,15 +13,18 @@
 
 project(
   'lz4',
-  ['c'],
+  'c',
   license: 'BSD-2-Clause-Patent AND GPL-2.0-or-later',
   default_options: [
-    'c_std=c99',
     'buildtype=release',
     'warning_level=3'
   ],
-  version: 'DUMMY',
-  meson_version: '>=0.49.0'
+  version: run_command(
+    find_program('GetLz4LibraryVersion.py'),
+    '../../lib/lz4.h',
+    check: true
+  ).stdout().strip(),
+  meson_version: '>=0.58.0'
 )
 
 subdir('meson')

build/meson/meson/contrib/gen_manual/meson.build

@@ -10,7 +10,7 @@
 
 lz4_source_root = '../../../../..'
 
-add_languages('cpp')
+add_languages('cpp', native: true)
 
 sources = files(
   lz4_source_root / 'contrib/gen_manual/gen_manual.cpp'
@@ -33,7 +33,7 @@ foreach mp : manual_pages
     output: '@0@_manual.html'.format(mp),
     command: [
       gen_manual,
-      lz4_version,
+      meson.project_version(),
       '@INPUT@',
       '@OUTPUT@',
     ],

build/meson/meson/examples/meson.build

@@ -11,15 +11,15 @@
 lz4_source_root = '../../../..'
 
 examples = {
-  'printVersion': 'printVersion.c',
-  'doubleBuffer': 'blockStreaming_doubleBuffer.c',
+  'print_version': 'print_version.c',
+  'blockStreaming_doubleBuffer': 'blockStreaming_doubleBuffer.c',
   'dictionaryRandomAccess': 'dictionaryRandomAccess.c',
-  'ringBuffer': 'blockStreaming_ringBuffer.c',
-  'ringBufferHC': 'HCStreaming_ringBuffer.c',
-  'lineCompress': 'blockStreaming_lineByLine.c',
+  'blockStreaming_ringBuffer': 'blockStreaming_ringBuffer.c',
+  'streamingHC_ringBuffer': 'streamingHC_ringBuffer.c',
+  'blockStreaming_lineByLine': 'blockStreaming_lineByLine.c',
   'frameCompress': 'frameCompress.c',
-  'compressFunctions': 'compress_functions.c',
-  'simpleBuffer': 'simple_buffer.c',
+  'bench_functions': 'bench_functions.c',
+  'simple_buffer': 'simple_buffer.c',
 }
 
 foreach e, src : examples

build/meson/meson/lib/meson.build

@@ -17,41 +17,49 @@ sources = files(
   lz4_source_root / 'lib/xxhash.c'
 )
 
+if get_option('unstable')
+  sources += files(lz4_source_root / 'lib/lz4file.c')
+endif
+
 c_args = []
 
 if host_machine.system() == 'windows' and get_option('default_library') != 'static'
   c_args += '-DLZ4_DLL_EXPORT=1'
 endif
 
-if get_option('unstable')
-  compile_args += '-DLZ4_STATIC_LINKING_ONLY'
-  if get_option('default_library') != 'static'
-    c_args += '-DLZ4_PUBLISH_STATIC_FUNCTIONS'
-  endif
-endif
-
 liblz4 = library(
   'lz4',
   sources,
+  c_args: c_args,
   install: true,
-  version: lz4_version,
+  version: meson.project_version(),
   gnu_symbol_visibility: 'hidden'
 )
 
 liblz4_dep = declare_dependency(
   link_with: liblz4,
+  compile_args: compile_args,
   include_directories: include_directories(lz4_source_root / 'lib')
 )
 
-if get_option('tests') or get_option('programs') or get_option('examples')
-  liblz4_internal = static_library(
-    'lz4-internal',
-    objects: liblz4.extract_all_objects(recursive: true),
-    gnu_symbol_visibility: 'hidden'
-  )
+meson.override_dependency('liblz4', liblz4_dep)
+
+if get_option('tests') or get_option('programs') or get_option('examples') or get_option('ossfuzz')
+  if get_option('default_library') == 'shared'
+    liblz4_internal = static_library(
+      'lz4-internal',
+      objects: liblz4.extract_all_objects(recursive: true),
+      gnu_symbol_visibility: 'hidden'
+    )
+  elif get_option('default_library') == 'static'
+    liblz4_internal = liblz4
+  elif get_option('default_library') == 'both'
+    liblz4_internal = liblz4.get_static_lib()
+  endif
 
   liblz4_internal_dep = declare_dependency(
     link_with: liblz4_internal,
+    compile_args: compile_args,
     include_directories: include_directories(lz4_source_root / 'lib')
   )
 endif
@@ -61,7 +69,7 @@ pkgconfig.generate(
   name: 'lz4',
   filebase: 'liblz4',
   description: 'extremely fast lossless compression algorithm library',
-  version: lz4_version,
+  version: meson.project_version(),
   url: 'http://www.lz4.org/'
 )
 
@@ -73,4 +81,7 @@ install_headers(
 
 if get_option('default_library') != 'shared'
   install_headers(lz4_source_root / 'lib/lz4frame_static.h')
+  if get_option('unstable')
+    install_headers(lz4_source_root / 'lib/lz4file.h')
+  endif
 endif

