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- # - Find Ragel executable and provides macros to generate custom build rules
- # The module defines the following variables:
- #
- # RAGEL_EXECUTABLE - path to the ragel program
- # RAGEL_VERSION - version of ragel
- # RAGEL_FOUND - true if the program was found
- #
- # If ragel is found, the module defines the macros:
- #
- # RAGEL_TARGET(<Name> INPUTS <inputs> OUTPUT <output>
- # [COMPILE_FLAGS <string>] [DEPENDS <depends>])
- #
- # which will create a custom rule to generate a state machine. <RagelInp> is
- # the path to a Ragel file. <CodeOutput> is the name of the source file
- # generated by ragel. If COMPILE_FLAGS option is specified, the next
- # parameter is added in the ragel command line.
- #
- # The macro defines a set of variables:
- # RAGEL_${Name}_DEFINED - true is the macro ran successfully
- # RAGEL_${Name}_INPUT - The input source file, an alias for <RagelInp>
- # RAGEL_${Name}_OUTPUT_SOURCE - The source file generated by ragel
- # RAGEL_${Name}_OUTPUT_HEADER - The header file generated by ragel
- # RAGEL_${Name}_OUTPUTS - The sources files generated by ragel
- # RAGEL_${Name}_COMPILE_FLAGS - Options used in the ragel command line
- #
- # ====================================================================
- # Example:
- #
- # find_package(RAGEL) # or e.g.: find_package(RAGEL 6.6 REQUIRED)
- # RAGEL_TARGET(MyMachine machine.rl ${CMAKE_CURRENT_BINARY_DIR}/machine.cc)
- # add_executable(Foo main.cc ${RAGEL_MyMachine_OUTPUTS})
- # ====================================================================
-
- # 2014-02-09, Georg Sauthoff <mail@georg.so>
- #
- # I don't think that these few lines are even copyrightable material,
- # but I am fine with using the BSD/MIT/GPL license on it ...
- #
- # I've used following references:
- # http://www.cmake.org/cmake/help/v2.8.12/cmake.html
- # /usr/share/cmake/Modules/FindFLEX.cmake
- # /usr/share/cmake/Modules/FindBISON.cmake
-
- # uses some features which are not available in 2.6
- cmake_minimum_required(VERSION 2.8)
-
- find_program(RAGEL_EXECUTABLE NAMES ragel DOC "path to the ragel executable")
- mark_as_advanced(RAGEL_EXECUTABLE)
-
- if(RAGEL_EXECUTABLE)
-
- execute_process(COMMAND ${RAGEL_EXECUTABLE} --version
- OUTPUT_VARIABLE RAGEL_version_output
- ERROR_VARIABLE RAGEL_version_error
- RESULT_VARIABLE RAGEL_version_result
- OUTPUT_STRIP_TRAILING_WHITESPACE)
-
- if(${RAGEL_version_result} EQUAL 0)
- string(REGEX REPLACE "^Ragel State Machine Compiler version ([^ ]+) .*$"
- "\\1"
- RAGEL_VERSION "${RAGEL_version_output}")
- else()
- message(SEND_ERROR
- "Command \"${RAGEL_EXECUTABLE} --version\" failed with output:
- ${RAGEL_version_error}")
- endif()
-
- #============================================================
- # RAGEL_TARGET (public macro)
- #============================================================
- #
- macro(RAGEL_TARGET Name)
- CMAKE_PARSE_ARGUMENTS(RAGEL "" "OUTPUT"
- "INPUTS;DEPENDS;COMPILE_FLAGS" ${ARGN})
- add_custom_command(OUTPUT ${RAGEL_OUTPUT}
- COMMAND ${RAGEL_EXECUTABLE}
- ARGS ${RAGEL_COMPILE_FLAGS} -o${RAGEL_OUTPUT} ${RAGEL_INPUTS}
- DEPENDS ${RAGEL_INPUTS} ${RAGEL_DEPENDS}
- COMMENT
- "[RAGEL][${Name}] Compiling state machine with Ragel ${RAGEL_VERSION}"
- WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
-
- set(RAGEL_${Name}_DEFINED TRUE)
- set(RAGEL_${Name}_OUTPUTS ${RAGEL_OUTPUT})
- set(RAGEL_${Name}_INPUT ${RAGEL_INPUTS})
- set(RAGEL_${Name}_COMPILE_FLAGS ${RAGEL_COMPILE_FLAGS})
- endmacro()
-
- endif()
-
- # use this include when module file is located under /usr/share/cmake/Modules
- #include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
- # use this include when module file is located in build tree
- include(FindPackageHandleStandardArgs)
- FIND_PACKAGE_HANDLE_STANDARD_ARGS(RAGEL REQUIRED_VARS RAGEL_EXECUTABLE
- VERSION_VAR RAGEL_VERSION)
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