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166 lines
6.8 KiB
166 lines
6.8 KiB
# - Find bison 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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# BISON_EXECUTABLE - path to the bison program
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# BISON_VERSION - version of bison
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# BISON_FOUND - true if the program was found
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#
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# The minimum required version of bison can be specified using the
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# standard CMake syntax, e.g. find_package(BISON 2.1.3)
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#
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# If bison is found, the module defines the macros:
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# BISON_TARGET(<Name> <YaccInput> <CodeOutput> [VERBOSE <file>]
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# [COMPILE_FLAGS <string>])
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# which will create a custom rule to generate a parser. <YaccInput> is
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# the path to a yacc file. <CodeOutput> is the name of the source file
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# generated by bison. A header file is also be generated, and contains
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# the token list. If COMPILE_FLAGS option is specified, the next
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# parameter is added in the bison command line. if VERBOSE option is
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# specified, <file> is created and contains verbose descriptions of the
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# grammar and parser. The macro defines a set of variables:
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# BISON_${Name}_DEFINED - true is the macro ran successfully
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# BISON_${Name}_INPUT - The input source file, an alias for <YaccInput>
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# BISON_${Name}_OUTPUT_SOURCE - The source file generated by bison
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# BISON_${Name}_OUTPUT_HEADER - The header file generated by bison
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# BISON_${Name}_OUTPUTS - The sources files generated by bison
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# BISON_${Name}_COMPILE_FLAGS - Options used in the bison 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(BISON)
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# BISON_TARGET(MyParser parser.y ${CMAKE_CURRENT_BINARY_DIR}/parser.cpp)
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# add_executable(Foo main.cpp ${BISON_MyParser_OUTPUTS})
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# ====================================================================
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#=============================================================================
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# Copyright 2009 Kitware, Inc.
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# Copyright 2006 Tristan Carel
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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FIND_PROGRAM(BISON_EXECUTABLE bison DOC "path to the bison executable")
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MARK_AS_ADVANCED(BISON_EXECUTABLE)
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IF(BISON_EXECUTABLE)
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# the bison commands should be executed with the C locale, otherwise
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# the message (which are parsed) may be translated
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SET(_Bison_SAVED_LC_ALL "$ENV{LC_ALL}")
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SET(ENV{LC_ALL} C)
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EXECUTE_PROCESS(COMMAND ${BISON_EXECUTABLE} --version
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OUTPUT_VARIABLE BISON_version_output
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ERROR_VARIABLE BISON_version_error
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RESULT_VARIABLE BISON_version_result
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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SET(ENV{LC_ALL} ${_Bison_SAVED_LC_ALL})
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IF(NOT ${BISON_version_result} EQUAL 0)
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MESSAGE(SEND_ERROR "Command \"${BISON_EXECUTABLE} --version\" failed with output:\n${BISON_version_error}")
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ELSE()
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STRING(REGEX REPLACE "^bison \\(GNU Bison\\) ([^\n]+)\n.*" "\\1"
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BISON_VERSION "${BISON_version_output}")
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ENDIF()
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# internal macro
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MACRO(BISON_TARGET_option_verbose Name BisonOutput filename)
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LIST(APPEND BISON_TARGET_cmdopt "--verbose")
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GET_FILENAME_COMPONENT(BISON_TARGET_output_path "${BisonOutput}" PATH)
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GET_FILENAME_COMPONENT(BISON_TARGET_output_name "${BisonOutput}" NAME_WE)
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ADD_CUSTOM_COMMAND(OUTPUT ${filename}
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COMMAND ${CMAKE_COMMAND}
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ARGS -E copy
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"${BISON_TARGET_output_path}/${BISON_TARGET_output_name}.output"
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"${filename}"
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DEPENDS
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"${BISON_TARGET_output_path}/${BISON_TARGET_output_name}.output"