build/meson/meson/meson.build

@@ -0,0 +1,135 @@
+# #############################################################################
+# Copyright (c) 2018-present        lzutao <taolzu(at)gmail.com>
+# Copyright (c) 2022-present        Tristan Partin <tristan(at)partin.io>
+# All rights reserved.
+#
+# This source code is licensed under both the BSD-style license (found in the
+# LICENSE file in the root directory of this source tree) and the GPLv2 (found
+# in the COPYING file in the root directory of this source tree).
+# #############################################################################
+
+cc = meson.get_compiler('c')
+
+fs = import('fs')
+pkgconfig = import('pkgconfig')
+
+lz4_source_root = '../../..'
+
+add_project_arguments('-DXXH_NAMESPACE=LZ4_', language: 'c')
+
+if get_option('debug')
+  add_project_arguments(cc.get_supported_arguments(
+      '-Wcast-qual',
+      '-Wcast-align',
+      '-Wshadow',
+      '-Wswitch-enum',
+      '-Wdeclaration-after-statement',
+      '-Wstrict-prototypes',
+      '-Wundef',
+      '-Wpointer-arith',
+      '-Wstrict-aliasing=1',
+      '-DLZ4_DEBUG=@0@'.format(get_option('debug-level'))
+    ),
+    language: 'c'
+  )
+endif
+
+compile_args = []
+
+if not get_option('align-test')
+  add_project_arguments('-DLZ4_ALIGN_TEST=0', language: 'c')
+endif
+
+if get_option('disable-memory-allocation')
+  if get_option('default_library') != 'static'
+    error('Memory allocation can only be disabled in static builds')
+  endif
+
+  add_project_arguments('-DLZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION')
+  compile_args += '-DLZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION'
+endif
+
+add_project_arguments(
+  '-DLZ4_DISTANCE_MAX=@0@'.format(get_option('distance-max')),
+  language: 'c'
+)
+compile_args += '-DLZ4_DISTANCE_MAX=@0@'.format(get_option('distance-max'))
+
+if not get_option('fast-dec-loop').auto()
+  add_project_arguments(
+    '-DLZ4_FAST_DEC_LOOP=@0@'.format(
+      get_option('fast-dec-loop').enabled() ? 1 : 0
+    ),
+    language: 'c'
+  )
+endif
+
+if get_option('force-sw-bitcount')
+  add_project_arguments('-DLZ4_FORCE_SW_BITCOUNT', language: 'c')
+endif
+
+if get_option('freestanding')
+  add_project_arguments('-DLZ4_FREESTANDING=1', language: 'c')
+  compile_args += '-DLZ4_FREESTANDING=1'
+endif
+
+if get_option('memory-usage') > 0
+  add_project_arguments(
+    '-DLZ4_MEMORY_USAGE=@0@'.format(get_option('memory-usage')),
+    language: 'c'
+  )
+  compile_args += '-DLZ4_MEMORY_USAGE=@0@'.format(get_option('memory-usage'))
+endif
+
+if get_option('endianness-independent-output')
+  if get_option('default_library') != 'static'
+    error('Endianness-independent output can only be enabled in static builds')
+  endif
+
+  add_project_arguments('-DLZ4_STATIC_LINKING_ONLY_ENDIANNESS_INDEPENDENT_OUTPUT')
+  compile_args += '-DLZ4_STATIC_LINKING_ONLY_ENDIANNESS_INDEPENDENT_OUTPUT'
+endif
+
+if get_option('unstable')
+  add_project_arguments('-DLZ4_STATIC_LINKING_ONLY', language: 'c')
+  compile_args += '-DLZ4_STATIC_LINKING_ONLY'
+  if get_option('default_library') != 'static'
+    add_project_arguments('-DLZ4_PUBLISH_STATIC_FUNCTIONS', language: 'c')
+    compile_args += '-DLZ4_PUBLISH_STATIC_FUNCTIONS'
+
+    add_project_arguments('-DLZ4F_PUBLISH_STATIC_FUNCTIONS', language: 'c')
+    compile_args += '-DLZ4F_PUBLISH_STATIC_FUNCTIONS'
+  endif
+endif
+
+if get_option('user-memory-functions')
+  add_project_arguments('-DLZ4_USER_MEMORY_FUNCTIONS', language: 'c')
+endif
+
+run_env = environment()
+
+subdir('lib')
+
+if get_option('programs')
+  subdir('programs')
+else
+  lz4 = disabler()
+  lz4cat = disabler()
+  unlz4 = disabler()
+endif
+
+if get_option('tests')
+  subdir('tests')
+endif
+
+if get_option('contrib')
+  subdir('contrib')
+endif
+
+if get_option('examples')
+  subdir('examples')
+endif
+
+if get_option('ossfuzz')
+  subdir('ossfuzz')
+endif

build/meson/meson/ossfuzz/meson.build

@@ -0,0 +1,37 @@
+lz4_source_root = '../../../..'
+
+fuzzers = [
+  'compress_frame_fuzzer',
+  'compress_fuzzer',
+  'compress_hc_fuzzer',
+  'decompress_frame_fuzzer',
+  'decompress_fuzzer',
+  'round_trip_frame_uncompressed_fuzzer',
+  'round_trip_fuzzer',
+  'round_trip_hc_fuzzer',
+  'round_trip_stream_fuzzer'
+]
+
+c_args = cc.get_supported_arguments(
+  '-Wno-unused-function',
+  '-Wno-sign-compare',
+  '-Wno-declaration-after-statement'
+)
+
+foreach f : fuzzers
+  lib = static_library(
+    f,
+    lz4_source_root / 'ossfuzz/@0@.c'.format(f),
+    lz4_source_root / 'ossfuzz/lz4_helpers.c',
+    lz4_source_root / 'ossfuzz/fuzz_data_producer.c',
+    c_args: c_args,
+    dependencies: [liblz4_internal_dep]
+  )
+
+  executable(
+    f,
+    lz4_source_root / 'ossfuzz/standaloneengine.c',
+    link_with: lib,
+    dependencies: [liblz4_internal_dep]
+  )
+endforeach

build/meson/meson/programs/meson.build

@@ -10,22 +10,69 @@
 
 lz4_source_root = '../../../..'
 
+# note:
+# it would be preferable to use some kind of glob or wildcard expansion here...
 sources = files(
   lz4_source_root / 'programs/bench.c',
-  lz4_source_root / 'programs/datagen.c',
+  lz4_source_root / 'programs/lorem.c',
   lz4_source_root / 'programs/lz4cli.c',
   lz4_source_root / 'programs/lz4io.c',
+  lz4_source_root / 'programs/util.c',
+  lz4_source_root / 'programs/threadpool.c',
+  lz4_source_root / 'programs/timefn.c',
 )
 
+# Initialize an empty list for extra dependencies
+extra_deps = []
+
+if get_option('enable_multithread')
+  pthread_dep = dependency('threads', required : true)
+  extra_deps += [pthread_dep]
+  multithread_args = ['-DLZ4IO_MULTITHREAD']
+else
+  multithread_args = []
+endif
+
 lz4 = executable(
   'lz4',
   sources,
   include_directories: include_directories(lz4_source_root / 'programs'),
-  dependencies: [liblz4_internal_dep],
+  dependencies: [liblz4_internal_dep] + extra_deps,
+  c_args: multithread_args,
   export_dynamic: get_option('debug') and host_machine.system() == 'windows',
   install: true
 )
 
+lz4cat = custom_target(
+  'lz4cat',
+  input: lz4,
+  output: 'lz4cat',
+  command: [
+    'ln',
+    '-s',
+    '-f',
+    fs.name(lz4.full_path()),
+    '@OUTPUT@'
+  ]
+)
+
+unlz4 = custom_target(
+  'unlz4',
+  input: lz4,
+  output: 'unlz4',
+  command: [
+    'ln',
+    '-s',
+    '-f',
+    fs.name(lz4.full_path()),
+    '@OUTPUT@'
+  ]
+)
+
+meson.override_find_program('lz4', lz4)
+
+run_env.prepend('PATH', meson.current_build_dir())
+
 install_man(lz4_source_root / 'programs/lz4.1')
 
 if meson.version().version_compare('>=0.61.0')

