124 lines
4.6 KiB
CMake
124 lines
4.6 KiB
CMake
# - Find Ragel 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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# RAGEL_EXECUTABLE - path to the bison program
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# RAGEL_VERSION - version of bison
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# RAGEL_FOUND - true if the program was found
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#
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# If ragel is found, the module defines the macros:
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#
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# RAGEL_TARGET(<Name> <RagelInp> <CodeOutput>
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# [COMPILE_FLAGS <string>])
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#
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# which will create a custom rule to generate a state machine. <RagelInp> is
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# the path to a Ragel file. <CodeOutput> is the name of the source file
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# generated by ragel. If COMPILE_FLAGS option is specified, the next
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# parameter is added in the bison command line.
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#
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# The macro defines a set of variables:
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# RAGEL_${Name}_DEFINED - true is the macro ran successfully
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# RAGEL_${Name}_INPUT - The input source file, an alias for <RagelInp>
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# RAGEL_${Name}_OUTPUT_SOURCE - The source file generated by ragel
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# RAGEL_${Name}_OUTPUT_HEADER - The header file generated by ragel
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# RAGEL_${Name}_OUTPUTS - The sources files generated by ragel
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# RAGEL_${Name}_COMPILE_FLAGS - Options used in the ragel 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(RAGEL) # or e.g.: find_package(RAGEL 6.6 REQUIRED)
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# RAGEL_TARGET(MyMachine machine.rl ${CMAKE_CURRENT_BINARY_DIR}/machine.cc)
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# add_executable(Foo main.cc ${RAGEL_MyMachine_OUTPUTS})
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# ====================================================================
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# 2014-02-09, Georg Sauthoff <mail@georg.so>
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#
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# I don't think that these few lines are even copyrightable material,
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# but I am fine with using the BSD/MIT/GPL license on it ...
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#
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# I've used following references:
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# http://www.cmake.org/cmake/help/v2.8.12/cmake.html
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# /usr/share/cmake/Modules/FindFLEX.cmake
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# /usr/share/cmake/Modules/FindBISON.cmake
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cmake_minimum_required(VERSION 3.14)
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include(CheckCXXCompilerFlag)
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find_program(RAGEL_EXECUTABLE NAMES ragel DOC "path to the ragel executable")
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mark_as_advanced(RAGEL_EXECUTABLE)
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if(RAGEL_EXECUTABLE)
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execute_process(COMMAND ${RAGEL_EXECUTABLE} --version
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OUTPUT_VARIABLE RAGEL_version_output
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ERROR_VARIABLE RAGEL_version_error
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RESULT_VARIABLE RAGEL_version_result
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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if(${RAGEL_version_result} EQUAL 0)
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string(REGEX REPLACE "^Ragel State Machine Compiler version ([^ ]+) .*$"
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"\\1"
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RAGEL_VERSION "${RAGEL_version_output}")
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else()
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message(SEND_ERROR
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"Command \"${RAGEL_EXECUTABLE} --version\" failed with output:
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${RAGEL_version_error}")
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endif()
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#============================================================
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# RAGEL_TARGET (public macro)
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#============================================================
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#
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macro(RAGEL_TARGET Name Input Output)
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set(RAGEL_TARGET_usage
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"RAGEL_TARGET(<Name> <Input> <Output> [COMPILE_FLAGS <string>]")
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if(${ARGC} GREATER 3)
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if(${ARGC} EQUAL 5)
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if("${ARGV3}" STREQUAL "COMPILE_FLAGS")
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set(RAGEL_EXECUTABLE_opts "${ARGV4}")
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separate_arguments(RAGEL_EXECUTABLE_opts)
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else()
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message(SEND_ERROR ${RAGEL_TARGET_usage})
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endif()
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else()
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message(SEND_ERROR ${RAGEL_TARGET_usage})
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endif()
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endif()
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get_filename_component(Dir "${Output}" DIRECTORY)
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file(MAKE_DIRECTORY ${Dir})
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add_custom_command(OUTPUT ${Output}
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COMMAND ${RAGEL_EXECUTABLE}
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ARGS ${RAGEL_EXECUTABLE_opts} -o${Output} ${Input}
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DEPENDS ${Input}
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COMMENT
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"[RAGEL][${Name}] Compiling state machine with Ragel ${RAGEL_VERSION}"
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WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
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# Disable some warnings the user may have set which ragel will trigger.
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check_cxx_compiler_flag ("-Wno-unused-const-variable" __no_unused_const_variable)
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if (__no_unused_const_variable)
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set_source_files_properties (
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${Output}
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PROPERTIES
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COMPILE_FLAGS -Wno-unused-const-variable
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)
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endif()
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set(RAGEL_${Name}_DEFINED TRUE)
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set(RAGEL_${Name}_OUTPUTS ${Output})
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set(RAGEL_${Name}_INPUT ${Input})
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set(RAGEL_${Name}_COMPILE_FLAGS ${RAGEL_EXECUTABLE_opts})
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endmacro()
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endif()
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# use this include when module file is located under /usr/share/cmake/Modules
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#include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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# use this include when module file is located in build tree
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include(FindPackageHandleStandardArgs)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(RAGEL REQUIRED_VARS RAGEL_EXECUTABLE
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VERSION_VAR RAGEL_VERSION)
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