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Diffstat (limited to 'Modules/FindBISON.cmake')
| -rw-r--r-- | Modules/FindBISON.cmake | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/Modules/FindBISON.cmake b/Modules/FindBISON.cmake new file mode 100644 index 0000000..7d81276 --- /dev/null +++ b/Modules/FindBISON.cmake @@ -0,0 +1,229 @@ +#.rst: +# FindBISON +# --------- +# +# Find ``bison`` executable and provide a macro 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 macro:: +# +# BISON_TARGET(<Name> <YaccInput> <CodeOutput> +# [COMPILE_FLAGS <flags>] +# [DEFINES_FILE <file>] +# [VERBOSE <file>] +# ) +# +# which will create a custom rule to generate a parser. ``<YaccInput>`` is +# the path to a yacc file. ``<CodeOutput>`` is the name of the source file +# generated by bison. A header file is also be generated, and contains +# the token list. +# +# The options are: +# +# ``COMPILE_FLAGS <flags>`` +# Specify flags to be added to the ``bison`` command line. +# +# ``DEFINES_FILE <file>`` +# Specify a non-default header ``<file>`` to be generated by ``bison``. +# +# ``VERBOSE <file>`` +# Tell ``bison`` to write verbose descriptions of the grammar and +# parser to the given ``<file>``. +# +# The macro defines the following variables: +# +# ``BISON_<Name>_DEFINED`` +# true is the macro ran successfully +# +# ``BISON_<Name>_INPUT`` +# The input source file, an alias for <YaccInput> +# +# ``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 usage: +# +# .. code-block:: cmake +# +# find_package(BISON) +# BISON_TARGET(MyParser parser.y ${CMAKE_CURRENT_BINARY_DIR}/parser.cpp +# DEFINES_FILE ${CMAKE_CURRENT_BINARY_DIR}/parser.h) +# add_executable(Foo main.cpp ${BISON_MyParser_OUTPUTS}) + +#============================================================================= +# Copyright 2009 Kitware, Inc. +# Copyright 2006 Tristan Carel +# +# Distributed under the OSI-approved BSD License (the "License"); +# see accompanying file Copyright.txt for details. +# +# This software is distributed WITHOUT ANY WARRANTY; without even the +# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +# See the License for more information. +#============================================================================= +# (To distribute this file outside of CMake, substitute the full +# License text for the above reference.) + +find_program(BISON_EXECUTABLE NAMES bison win_bison DOC "path to the bison executable") +mark_as_advanced(BISON_EXECUTABLE) + +include(CMakeParseArguments) + +if(BISON_EXECUTABLE) + # the bison commands should be executed with the C locale, otherwise + # the message (which are parsed) may be translated + set(_Bison_SAVED_LC_ALL "$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${BISON_version_error}") + else() + # Bison++ + if("${BISON_version_output}" MATCHES "^bison\\+\\+ Version ([^,]+)") + set(BISON_VERSION "${CMAKE_MATCH_1}") + # GNU Bison + elseif("${BISON_version_output}" MATCHES "^bison \\(GNU Bison\\) ([^\n]+)\n") + set(BISON_VERSION "${CMAKE_MATCH_1}") + elseif("${BISON_version_output}" MATCHES "^GNU Bison (version )?([^\n]+)") + set(BISON_VERSION "${CMAKE_MATCH_2}") + endif() + endif() + + # internal macro + macro(BISON_TARGET_option_verbose Name BisonOutput filename) + list(APPEND BISON_TARGET_cmdopt "--verbose") + get_filename_component(BISON_TARGET_output_path "${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}/${BISON_TARGET_output_name}.output") + endmacro() + + # internal macro + macro(BISON_TARGET_option_extraopts Options) + set(BISON_TARGET_extraopts "${Options}") + separate_arguments(BISON_TARGET_extraopts) + list(APPEND BISON_TARGET_cmdopt ${BISON_TARGET_extraopts}) + endmacro() + + # internal macro + macro(BISON_TARGET_option_defines Header) + set(BISON_TARGET_output_header "${Header}") + list(APPEND BISON_TARGET_cmdopt --defines=${BISON_TARGET_output_header}) + endmacro() + + #============================================================ + # BISON_TARGET (public macro) + #============================================================ + # + macro(BISON_TARGET Name BisonInput BisonOutput) + set(BISON_TARGET_output_header "") + set(BISON_TARGET_cmdopt "") + set(BISON_TARGET_outputs "${BisonOutput}") + + # Parsing parameters + set(BISON_TARGET_PARAM_OPTIONS) + set(BISON_TARGET_PARAM_ONE_VALUE_KEYWORDS + VERBOSE + COMPILE_FLAGS + DEFINES_FILE + ) + set(BISON_TARGET_PARAM_MULTI_VALUE_KEYWORDS) + cmake_parse_arguments( + BISON_TARGET_ARG + "${BISON_TARGET_PARAM_OPTIONS}" + "${BISON_TARGET_PARAM_ONE_VALUE_KEYWORDS}" + "${BISON_TARGET_PARAM_MULTI_VALUE_KEYWORDS}" + ${ARGN} + ) + + if(NOT "${BISON_TARGET_ARG_UNPARSED_ARGUMENTS}" STREQUAL "") + message(SEND_ERROR "Usage") + else() + if(NOT "${BISON_TARGET_ARG_VERBOSE}" STREQUAL "") + BISON_TARGET_option_verbose(${Name} ${BisonOutput} "${BISON_TARGET_ARG_VERBOSE}") + endif() + if(NOT "${BISON_TARGET_ARG_COMPILE_FLAGS}" STREQUAL "") + BISON_TARGET_option_extraopts("${BISON_TARGET_ARG_COMPILE_FLAGS}") + endif() + if(NOT "${BISON_TARGET_ARG_DEFINES_FILE}" STREQUAL "") + BISON_TARGET_option_defines("${BISON_TARGET_ARG_DEFINES_FILE}") + endif() + + if("${BISON_TARGET_output_header}" STREQUAL "") + # Header's name generated by bison (see option -d) + list(APPEND BISON_TARGET_cmdopt "-d") + string(REGEX REPLACE "^(.*)(\\.[^.]*)$" "\\2" _fileext "${BisonOutput}") + string(REPLACE "c" "h" _fileext ${_fileext}) + string(REGEX REPLACE "^(.*)(\\.[^.]*)$" "\\1${_fileext}" + BISON_TARGET_output_header "${BisonOutput}") + endif() + list(APPEND BISON_TARGET_outputs "${BISON_TARGET_output_header}") + + add_custom_command(OUTPUT ${BISON_TARGET_outputs} + ${BISON_TARGET_extraoutputs} + COMMAND ${BISON_EXECUTABLE} + ARGS ${BISON_TARGET_cmdopt} -o ${BisonOutput} ${BisonInput} + DEPENDS ${BisonInput} + COMMENT "[BISON][${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 ${BisonInput}) + set(BISON_${Name}_OUTPUTS ${BISON_TARGET_outputs}) + set(BISON_${Name}_COMPILE_FLAGS ${BISON_TARGET_cmdopt}) + set(BISON_${Name}_OUTPUT_SOURCE "${BisonOutput}") + set(BISON_${Name}_OUTPUT_HEADER "${BISON_TARGET_output_header}") + + endif() + endmacro() + # + #============================================================ + +endif() + +include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake) +FIND_PACKAGE_HANDLE_STANDARD_ARGS(BISON REQUIRED_VARS BISON_EXECUTABLE + VERSION_VAR BISON_VERSION) + +# FindBISON.cmake ends here |