6fb3e5f176
Ancient versions of CMake required else(), endif(), and similar block termination commands to have arguments matching the command starting the block. This is no longer the preferred style.
68 lines
2.3 KiB
CMake
68 lines
2.3 KiB
CMake
# 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 = ${language}")
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set(text
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"project(test NONE)
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cmake_minimum_required(VERSION 2.8.0)
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set (CMAKE_Fortran_FLAGS \"${CMAKE_Fortran_FLAGS}\")
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set (CMAKE_EXE_LINKER_FLAGS \"${CMAKE_EXE_LINKER_FLAGS}\")
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enable_language(${language})
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")
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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 ${CMAKE_COMMAND} . -G "${CMAKE_GENERATOR}"
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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 ${CMAKE_COMMAND} . -G "${CMAKE_GENERATOR}"
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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(${language_works} ON PARENT_SCOPE)
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else()
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set(${language_works} OFF PARENT_SCOPE)
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endif()
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else()
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set(${language_works} OFF PARENT_SCOPE)
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endif()
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endfunction()
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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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