build/meson/meson/tests/meson.build

@@ -0,0 +1,165 @@
+# #############################################################################
+# Copyright (c) 2018-present        lzutao <taolzu(at)gmail.com>
+# Copyright (c) 2022-present        Tristan Partin <tristan(at)partin.io>
+# All rights reserved.
+#
+# This source code is licensed under both the BSD-style license (found in the
+# LICENSE file in the root directory of this source tree) and the GPLv2 (found
+# in the COPYING file in the root directory of this source tree).
+# #############################################################################
+
+lz4_source_root = '../../../..'
+
+fuzzer_time = 90
+test_exes = {
+  'abiTest': {
+    'sources': files(lz4_source_root / 'tests/abiTest.c'),
+    'test': false,
+  },
+  'checkFrame': {
+    'sources': files(lz4_source_root / 'tests/checkFrame.c'),
+    'include_directories': include_directories(lz4_source_root / 'programs'),
+  },
+  'checkTag': {
+    'sources': files(lz4_source_root / 'tests/checkTag.c'),
+    'test': false,
+  },
+  'datagen': {
+    'sources': files(
+        lz4_source_root / 'programs/lorem.c',
+        lz4_source_root / 'tests/datagencli.c',
+        lz4_source_root / 'tests/datagen.c',
+        lz4_source_root / 'tests/loremOut.c',
+        ),
+    'include_directories': include_directories(lz4_source_root / 'programs'),
+  },
+  'decompress-partial-usingDict.c': {
+    'sources': files(lz4_source_root / 'tests/decompress-partial-usingDict.c'),
+  },
+  'decompress-partial.c': {
+    'sources': files(lz4_source_root / 'tests/decompress-partial.c'),
+  },
+  'frametest': {
+    'sources': files(
+      lz4_source_root / 'tests/frametest.c',
+      lz4_source_root / 'lib/lz4file.c',
+    ),
+    'include_directories': include_directories(lz4_source_root / 'programs'),
+    'args': ['-v', '-T@0@s'.format(fuzzer_time)],
+    'test': false,
+  },
+  'freestanding': {
+    'sources': files(lz4_source_root / 'tests/freestanding.c'),
+    'c_args': ['-ffreestanding', '-fno-stack-protector', '-Wno-unused-parameter', '-Wno-declaration-after-statement', '-DLZ4_DEBUG=0'],
+    'link_args': ['-nostdlib'],
+    'build': cc.get_id() in ['gcc', 'clang'] and
+      host_machine.system() == 'linux' and host_machine.cpu_family() == 'x86_64',
+    'override_options': ['optimization=1'],
+  },
+  'fullbench': {
+    'sources': files(lz4_source_root / 'tests/fullbench.c'),
+    'include_directories': include_directories(lz4_source_root / 'programs'),
+    'args': ['--no-prompt', '-i1', files(lz4_source_root / 'tests/COPYING')],
+    'test': false,
+  },
+  'fuzzer': {
+    'sources': files(lz4_source_root / 'tests/fuzzer.c'),
+    'include_directories': include_directories(lz4_source_root / 'programs'),
+    'args': ['-T@0@s'.format(fuzzer_time)],
+    'test': false,
+  },
+  'roundTripTest': {
+    'sources': files(lz4_source_root / 'tests/roundTripTest.c'),
+    'test': false,
+  },
+}
+
+targets = {}
+
+foreach e, attrs : test_exes
+  if not attrs.get('build', true)
+    targets += {e: disabler()}
+    continue
+  endif
+
+  t = executable(
+    e,
+    attrs.get('sources'),
+    c_args: attrs.get('c_args', []),
+    link_args: attrs.get('link_args', []),
+    objects: attrs.get('objects', []),
+    dependencies: [liblz4_internal_dep],
+    include_directories: attrs.get('include_directories', []),
+    install: false,
+    override_options: attrs.get('override_options', [])
+  )
+
+  targets += {e: t}
+
+  if not attrs.get('test', true)
+    continue
+  endif
+
+  test(
+    e,
+    t,
+    args: attrs.get('params', []),
+    timeout: 120
+  )
+endforeach
+
+fs = import('fs')
+
+run_env.prepend('PATH', meson.current_build_dir())
+
+test_scripts = {
+  'lz4-basic': {
+    'depends': [lz4, lz4cat, unlz4, targets['datagen']],
+  },
+  'lz4-dict': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4-contentSize': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4-fast-hugefile': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4-frame-concatenation': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4-multiple': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4-multiple-legacy': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4-opt-parser': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4-skippable': {
+    'depends': [lz4],
+  },
+  'lz4-sparse': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4-testmode': {
+    'depends': [lz4, targets['datagen']],
+  },
+  'lz4hc-hugefile': {
+    'depends': [lz4, targets['datagen']],
+  },
+}
+
+foreach s, attrs : test_scripts
+  script = find_program(lz4_source_root / 'tests/test-@0@.sh'.format(s))
+
+  test(
+    '@0@'.format(s),
+    script,
+    depends: attrs.get('depends', []),
+    workdir: fs.parent(script.full_path()),
+    env: run_env,
+    timeout: 360
+  )
+endforeach

build/meson/meson_options.txt

@@ -0,0 +1,44 @@
+# #############################################################################
+# Copyright (c) 2018-present        lzutao <taolzu(at)gmail.com>
+# Copyright (c) 2022-present        Tristan Partin <tristan(at)partin.io>
+# All rights reserved.
+#
+# This source code is licensed under both the BSD-style license (found in the
+# LICENSE file in the root directory of this source tree) and the GPLv2 (found
+# in the COPYING file in the root directory of this source tree).
+# #############################################################################
+
+option('enable_multithread', type: 'boolean', value: true,
+  description: 'Enable multi-threading support')
+option('align-test', type: 'boolean', value: true,
+  description: 'See LZ4_ALIGN_TEST')
+option('contrib', type: 'boolean', value: false,
+  description: 'Enable contrib')
+option('debug-level', type: 'integer', min: 0, max: 7, value: 1,
+  description: 'Enable run-time debug. See lib/lz4hc.c')
+option('disable-memory-allocation', type: 'boolean', value: false,
+  description: 'See LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION. Static builds only')
+option('distance-max', type: 'integer', min: 0, max: 65535, value: 65535,
+  description: 'See LZ4_DISTANCE_MAX')
+option('endianness-independent-output', type: 'boolean', value: false,
+  description: 'See LZ4_STATIC_LINKING_ONLY_ENDIANNESS_INDEPENDENT_OUTPUT. Static builds only')
+option('examples', type: 'boolean', value: false,
+  description: 'Enable examples')
+option('fast-dec-loop', type: 'feature', value: 'auto',
+  description: 'See LZ4_FAST_DEC_LOOP')
+option('force-sw-bitcount', type: 'boolean', value: false,
+  description: 'See LZ4_FORCE_SW_BITCOUNT')
+option('freestanding', type: 'boolean', value: false,
+  description: 'See LZ4_FREESTANDING')
+option('memory-usage', type: 'integer', min: 0, max: 20, value: 0,
+  description: 'See LZ4_MEMORY_USAGE. 0 means use the LZ4 default')
+option('ossfuzz', type: 'boolean', value: true,
+  description: 'Enable ossfuzz')
+option('programs', type: 'boolean', value: false,
+  description: 'Enable programs')
+option('tests', type: 'boolean', value: false,
+  description: 'Enable tests')
+option('unstable', type: 'boolean', value: false,
+  description: 'Expose unstable interfaces')
+option('user-memory-functions', type: 'boolean', value: false,
+  description: 'See LZ4_USER_MEMORY_FUNCTIONS')

build/visual/README.md

@@ -0,0 +1,5 @@
+These scripts will generate Visual Studio Solutions for a selected set of supported versions of MS Visual.
+
+For these scripts to work, both `cmake` and the relevant Visual Studio version must be locally installed on the system where the script is run.
+
+If `cmake` is installed into a non-standard directory, or user wants to test a specific version of `cmake`, the target `cmake` directory can be provided via the environment variable `CMAKE_PATH`.

