Clifford Yapp
ae18190f69
This is a classic problem - the file copy will begin, the file will be "present" in some sense on the file system, and build steps that need it will begin - but they won't find what they actually need because the copy isn't fully executed. The standard approach for this is to add a second file which is only created after the first is done, and then make the target depend on the second file rather than the first.
190 lines
7.4 KiB
CMake
190 lines
7.4 KiB
CMake
#
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# - Find lemon executable and provides macros to generate custom build rules
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# The module defines the following variables
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#
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# LEMON_EXECUTABLE - path to the lemon program
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# LEMON_TEMPLATE - location of the lemon template file
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#=============================================================================
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# F I N D L E M O N . C M A K E
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#
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# Originally based off of FindBISON.cmake from Kitware's CMake distribution
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#
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# Copyright (c) 2010-2016 United States Government as represented by
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# the U.S. Army Research Laboratory.
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# Copyright 2009 Kitware, Inc.
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# Copyright 2006 Tristan Carel
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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#
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# * The names of the authors may not be used to endorse or promote
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# products derived from this software without specific prior written
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# permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#=============================================================================
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find_program(LEMON_EXECUTABLE lemon DOC "path to the lemon executable")
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mark_as_advanced(LEMON_EXECUTABLE)
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if (LEMON_EXECUTABLE)
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if(NOT LEMON_TEMPLATE)
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# look for the template, if we've not already been told where it is
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if (DATA_DIR AND EXISTS "${DATA_DIR}/lemon/lempar.c")
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find_file(LEMON_TEMPLATE lempar.c
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PATHS "${DATA_DIR}/lemon/lempar.c"
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NO_DEFAULT_PATH)
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endif ()
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# If the above did not succeed, check standard locations
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get_filename_component(lemon_dir ${LEMON_EXECUTABLE} DIRECTORY)
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find_file(LEMON_TEMPLATE lempar.c
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PATHS "${lemon_dir}" "/usr/share/lemon"
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NO_DEFAULT_PATH)
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mark_as_advanced(LEMON_TEMPLATE)
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endif()
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# We need a template to be able to use lemon correctly
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if(NOT LEMON_TEMPLATE)
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message(FATAL_ERROR "Failed to find lemon template file (lempar.c) - need to set LEMON_TEMPLATE")
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endif()
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# Define the function
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# LEMON_TARGET(<Name> <LemonInput> <LemonSource> <LemonHeader>
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# [<ArgString>])
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# which will create a custom rule to generate a parser. <LemonInput> is
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# the path to a lemon file. <LemonSource> is the desired name for the
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# generated source file. <LemonHeader> is the desired name for the
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# generated header which contains the token list. Anything in the optional
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# <ArgString> parameter is appended to the lemon command line.