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COMMENT "[BISON][${Name}] Copying bison verbose table to ${filename}"
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WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
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SET(BISON_${Name}_VERBOSE_FILE ${filename})
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LIST(APPEND BISON_TARGET_extraoutputs
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"${BISON_TARGET_output_path}/${BISON_TARGET_output_name}.output")
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ENDMACRO(BISON_TARGET_option_verbose)
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# internal macro
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MACRO(BISON_TARGET_option_extraopts Options)
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SET(BISON_TARGET_extraopts "${Options}")
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SEPARATE_ARGUMENTS(BISON_TARGET_extraopts)
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LIST(APPEND BISON_TARGET_cmdopt ${BISON_TARGET_extraopts})
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ENDMACRO(BISON_TARGET_option_extraopts)
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#============================================================
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# BISON_TARGET (public macro)
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#============================================================
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#
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MACRO(BISON_TARGET Name BisonInput BisonOutput)
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SET(BISON_TARGET_output_header "")
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SET(BISON_TARGET_cmdopt "")
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SET(BISON_TARGET_outputs "${BisonOutput}")
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IF(NOT ${ARGC} EQUAL 3 AND NOT ${ARGC} EQUAL 5 AND NOT ${ARGC} EQUAL 7)
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MESSAGE(SEND_ERROR "Usage")
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ELSE()
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# Parsing parameters
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IF(${ARGC} GREATER 5 OR ${ARGC} EQUAL 5)
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IF("${ARGV3}" STREQUAL "VERBOSE")
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BISON_TARGET_option_verbose(${Name} ${BisonOutput} "${ARGV4}")
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ENDIF()
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IF("${ARGV3}" STREQUAL "COMPILE_FLAGS")
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BISON_TARGET_option_extraopts("${ARGV4}")
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ENDIF()
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ENDIF()
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IF(${ARGC} EQUAL 7)
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IF("${ARGV5}" STREQUAL "VERBOSE")
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BISON_TARGET_option_verbose(${Name} ${BisonOutput} "${ARGV6}")
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ENDIF()
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IF("${ARGV5}" STREQUAL "COMPILE_FLAGS")
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BISON_TARGET_option_extraopts("${ARGV6}")
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ENDIF()
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ENDIF()
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# Header's name generated by bison (see option -d)
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LIST(APPEND BISON_TARGET_cmdopt "-d")
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STRING(REGEX REPLACE "^(.*)(\\.[^.]*)$" "\\2" _fileext "${ARGV2}")
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STRING(REPLACE "c" "h" _fileext ${_fileext})
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STRING(REGEX REPLACE "^(.*)(\\.[^.]*)$" "\\1${_fileext}"
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BISON_${Name}_OUTPUT_HEADER "${ARGV2}")
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LIST(APPEND BISON_TARGET_outputs "${BISON_${Name}_OUTPUT_HEADER}")
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ADD_CUSTOM_COMMAND(OUTPUT ${BISON_TARGET_outputs}
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${BISON_TARGET_extraoutputs}
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COMMAND ${BISON_EXECUTABLE}
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ARGS ${BISON_TARGET_cmdopt} -o ${ARGV2} ${ARGV1}
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DEPENDS ${ARGV1}
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COMMENT "[BISON][${Name}] Building parser with bison ${BISON_VERSION}"
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WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
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# define target variables
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SET(BISON_${Name}_DEFINED TRUE)
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SET(BISON_${Name}_INPUT ${ARGV1})
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SET(BISON_${Name}_OUTPUTS ${BISON_TARGET_outputs})
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SET(BISON_${Name}_COMPILE_FLAGS ${BISON_TARGET_cmdopt})
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SET(BISON_${Name}_OUTPUT_SOURCE "${BisonOutput}")
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ENDIF(NOT ${ARGC} EQUAL 3 AND NOT ${ARGC} EQUAL 5 AND NOT ${ARGC} EQUAL 7)
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ENDMACRO(BISON_TARGET)
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#
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#============================================================
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ENDIF(BISON_EXECUTABLE)
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INCLUDE(FindPackageHandleStandardArgs)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(BISON REQUIRED_VARS BISON_EXECUTABLE
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VERSION_VAR BISON_VERSION)
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# FindBISON.cmake ends here
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