build/visual/generate_solution.cmd

@@ -0,0 +1,55 @@
+:: Requires 1 parameter == GENERATOR
+@echo off
+setlocal
+
+:: Set path
+set "BUILD_BASE_DIR=%~dp0"  :: Use the directory where the script is located
+set "CMAKELIST_DIR=..\..\cmake"
+
+if "%~1"=="" (
+    echo No generator specified as first parameter
+    exit /b 1
+)
+set "GENERATOR=%~1"
+
+:: Check if a user-defined CMAKE_PATH is set and prioritize it
+if defined CMAKE_PATH (
+    set "CMAKE_EXECUTABLE=%CMAKE_PATH%\cmake.exe"
+    echo Using user-defined cmake at %CMAKE_PATH%
+) else (
+    :: Attempt to find cmake in the system PATH
+    where cmake >nul 2>&1
+    if %ERRORLEVEL% neq 0 (
+        :: Use the default standard cmake installation directory if not found in PATH
+        set "CMAKE_PATH=C:\Program Files\CMake\bin"
+        echo CMake not in system PATH => using default CMAKE_PATH=%CMAKE_PATH%
+        set "CMAKE_EXECUTABLE=%CMAKE_PATH%\cmake.exe"
+    ) else (
+        set "CMAKE_EXECUTABLE=cmake"
+        echo CMake found in system PATH.
+    )
+)
+
+:: Set the build directory to a subdirectory named after the generator
+set "BUILD_DIR=%BUILD_BASE_DIR%\%GENERATOR%"
+
+:: Create the build directory if it doesn't exist
+if not exist "%BUILD_DIR%" mkdir "%BUILD_DIR%"
+
+:: Run CMake to configure the project and generate the solution
+pushd "%BUILD_DIR%"
+"%CMAKE_EXECUTABLE%" -G "%GENERATOR%" "%CMAKELIST_DIR%"
+if %ERRORLEVEL% neq 0 goto :error
+
+:: If successful, end script
+echo Build configuration successful for %GENERATOR%.
+goto :end
+
+:error
+echo Failed to configure build for %GENERATOR%.
+exit /b 1
+
+:end
+popd
+endlocal
+@echo on

build/visual/generate_vs2015.cmd

@@ -0,0 +1,3 @@
+@echo off
+:: Call the central script with the specific generator for VS2015
+call generate_solution.cmd "Visual Studio 14 2015"

build/visual/generate_vs2017.cmd

@@ -0,0 +1,3 @@
+@echo off
+:: Call the central script with the specific generator for VS2017
+call generate_solution.cmd "Visual Studio 15 2017"

build/visual/generate_vs2019.cmd

@@ -0,0 +1,3 @@
+@echo off
+:: Call the central script with the specific generator for VS2019
+call generate_solution.cmd "Visual Studio 16 2019"

build/visual/generate_vs2022.cmd

@@ -0,0 +1,3 @@
+@echo off
+:: Call the central script with the specific generator for VS2022
+call generate_solution.cmd "Visual Studio 17 2022"

contrib/debian/changelog

@@ -1,10 +0,0 @@
-liblz4 (1.7.2) unstable; urgency=low
-
-  * Changed : moved to versioning; package, cli and library have same version number
-  * Improved: Small decompression speed boost (+4%)
-  * Improved: Performance on ARMv6 and ARMv7
-  * Added : Debianization, by Evgeniy Polyakov
-  * Makefile: Generates object files (*.o) for faster (re)compilation on low power systems
-  * Fix : cli : crash on some invalid inputs
-
- -- Yann Collet <Cyan4973@github.com>  Sun, 28 Jun 2015 01:00:00 +0000

contrib/debian/compat

@@ -1 +0,0 @@
-7

contrib/debian/control

@@ -1,23 +0,0 @@
-Source: liblz4
-Section: devel
-Priority: optional
-Maintainer: Evgeniy Polyakov <zbr@ioremap.net>
-Build-Depends:
- cmake (>= 2.6),
- debhelper (>= 7.0.50~),
- cdbs
-Standards-Version: 3.8.0
-Homepage: http://www.lz4.org/
-Vcs-Git: git://github.com/lz4/lz4.git
-Vcs-Browser: https://github.com/lz4/lz4
-
-Package: liblz4
-Architecture: any
-Depends: ${shlibs:Depends}, ${misc:Depends}
-Description: Extremely Fast Compression algorithm http://www.lz4.org
-
-Package: liblz4-dev
-Architecture: any
-Depends: ${shlibs:Depends}, ${misc:Depends}
-Description: Extremely Fast Compression algorithm http://www.lz4.org
- Development files.

contrib/debian/copyright

@@ -1,9 +0,0 @@
-Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
-Upstream-Name: liblz4
-Upstream-Contact: Yann Collet <Cyan4973@github.com>
-Source: https://github.com/lz4/lz4
-
-Files: *
-Copyright: (C) 2011-2020 Yann Collet
-License: GPL-2+
- The full text of license: https://github.com/lz4/lz4/blob/dev/lib/LICENSE

contrib/debian/dirs

@@ -1 +0,0 @@
-usr/bin

contrib/debian/liblz4-dev.install

@@ -1,2 +0,0 @@
-usr/include/lz4*
-usr/lib/liblz4.so

contrib/debian/liblz4.install

@@ -1,2 +0,0 @@
-usr/lib/liblz4.so.*
-usr/bin/*

contrib/debian/rules

@@ -1,7 +0,0 @@
-#!/usr/bin/make -f
-
-include /usr/share/cdbs/1/rules/debhelper.mk
-include /usr/share/cdbs/1/class/cmake.mk
-
-
-DEB_CMAKE_EXTRA_FLAGS := -DCMAKE_BUILD_TYPE=RelWithDebInfo ../../build/cmake

contrib/djgpp/Makefile

@@ -7,9 +7,9 @@ DESTDIR ?= /opt/local
 # Version numbers
 VERSION ?= 129
 RELEASE ?= r$(VERSION)
-LIBVER_MAJOR=$(shell sed -n '/define LZ4_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < lib/lz4.h)
-LIBVER_MINOR=$(shell sed -n '/define LZ4_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < lib/lz4.h)
-LIBVER_PATCH=$(shell sed -n '/define LZ4_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < lib/lz4.h)
+LIBVER_MAJOR=$(shell sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < lib/lz4.h)
+LIBVER_MINOR=$(shell sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < lib/lz4.h)
+LIBVER_PATCH=$(shell sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < lib/lz4.h)
 LIBVER=$(LIBVER_MAJOR).$(LIBVER_MINOR).$(LIBVER_PATCH)
 
 ######################################################################
@@ -19,7 +19,7 @@ CC = $(CROSS)-gcc
 AR = $(CROSS)-ar
 LD = $(CROSS)-gcc
 
-CFLAGS ?= -O3 -std=gnu99 -Wall -Wextra -Wundef -Wshadow -Wcast-qual -Wcast-align -Wstrict-prototypes -pedantic -DLZ4_VERSION=\"$(RELEASE)\"
+CFLAGS ?= -O3 -std=gnu99 -Wall -Wextra -Wundef -Wshadow -Wcast-qual -Wcast-align -Wstrict-prototypes -Wpedantic -DLZ4_VERSION=\"$(RELEASE)\"
 LDFLAGS ?= -s
 SRC = programs/bench.c programs/lz4io.c programs/lz4cli.c
 OBJ = $(SRC:.c=.o)

contrib/gen_manual/Makefile

@@ -39,9 +39,9 @@ LZ4API = ../../lib/lz4.h
 LZ4MANUAL = ../../doc/lz4_manual.html
 LZ4FAPI = ../../lib/lz4frame.h
 LZ4FMANUAL = ../../doc/lz4frame_manual.html
-LIBVER_MAJOR_SCRIPT:=`sed -n '/define LZ4_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LZ4API)`
-LIBVER_MINOR_SCRIPT:=`sed -n '/define LZ4_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LZ4API)`
-LIBVER_PATCH_SCRIPT:=`sed -n '/define LZ4_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LZ4API)`
+LIBVER_MAJOR_SCRIPT:=`sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LZ4API)`
+LIBVER_MINOR_SCRIPT:=`sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LZ4API)`
+LIBVER_PATCH_SCRIPT:=`sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < $(LZ4API)`
 LIBVER_SCRIPT:= $(LIBVER_MAJOR_SCRIPT).$(LIBVER_MINOR_SCRIPT).$(LIBVER_PATCH_SCRIPT)
 LZ4VER := $(shell echo $(LIBVER_SCRIPT))
 

