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