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Diffstat (limited to 'cmake/FindRagel.cmake')
| -rw-r--r-- | cmake/FindRagel.cmake | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/cmake/FindRagel.cmake b/cmake/FindRagel.cmake new file mode 100644 index 0000000..f43298e --- /dev/null +++ b/cmake/FindRagel.cmake @@ -0,0 +1,103 @@ +# - 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 + +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" ${ARGN}) + + file(RELATIVE_PATH RAGEL_OUTPUT_RELATIVE "${CMAKE_CURRENT_BINARY_DIR}" + "${RAGEL_OUTPUT}") + file(RELATIVE_PATH RAGEL_INPUTS_RELATIVE "${CMAKE_CURRENT_SOURCE_DIR}" + "${RAGEL_INPUTS}") + + 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} -> ${RAGEL_OUTPUT}" + WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}) + get_filename_component(src_target ${RAGEL_INPUTS} NAME_WE) + add_custom_target(ragel_${src_target} DEPENDS ${RAGEL_OUTPUT}) + set_source_files_properties(${RAGEL_OUTPUT} PROPERTIES GENERATED TRUE) + + 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) |