contrib/gen_manual/gen-lz4-manual.sh

@@ -1,8 +1,8 @@
 #!/bin/sh
 
-LIBVER_MAJOR_SCRIPT=`sed -n '/define LZ4_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ../../lib/lz4.h`
-LIBVER_MINOR_SCRIPT=`sed -n '/define LZ4_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ../../lib/lz4.h`
-LIBVER_PATCH_SCRIPT=`sed -n '/define LZ4_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ../../lib/lz4.h`
+LIBVER_MAJOR_SCRIPT=`sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_MAJOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ../../lib/lz4.h`
+LIBVER_MINOR_SCRIPT=`sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_MINOR/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ../../lib/lz4.h`
+LIBVER_PATCH_SCRIPT=`sed -n '/define[[:blank:]][[:blank:]]*LZ4_VERSION_RELEASE/s/.*[[:blank:]]\([0-9][0-9]*\).*/\1/p' < ../../lib/lz4.h`
 LIBVER_SCRIPT=$LIBVER_MAJOR_SCRIPT.$LIBVER_MINOR_SCRIPT.$LIBVER_PATCH_SCRIPT
 
 echo LZ4_VERSION=$LIBVER_SCRIPT

contrib/meson/meson/meson.build

@@ -1,67 +0,0 @@
-# #############################################################################
-# Copyright (c) 2018-present        lzutao <taolzu(at)gmail.com>
-# Copyright (c) 2022-present        Tristan Partin <tristan(at)partin.io>
-# All rights reserved.
-#
-# This source code is licensed under both the BSD-style license (found in the
-# LICENSE file in the root directory of this source tree) and the GPLv2 (found
-# in the COPYING file in the root directory of this source tree).
-# #############################################################################
-
-cc = meson.get_compiler('c')
-
-pkgconfig = import('pkgconfig')
-
-lz4_source_root = '../../..'
-
-lz4_version = meson.project_version()
-
-lz4_h_file = lz4_source_root / 'lib/lz4.h'
-GetLz4LibraryVersion_py = find_program('GetLz4LibraryVersion.py')
-lz4_version = run_command(GetLz4LibraryVersion_py, lz4_h_file, check: true).stdout().strip()
-message('Project version is now: @0@'.format(lz4_version))
-
-add_project_arguments('-DXXH_NAMESPACE=LZ4_', language: 'c')
-
-if get_option('debug')
-  add_project_arguments(cc.get_supported_arguments([
-        '-Wcast-qual',
-        '-Wcast-align',
-        '-Wshadow',
-        '-Wswitch-enum',
-        '-Wdeclaration-after-statement',
-        '-Wstrict-prototypes',
-        '-Wundef',
-        '-Wpointer-arith',
-        '-Wstrict-aliasing=1',
-        '-DLZ4_DEBUG=@0@'.format(get_option('debug-level')),
-      ]
-    ),
-    language: 'c',
-  )
-endif
-
-if get_option('memory-usage') > 0
-  add_project_arguments(
-    '-DLZ4_MEMORY_USAGE=@0@'.format(get_option('memory-usage')),
-    language: 'c'
-  )
-endif
-
-subdir('lib')
-
-if get_option('programs')
-  subdir('programs')
-endif
-
-if get_option('tests')
-  subdir('tests')
-endif
-
-if get_option('contrib')
-  subdir('contrib')
-endif
-
-if get_option('examples')
-  subdir('examples')
-endif

contrib/meson/meson/tests/meson.build

@@ -1,52 +0,0 @@
-# #############################################################################
-# Copyright (c) 2018-present        lzutao <taolzu(at)gmail.com>
-# Copyright (c) 2022-present        Tristan Partin <tristan(at)partin.io>
-# All rights reserved.
-#
-# This source code is licensed under both the BSD-style license (found in the
-# LICENSE file in the root directory of this source tree) and the GPLv2 (found
-# in the COPYING file in the root directory of this source tree).
-# #############################################################################
-
-lz4_source_root = '../../../..'
-
-exes = {
-  'fullbench': {
-    'sources': files(lz4_source_root / 'tests/fullbench.c'),
-    'include_directories': include_directories(lz4_source_root / 'programs'),
-  },
-  'fuzzer': {
-    'sources': files(lz4_source_root / 'tests/fuzzer.c'),
-    'include_directories': include_directories(lz4_source_root / 'programs'),
-  },
-  'frametest': {
-    'sources': files(lz4_source_root / 'tests/frametest.c'),
-    'include_directories': include_directories(lz4_source_root / 'programs'),
-  },
-  'roundTripTest': {
-    'sources': files(lz4_source_root / 'tests/roundTripTest.c'),
-  },
-  'datagen': {
-    'sources': files(lz4_source_root / 'tests/datagencli.c'),
-    'objects': lz4.extract_objects(lz4_source_root / 'programs/datagen.c'),
-    'include_directories': include_directories(lz4_source_root / 'programs'),
-  },
-  'checkFrame': {
-    'sources': files(lz4_source_root / 'tests/checkFrame.c'),
-    'include_directories': include_directories(lz4_source_root / 'programs'),
-  },
-  'checkTag': {
-    'sources': files(lz4_source_root / 'tests/checkTag.c'),
-  },
-}
-
-foreach e, attrs : exes
-  executable(
-    e,
-    attrs.get('sources'),
-    objects: attrs.get('objects', []),
-    dependencies: [liblz4_internal_dep],
-    include_directories: attrs.get('include_directories', []),
-    install: false
-  )
-endforeach

contrib/meson/meson_options.txt

@@ -1,24 +0,0 @@
-# #############################################################################
-# Copyright (c) 2018-present        lzutao <taolzu(at)gmail.com>
-# Copyright (c) 2022-present        Tristan Partin <tristan(at)partin.io>
-# All rights reserved.
-#
-# This source code is licensed under both the BSD-style license (found in the
-# LICENSE file in the root directory of this source tree) and the GPLv2 (found
-# in the COPYING file in the root directory of this source tree).
-# #############################################################################
-
-option('debug-level', type: 'integer', min: 0, max: 7, value: 1,
-  description: 'Enable run-time debug. See lib/lz4hc.c')
-option('unstable', type: 'boolean', value: false,
-  description: 'Expose unstable interfaces')
-option('programs', type: 'boolean', value: false,
-  description: 'Enable programs build')
-option('tests', type: 'boolean', value: false,
-  description: 'Enable tests build')
-option('contrib', type: 'boolean', value: false,
-  description: 'Enable contrib build')
-option('examples', type: 'boolean', value: false,
-  description: 'Enable examples build')
-option('memory-usage', type: 'integer', min: 0, value: 0,
-  description: 'See LZ4_MEMORY_USAGE. 0 means use the LZ4 default')

contrib/snap/snapcraft.yaml

@@ -1,5 +1,5 @@
 name: lz4
-version: 1.9.3 
+version: 1.9.4 
 summary: Extremely Fast Compression algorithm 
 description: >
     LZ4 is lossless compression algorithm, providing compression
@@ -20,6 +20,7 @@ description: >
     LZ4 library is provided as open-source software using BSD 2-Clause license.
 confinement: strict
 grade: stable
+base: core20
 
 apps:
   lz4:

doc/lz4_Frame_format.md

@@ -16,7 +16,7 @@ Distribution of this document is unlimited.
 