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#
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# ====================================================================
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# Example:
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#
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# find_package(LEMON)
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# LEMON_TARGET(MyParser parser.y parser.c parser.h)
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# add_executable(Foo main.cpp ${LEMON_MyParser_OUTPUTS})
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# ====================================================================
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include(CMakeParseArguments)
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if(NOT COMMAND LEMON_TARGET)
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function(LEMON_TARGET Name LemonInput LemonOutput)
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set(LT_ARGS DEFINES_FILE COMPILE_FLAGS)
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cmake_parse_arguments(LEMON_TARGET_ARG "" "${LT_ARGS}" "" ${ARGN})
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if(NOT "${LEMON_TARGET_ARG_COMPILE_FLAGS}" STREQUAL "")
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set(LEMON_EXECUTABLE_opts "${LEMON_TARGET_ARG_COMPILE_FLAGS}")
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separate_arguments(LEMON_EXECUTABLE_opts)
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else()
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set(LEMON_EXECUTABLE_opts "")
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endif()
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# check for LemonOutput
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get_filename_component(_basename ${LemonOutput} NAME_WE)
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get_filename_component(_out_src_file ${LemonOutput} NAME)
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get_filename_component(_out_dir ${LemonOutput} PATH)
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if(NOT "${_out_dir}" STREQUAL "")
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message(WARNING "Full path specified for LemonOutput - should be filename only")
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endif()
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# set report file
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set(_out_rpt_file "${_basename}.out")
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# check for DEFINES_FILE
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if ("${LEMON_TARGET_ARG_DEFINES_FILE}" STREQUAL "")
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set(_out_hdr_file "${_basename}.h")
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else()
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get_filename_component(_out_dir ${LEMON_TARGET_ARG_DEFINES_FILE} PATH)
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get_filename_component(_out_hdr_file ${LEMON_TARGET_ARG_DEFINES_FILE} NAME)
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if(NOT "${_out_dir}" STREQUAL "")
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message(WARNING "Full path specified for DEFINES_FILE - should be filename only")
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endif()
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endif()
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# input file
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get_filename_component(_in_y_path ${LemonInput} ABSOLUTE)
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get_filename_component(_in_y_file ${LemonInput} NAME)
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# Stage the source file in the binary directory for lemon. We need to make
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# sure it's fully copied, so use a sentinel guard
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add_custom_command(
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OUTPUT ${_in_y_file}
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COMMAND ${CMAKE_COMMAND} -E copy ${_in_y_path} ${CMAKE_CURRENT_BINARY_DIR}
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)
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add_custom_command(
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OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${_in_y_file}.sentinel
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COMMAND ${CMAKE_COMMAND} -E touch ${CMAKE_CURRENT_BINARY_DIR}/${_in_y_file}.sentinel
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DEPENDS ${_in_y_file}
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)
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add_custom_target(${Name}_input_cpy DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${_in_y_file}.sentinel)
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# execute lemon
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add_custom_command(
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OUTPUT ${_out_src_file}
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COMMAND ${LEMON_EXECUTABLE} -T${LEMON_TEMPLATE} ${LEMON_EXECUTABLE_opts} ${_in_y_file}
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DEPENDS ${Name}_input_cpy
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WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
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COMMENT "[LEMON][${Name}] Building parser with ${LEMON_EXECUTABLE}"
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)
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# rename the header
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add_custom_command(
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OUTPUT ${_out_hdr_file}
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COMMAND ${CMAKE_COMMAND} ARGS -E rename ${_basename}.h ${_out_hdr_file}
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DEPENDS ${_out_src_file}
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WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
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)
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# set the return values
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# TODO: for generated sources even headers should be target dependencies
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set(LEMON_${Name}_DEFINED TRUE PARENT_SCOPE)
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set(LEMON_${Name}_OUTPUT_HEADER "${CMAKE_CURRENT_BINARY_DIR}/${_out_hdr_file}" PARENT_SCOPE)
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set(LEMON_${Name}_INCLUDE_DIR "${CMAKE_CURRENT_BINARY_DIR}" PARENT_SCOPE)
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set(LEMON_${Name}_OUTPUTS "${_out_src_file}" PARENT_SCOPE)
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# TODO - remove once perplex goes away...
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add_custom_target(${Name} DEPENDS ${_out_hdr_file})
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# make sure we clean up generated output and copied input
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set_property(DIRECTORY APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES "${_out_src_file}")
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set_property(DIRECTORY APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES "${CMAKE_CURRENT_BINARY_DIR}/${_in_y_file}")
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endfunction(LEMON_TARGET)
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endif(NOT COMMAND LEMON_TARGET)
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endif(LEMON_EXECUTABLE)
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(LEMON REQUIRED_VARS LEMON_EXECUTABLE LEMON_TEMPLATE)
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#============================================================
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# FindLEMON.cmake ends here
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# Local Variables:
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# tab-width: 8
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# mode: cmake
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# indent-tabs-mode: t
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# End:
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# ex: shiftwidth=2 tabstop=8
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