2011-10-24 19:36:49 +08:00
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# cmake/modules/language_support.cmake
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#
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# Temporary additional general language support is contained within this
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# file.
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# This additional function definition is needed to provide a workaround for
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# CMake bug 9220.
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# On debian testing (cmake 2.6.2), I get return code zero when calling
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# cmake the first time, but cmake crashes when running a second time
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# as follows:
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#
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# -- The Fortran compiler identification is unknown
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# CMake Error at /usr/share/cmake-2.6/Modules/CMakeFortranInformation.cmake:7 (GET_FILENAME_COMPONENT):
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# get_filename_component called with incorrect number of arguments
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# Call Stack (most recent call first):
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# CMakeLists.txt:3 (enable_language)
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#
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# My workaround is to invoke cmake twice. If both return codes are zero,
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# it is safe to invoke ENABLE_LANGUAGE(Fortran OPTIONAL)
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function(workaround_9220 language language_works)
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#message("DEBUG: language = ${language}")
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set(text
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"project(test NONE)
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2014-02-13 16:21:13 +08:00
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cmake_minimum_required(VERSION 2.8.0)
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2013-03-17 21:17:44 +08:00
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set (CMAKE_Fortran_FLAGS \"${CMAKE_Fortran_FLAGS}\")
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set (CMAKE_EXE_LINKER_FLAGS \"${CMAKE_EXE_LINKER_FLAGS}\")
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2012-06-15 15:16:10 +08:00
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enable_language(${language} OPTIONAL)
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")
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2011-10-24 19:36:49 +08:00
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file(REMOVE_RECURSE ${CMAKE_BINARY_DIR}/language_tests/${language})
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file(MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/language_tests/${language})
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file(WRITE ${CMAKE_BINARY_DIR}/language_tests/${language}/CMakeLists.txt
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${text})
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execute_process(
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COMMAND ${CMAKE_COMMAND} .
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WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/language_tests/${language}
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RESULT_VARIABLE return_code
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OUTPUT_QUIET
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ERROR_QUIET
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)
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if(return_code EQUAL 0)
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# Second run
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execute_process (
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COMMAND ${CMAKE_COMMAND} .
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WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/language_tests/${language}
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RESULT_VARIABLE return_code
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OUTPUT_QUIET
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ERROR_QUIET
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)
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if(return_code EQUAL 0)
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set(${language_works} ON PARENT_SCOPE)
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else(return_code EQUAL 0)
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set(${language_works} OFF PARENT_SCOPE)
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endif(return_code EQUAL 0)
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else(return_code EQUAL 0)
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set(${language_works} OFF PARENT_SCOPE)
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endif(return_code EQUAL 0)
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endfunction(workaround_9220)
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# Temporary tests of the above function.
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#workaround_9220(CXX CXX_language_works)
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#message("CXX_language_works = ${CXX_language_works}")
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#workaround_9220(CXXp CXXp_language_works)
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#message("CXXp_language_works = ${CXXp_language_works}")
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