 ### Version
 
-1.6.2 (12/08/2020)
+1.6.4 (28/12/2023)
 
 
 Introduction
@@ -61,9 +61,9 @@ and associated error message explaining which parameter is unsupported.
 General Structure of LZ4 Frame format
 -------------------------------------
 
-| MagicNb | F. Descriptor | Block | (...) | EndMark | C. Checksum |
-|:-------:|:-------------:| ----- | ----- | ------- | ----------- |
-| 4 bytes |  3-15 bytes   |       |       | 4 bytes | 0-4 bytes   |
+| MagicNb | F. Descriptor | Data Block | (...) | EndMark | C. Checksum |
+|:-------:|:-------------:| ---------- | ----- | ------- | ----------- |
+| 4 bytes |  3-15 bytes   |            |       | 4 bytes | 0-4 bytes   |
 
 __Magic Number__
 
@@ -219,24 +219,26 @@ It can be skipped by a decoder, or used to validate content correctness.
 
 __Dictionary ID__
 
+A dictionary is useful to compress short input sequences.
+When present, the compressor can take advantage of dictionary's content
+as a kind of “known prefix” to encode the input in a more compact manner.
+
+When the frame descriptor defines independent blocks,
+every block is initialized with the same dictionary.
+If the frame descriptor defines linked blocks,
+the dictionary is only used once, at the beginning of the frame.
+
+The compressor and the decompressor must employ exactly the same dictionary for the data to be decodable.
+
+The Dict-ID field is offered as a way to help the decoder determine
+which dictionary must be used to correctly decode the compressed frame.
 Dict-ID is only present if the associated flag is set.
 It's an unsigned 32-bits value, stored using little-endian convention.
-A dictionary is useful to compress short input sequences.
-The compressor can take advantage of the dictionary context
-to encode the input in a more compact manner.
-It works as a kind of “known prefix” which is used by
-both the compressor and the decompressor to “warm-up” reference tables.
+Within a single frame, only a single Dict-ID field can be defined.
 
-The decompressor can use Dict-ID identifier to determine
-which dictionary must be used to correctly decode data.
-The compressor and the decompressor must use exactly the same dictionary.
-It's presumed that the 32-bits dictID uniquely identifies a dictionary.
-
-Within a single frame, a single dictionary can be defined.
-When the frame descriptor defines independent blocks,
-each block will be initialized with the same dictionary.
-If the frame descriptor defines linked blocks,
-the dictionary will only be used once, at the beginning of the frame.
+Note that the Dict-ID field is optional.
+Knowledge of which dictionary to employ can also be passed off-band,
+for example, it could be implied by the context of the application.
 
 __Header Checksum__
 
@@ -269,7 +271,7 @@ The size does not include the block checksum if present.
 
 _Block_Size_ shall never be larger than _Block_Maximum_Size_.
 Such an outcome could potentially happen for non-compressible sources.
-In such a case, such data block must be passed using uncompressed format.
+In such a case, such data block **must** be passed using uncompressed format.
 
 A value of `0x00000000` is invalid, and signifies an _EndMark_ instead.
 Note that this is different from a value of `0x80000000` (highest bit set),
@@ -356,7 +358,9 @@ Main characteristics of the legacy format :
 - All blocks are always compressed, even when compression is detrimental.
 - The last block is detected either because
   it is followed by the “EOF” (End of File) mark,
-  or because it is followed by a known Frame Magic Number.
+  or because it is followed by a known Frame Magic Number.<br>
+  In the Linux Kernel implementation, it can also be detected because it
+  is followed by a sequence of four zero bytes.
 - No checksum
 - Convention is Little endian
 
@@ -397,6 +401,10 @@ and trigger an error if it does not fit within acceptable range.
 Version changes
 ---------------
 
+1.6.4 : minor clarifications for Dictionaries
+
+1.6.3 : minor : clarify Data Block
+
 1.6.2 : clarifies specification of _EndMark_
 
 1.6.1 : introduced terms "LZ4 Frame Header" and "LZ4 Frame Footer"
@@ -427,6 +435,6 @@ Version changes
 
 0.6 : settled : stream size uses 8 bytes, endian convention is little endian
 
-0.5: added copyright notice
+0.5 : added copyright notice
 
 0.4 : changed format to Google Doc compatible OpenDocument

doc/lz4_manual.html

@@ -1,16 +1,16 @@
 <html>
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
-<title>1.9.4 Manual</title>
+<title>1.10.0 Manual</title>
 </head>
 <body>
-<h1>1.9.4 Manual</h1>
+<h1>1.10.0 Manual</h1>
 <hr>
 <a name="Contents"></a><h2>Contents</h2>
 <ol>
 <li><a href="#Chapter1">Introduction</a></li>
 <li><a href="#Chapter2">Version</a></li>
-<li><a href="#Chapter3">Tuning parameter</a></li>
+<li><a href="#Chapter3">Tuning memory usage</a></li>
 <li><a href="#Chapter4">Simple Functions</a></li>
 <li><a href="#Chapter5">Advanced Functions</a></li>
 <li><a href="#Chapter6">Streaming Compression Functions</a></li>
@@ -83,15 +83,16 @@
 </b></pre><BR>
 <pre><b>const char* LZ4_versionString (void);   </b>/**< library version string; useful to check dll version; requires v1.7.5+ */<b>
 </b></pre><BR>
-<a name="Chapter3"></a><h2>Tuning parameter</h2><pre></pre>
+<a name="Chapter3"></a><h2>Tuning memory usage</h2><pre></pre>
 
 <pre><b>#ifndef LZ4_MEMORY_USAGE
 # define LZ4_MEMORY_USAGE LZ4_MEMORY_USAGE_DEFAULT
 #endif
-</b><p> Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; )
- Increasing memory usage improves compression ratio, at the cost of speed.
+</b><p> Can be selected at compile time, by setting LZ4_MEMORY_USAGE.
+ Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB)
+ Increasing memory usage improves compression ratio, generally at the cost of speed.
  Reduced memory usage may improve speed at the cost of ratio, thanks to better cache locality.
- Default value is 14, for 16KB, which nicely fits into Intel x86 L1 cache
+ Default value is 14, for 16KB, which nicely fits into most L1 caches.
  
 </p></pre><BR>
 
@@ -114,8 +115,9 @@
 </p></pre><BR>
 
 <pre><b>int LZ4_decompress_safe (const char* src, char* dst, int compressedSize, int dstCapacity);
-</b><p>  compressedSize : is the exact complete size of the compressed block.
-  dstCapacity : is the size of destination buffer (which must be already allocated), presumed an upper bound of decompressed size.
+</b><p> @compressedSize : is the exact complete size of the compressed block.
+ @dstCapacity : is the size of destination buffer (which must be already allocated),
+                presumed an upper bound of decompressed size.
  @return : the number of bytes decompressed into destination buffer (necessarily <= dstCapacity)
            If destination buffer is not large enough, decoding will stop and output an error code (negative value).
            If the source stream is detected malformed, the function will stop decoding and return a negative result.
@@ -159,22 +161,25 @@ int LZ4_compress_fast_extState (void* state, const char* src, char* dst, int src
  
 </p></pre><BR>
 
-<pre><b>int LZ4_compress_destSize (const char* src, char* dst, int* srcSizePtr, int targetDstSize);
+<pre><b>int LZ4_compress_destSize(const char* src, char* dst, int* srcSizePtr, int targetDstSize);
 </b><p>  Reverse the logic : compresses as much data as possible from 'src' buffer
-  into already allocated buffer 'dst', of size >= 'targetDestSize'.
+  into already allocated buffer 'dst', of size >= 'dstCapacity'.
   This function either compresses the entire 'src' content into 'dst' if it's large enough,
   or fill 'dst' buffer completely with as much data as possible from 'src'.
   note: acceleration parameter is fixed to "default".
 
- *srcSizePtr : will be modified to indicate how many bytes where read from 'src' to fill 'dst'.
+ *srcSizePtr : in+out parameter. Initially contains size of input.
+               Will be modified to indicate how many bytes where read from 'src' to fill 'dst'.
                New value is necessarily <= input value.
- @return : Nb bytes written into 'dst' (necessarily <= targetDestSize)
+ @return : Nb bytes written into 'dst' (necessarily <= dstCapacity)
            or 0 if compression fails.
 
- Note : from v1.8.2 to v1.9.1, this function had a bug (fixed un v1.9.2+):
-        the produced compressed content could, in specific circumstances,
-        require to be decompressed into a destination buffer larger
-        by at least 1 byte than the content to decompress.
+ Note : 'targetDstSize' must be >= 1, because it's the smallest valid lz4 payload.
+
+ Note 2:from v1.8.2 to v1.9.1, this function had a bug (fixed in v1.9.2+):
+        the produced compressed content could, in rare circumstances,
+        require to be decompressed into a destination buffer
+        larger by at least 1 byte than decompressesSize.
         If an application uses `LZ4_compress_destSize()`,
         it's highly recommended to update liblz4 to v1.9.2 or better.
         If this can't be done or ensured,
@@ -222,6 +227,24 @@ int LZ4_compress_fast_extState (void* state, const char* src, char* dst, int src
 
 <a name="Chapter6"></a><h2>Streaming Compression Functions</h2><pre></pre>
 
+<pre><b>#if !defined(RC_INVOKED) </b>/* https://docs.microsoft.com/en-us/windows/win32/menurc/predefined-macros */<b>
+#if !defined(LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION)
+LZ4_stream_t* LZ4_createStream(void);
+int           LZ4_freeStream (LZ4_stream_t* streamPtr);
+#endif </b>/* !defined(LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION) */<b>
+#endif
+</b><p>
+ - RC_INVOKED is predefined symbol of rc.exe (the resource compiler which is part of MSVC/Visual Studio).
+   https://docs.microsoft.com/en-us/windows/win32/menurc/predefined-macros
+
+ - Since rc.exe is a legacy compiler, it truncates long symbol (> 30 chars)
+   and reports warning "RC4011: identifier truncated".
+
+ - To eliminate the warning, we surround long preprocessor symbol with
+   "#if !defined(RC_INVOKED) ... #endif" block that means
+   "skip this block when rc.exe is trying to read it".
+</p></pre><BR>
+
 <pre><b>void LZ4_resetStream_fast (LZ4_stream_t* streamPtr);
 </b><p>  Use this to prepare an LZ4_stream_t for a new chain of dependent blocks
   (e.g., LZ4_compress_fast_continue()).
@@ -252,10 +275,55 @@ int LZ4_compress_fast_extState (void* state, const char* src, char* dst, int src
   LZ4_loadDict() triggers a reset, so any previous data will be forgotten.
   The same dictionary will have to be loaded on decompression side for successful decoding.
   Dictionary are useful for better compression of small data (KB range).
-  While LZ4 accept any input as dictionary,
-  results are generally better when using Zstandard's Dictionary Builder.
+  While LZ4 itself accepts any input as dictionary, dictionary efficiency is also a topic.
+  When in doubt, employ the Zstandard's Dictionary Builder.
   Loading a size of 0 is allowed, and is the same as reset.
- @return : loaded dictionary size, in bytes (necessarily <= 64 KB)
+ @return : loaded dictionary size, in bytes (note: only the last 64 KB are loaded)
+ 
+</p></pre><BR>
+
+<pre><b>int LZ4_loadDictSlow(LZ4_stream_t* streamPtr, const char* dictionary, int dictSize);
+</b><p>  Same as LZ4_loadDict(),
+  but uses a bit more cpu to reference the dictionary content more thoroughly.
+  This is expected to slightly improve compression ratio.
+  The extra-cpu cost is likely worth it if the dictionary is re-used across multiple sessions.
+ @return : loaded dictionary size, in bytes (note: only the last 64 KB are loaded)
+ 
+</p></pre><BR>
+
+<pre><b>void
+LZ4_attach_dictionary(LZ4_stream_t* workingStream,
+                const LZ4_stream_t* dictionaryStream);
+</b><p>
+  This allows efficient re-use of a static dictionary multiple times.
+
+  Rather than re-loading the dictionary buffer into a working context before
+  each compression, or copying a pre-loaded dictionary's LZ4_stream_t into a
+  working LZ4_stream_t, this function introduces a no-copy setup mechanism,
+  in which the working stream references @dictionaryStream in-place.
+
+  Several assumptions are made about the state of @dictionaryStream.
+  Currently, only states which have been prepared by LZ4_loadDict() or
+  LZ4_loadDictSlow() should be expected to work.
+
+  Alternatively, the provided @dictionaryStream may be NULL,
+  in which case any existing dictionary stream is unset.
+
+  If a dictionary is provided, it replaces any pre-existing stream history.
+  The dictionary contents are the only history that can be referenced and
+  logically immediately precede the data compressed in the first subsequent
+  compression call.
+
+  The dictionary will only remain attached to the working stream through the
+  first compression call, at the end of which it is cleared.
+ @dictionaryStream stream (and source buffer) must remain in-place / accessible / unchanged
+  through the completion of the compression session.
+
+  Note: there is no equivalent LZ4_attach_*() method on the decompression side
+  because there is no initialization cost, hence no need to share the cost across multiple sessions.
+  To decompress LZ4 blocks using dictionary, attached or not,
+  just employ the regular LZ4_setStreamDecode() for streaming,
+  or the stateless LZ4_decompress_safe_usingDict() for one-shot decompression.
  
 </p></pre><BR>
 
@@ -296,10 +364,12 @@ int LZ4_compress_fast_extState (void* state, const char* src, char* dst, int src
 <a name="Chapter7"></a><h2>Streaming Decompression Functions</h2><pre>  Bufferless synchronous API
 <BR></pre>
 
-<pre><b>#if !defined(LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION)
+<pre><b>#if !defined(RC_INVOKED) </b>/* https://docs.microsoft.com/en-us/windows/win32/menurc/predefined-macros */<b>
+#if !defined(LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION)
 LZ4_streamDecode_t* LZ4_createStreamDecode(void);
 int                 LZ4_freeStreamDecode (LZ4_streamDecode_t* LZ4_stream);
 #endif </b>/* !defined(LZ4_STATIC_LINKING_ONLY_DISABLE_MEMORY_ALLOCATION) */<b>
+#endif
 </b><p>  creation / destruction of streaming decompression tracking context.
   A tracking context can be re-used multiple times.
  
@@ -332,10 +402,23 @@ int                 LZ4_freeStreamDecode (LZ4_streamDecode_t* LZ4_stream);
 LZ4_decompress_safe_continue (LZ4_streamDecode_t* LZ4_streamDecode,
                         const char* src, char* dst,
                         int srcSize, int dstCapacity);
-</b><p>  These decoding functions allow decompression of consecutive blocks in "streaming" mode.
-  A block is an unsplittable entity, it must be presented entirely to a decompression function.
-  Decompression functions only accepts one block at a time.
-  The last 64KB of previously decoded data *must* remain available and unmodified at the memory position where they were decoded.
+</b><p>  This decoding function allows decompression of consecutive blocks in "streaming" mode.
+  The difference with the usual independent blocks is that
+  new blocks are allowed to find references into former blocks.
+  A block is an unsplittable entity, and must be presented entirely to the decompression function.
+  LZ4_decompress_safe_continue() only accepts one block at a time.
+  It's modeled after `LZ4_decompress_safe()` and behaves similarly.
+
+ @LZ4_streamDecode : decompression state, tracking the position in memory of past data
+ @compressedSize : exact complete size of one compressed block.
+ @dstCapacity : size of destination buffer (which must be already allocated),
+                must be an upper bound of decompressed size.
+ @return : number of bytes decompressed into destination buffer (necessarily <= dstCapacity)
+           If destination buffer is not large enough, decoding will stop and output an error code (negative value).
+           If the source stream is detected malformed, the function will stop decoding and return a negative result.
+
+  The last 64KB of previously decoded data *must* remain available and unmodified
+  at the memory position where they were previously decoded.
   If less than 64KB of data has been decoded, all the data must be present.
 
   Special : if decompression side sets a ring buffer, it must respect one of the following conditions :
@@ -361,15 +444,27 @@ LZ4_decompress_safe_continue (LZ4_streamDecode_t* LZ4_streamDecode,
 LZ4_decompress_safe_usingDict(const char* src, char* dst,
                               int srcSize, int dstCapacity,
                               const char* dictStart, int dictSize);
-</b><p>  These decoding functions work the same as
-  a combination of LZ4_setStreamDecode() followed by LZ4_decompress_*_continue()
-  They are stand-alone, and don't need an LZ4_streamDecode_t structure.
+</b><p>  Works the same as
+  a combination of LZ4_setStreamDecode() followed by LZ4_decompress_safe_continue()
+  However, it's stateless: it doesn't need any LZ4_streamDecode_t state.
   Dictionary is presumed stable : it must remain accessible and unmodified during decompression.
   Performance tip : Decompression speed can be substantially increased
                     when dst == dictStart + dictSize.
  
 </p></pre><BR>
 
+<pre><b>int
+LZ4_decompress_safe_partial_usingDict(const char* src, char* dst,
+                                      int compressedSize,
+                                      int targetOutputSize, int maxOutputSize,
+                                      const char* dictStart, int dictSize);
+</b><p>  Behaves the same as LZ4_decompress_safe_partial()
+  with the added ability to specify a memory segment for past data.
+  Performance tip : Decompression speed can be substantially increased
+                    when dst == dictStart + dictSize.
+ 
+</p></pre><BR>
+
 <a name="Chapter8"></a><h2>Experimental section</h2><pre>
  Symbols declared in this section must be considered unstable. Their
  signatures or semantics may change, or they may be removed altogether in the
@@ -400,33 +495,9 @@ LZ4_decompress_safe_usingDict(const char* src, char* dst,
  
 </p></pre><BR>
 
-<pre><b>LZ4LIB_STATIC_API void
-LZ4_attach_dictionary(LZ4_stream_t* workingStream,
-                const LZ4_stream_t* dictionaryStream);
-</b><p>  This is an experimental API that allows
-  efficient use of a static dictionary many times.
-
-  Rather than re-loading the dictionary buffer into a working context before
-  each compression, or copying a pre-loaded dictionary's LZ4_stream_t into a
-  working LZ4_stream_t, this function introduces a no-copy setup mechanism,
-  in which the working stream references the dictionary stream in-place.
-
-  Several assumptions are made about the state of the dictionary stream.
-  Currently, only streams which have been prepared by LZ4_loadDict() should
-  be expected to work.
-
-  Alternatively, the provided dictionaryStream may be NULL,
-  in which case any existing dictionary stream is unset.
-
-  If a dictionary is provided, it replaces any pre-existing stream history.
-  The dictionary contents are the only history that can be referenced and
-  logically immediately precede the data compressed in the first subsequent
-  compression call.
-
-  The dictionary will only remain attached to the working stream through the
-  first compression call, at the end of which it is cleared. The dictionary
-  stream (and source buffer) must remain in-place / accessible / unchanged
-  through the completion of the first compression call on the stream.
+<pre><b>int LZ4_compress_destSize_extState(void* state, const char* src, char* dst, int* srcSizePtr, int targetDstSize, int acceleration);
+</b><p>  Same as LZ4_compress_destSize(), but using an externally allocated state.
+  Also: exposes @acceleration
  
 </p></pre><BR>
 
@@ -496,7 +567,7 @@ LZ4_attach_dictionary(LZ4_stream_t* workingStream,
   If you need static allocation, declare or allocate an LZ4_stream_t object.
 </p></pre><BR>
 
-<pre><b>LZ4_stream_t* LZ4_initStream (void* buffer, size_t size);
+<pre><b>LZ4_stream_t* LZ4_initStream (void* stateBuffer, size_t size);
 </b><p>  An LZ4_stream_t structure must be initialized at least once.
   This is automatically done when invoking LZ4_createStream(),
   but it's not when the structure is simply declared on stack (for example).
@@ -568,11 +639,12 @@ LZ4_DEPRECATED("use LZ4_decompress_safe() instead") LZ4LIB_API int LZ4_uncompres
 LZ4_DEPRECATED("use LZ4_decompress_fast_usingDict() instead") LZ4LIB_API int LZ4_decompress_fast_withPrefix64k (const char* src, char* dst, int originalSize);
 </b><p></p></pre><BR>
 
-<pre><b>LZ4_DEPRECATED("This function is deprecated and unsafe. Consider using LZ4_decompress_safe() instead")
+<pre><b>LZ4_DEPRECATED("This function is deprecated and unsafe. Consider using LZ4_decompress_safe_partial() instead")
 int LZ4_decompress_fast (const char* src, char* dst, int originalSize);
-LZ4_DEPRECATED("This function is deprecated and unsafe. Consider using LZ4_decompress_safe_continue() instead")
+LZ4_DEPRECATED("This function is deprecated and unsafe. Consider migrating towards LZ4_decompress_safe_continue() instead. "
+               "Note that the contract will change (requires block's compressed size, instead of decompressed size)")
 int LZ4_decompress_fast_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* src, char* dst, int originalSize);
-LZ4_DEPRECATED("This function is deprecated and unsafe. Consider using LZ4_decompress_safe_usingDict() instead")
+LZ4_DEPRECATED("This function is deprecated and unsafe. Consider using LZ4_decompress_safe_partial_usingDict() instead")
 int LZ4_decompress_fast_usingDict (const char* src, char* dst, int originalSize, const char* dictStart, int dictSize);
 </b><p>  These functions used to be faster than LZ4_decompress_safe(),
   but this is no longer the case. They are now slower.