324 lines
14 KiB
CMake
324 lines
14 KiB
CMake
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#=============================================================================
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# Copyright 2007-2009 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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# Function to compile a source file to identify the compiler. This is
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# used internally by CMake and should not be included by user code.
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# If successful, sets CMAKE_<lang>_COMPILER_ID and CMAKE_<lang>_PLATFORM_ID
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function(CMAKE_DETERMINE_COMPILER_ID lang flagvar src)
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# Make sure the compiler arguments are clean.
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string(STRIP "${CMAKE_${lang}_COMPILER_ARG1}" CMAKE_${lang}_COMPILER_ID_ARG1)
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string(REGEX REPLACE " +" ";" CMAKE_${lang}_COMPILER_ID_ARG1 "${CMAKE_${lang}_COMPILER_ID_ARG1}")
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# Make sure user-specified compiler flags are used.
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if(CMAKE_${lang}_FLAGS)
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set(CMAKE_${lang}_COMPILER_ID_FLAGS ${CMAKE_${lang}_FLAGS})
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else(CMAKE_${lang}_FLAGS)
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set(CMAKE_${lang}_COMPILER_ID_FLAGS $ENV{${flagvar}})
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endif(CMAKE_${lang}_FLAGS)
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string(REGEX REPLACE " " ";" CMAKE_${lang}_COMPILER_ID_FLAGS_LIST "${CMAKE_${lang}_COMPILER_ID_FLAGS}")
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# Compute the directory in which to run the test.
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set(CMAKE_${lang}_COMPILER_ID_DIR ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CompilerId${lang})
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# Try building with no extra flags and then try each set
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# of helper flags. Stop when the compiler is identified.
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foreach(flags "" ${CMAKE_${lang}_COMPILER_ID_TEST_FLAGS})
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if(NOT CMAKE_${lang}_COMPILER_ID)
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CMAKE_DETERMINE_COMPILER_ID_BUILD("${lang}" "${flags}" "${src}")
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foreach(file ${COMPILER_${lang}_PRODUCED_FILES})
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CMAKE_DETERMINE_COMPILER_ID_CHECK("${lang}" "${CMAKE_${lang}_COMPILER_ID_DIR}/${file}" "${src}")
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endforeach(file)
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endif(NOT CMAKE_${lang}_COMPILER_ID)
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endforeach(flags)
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# If the compiler is still unknown, try to query its vendor.
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if(NOT CMAKE_${lang}_COMPILER_ID)
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CMAKE_DETERMINE_COMPILER_ID_VENDOR(${lang})
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endif()
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# if the format is unknown after all files have been checked, put "Unknown" in the cache
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if(NOT CMAKE_EXECUTABLE_FORMAT)
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set(CMAKE_EXECUTABLE_FORMAT "Unknown" CACHE INTERNAL "Executable file format")
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endif(NOT CMAKE_EXECUTABLE_FORMAT)
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# Display the final identification result.
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if(CMAKE_${lang}_COMPILER_ID)
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if(CMAKE_${lang}_COMPILER_VERSION)
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set(_version " ${CMAKE_${lang}_COMPILER_VERSION}")
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else()
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set(_version "")
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endif()
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message(STATUS "The ${lang} compiler identification is "
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"${CMAKE_${lang}_COMPILER_ID}${_version}")
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else(CMAKE_${lang}_COMPILER_ID)
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message(STATUS "The ${lang} compiler identification is unknown")
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endif(CMAKE_${lang}_COMPILER_ID)
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set(CMAKE_${lang}_COMPILER_ID "${CMAKE_${lang}_COMPILER_ID}" PARENT_SCOPE)
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set(CMAKE_${lang}_PLATFORM_ID "${CMAKE_${lang}_PLATFORM_ID}" PARENT_SCOPE)
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set(MSVC_${lang}_ARCHITECTURE_ID "${MSVC_${lang}_ARCHITECTURE_ID}"
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PARENT_SCOPE)
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set(CMAKE_${lang}_COMPILER_VERSION "${CMAKE_${lang}_COMPILER_VERSION}" PARENT_SCOPE)
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endfunction(CMAKE_DETERMINE_COMPILER_ID)
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#-----------------------------------------------------------------------------
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# Function to write the compiler id source file.
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function(CMAKE_DETERMINE_COMPILER_ID_WRITE lang src)
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file(READ ${CMAKE_ROOT}/Modules/${src}.in ID_CONTENT_IN)
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string(CONFIGURE "${ID_CONTENT_IN}" ID_CONTENT_OUT @ONLY)
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file(WRITE ${CMAKE_${lang}_COMPILER_ID_DIR}/${src} "${ID_CONTENT_OUT}")
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endfunction(CMAKE_DETERMINE_COMPILER_ID_WRITE)
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#-----------------------------------------------------------------------------
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# Function to build the compiler id source file and look for output
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# files.
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function(CMAKE_DETERMINE_COMPILER_ID_BUILD lang testflags src)
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# Create a clean working directory.
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file(REMOVE_RECURSE ${CMAKE_${lang}_COMPILER_ID_DIR})
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file(MAKE_DIRECTORY ${CMAKE_${lang}_COMPILER_ID_DIR})
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CMAKE_DETERMINE_COMPILER_ID_WRITE("${lang}" "${src}")
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# Construct a description of this test case.
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set(COMPILER_DESCRIPTION
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"Compiler: ${CMAKE_${lang}_COMPILER} ${CMAKE_${lang}_COMPILER_ID_ARG1}
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Build flags: ${CMAKE_${lang}_COMPILER_ID_FLAGS_LIST}
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Id flags: ${testflags}
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")
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# Compile the compiler identification source.
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if(COMMAND EXECUTE_PROCESS)
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execute_process(
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COMMAND ${CMAKE_${lang}_COMPILER}
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${CMAKE_${lang}_COMPILER_ID_ARG1}
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${CMAKE_${lang}_COMPILER_ID_FLAGS_LIST}
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${testflags}
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"${src}"
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WORKING_DIRECTORY ${CMAKE_${lang}_COMPILER_ID_DIR}
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OUTPUT_VARIABLE CMAKE_${lang}_COMPILER_ID_OUTPUT
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ERROR_VARIABLE CMAKE_${lang}_COMPILER_ID_OUTPUT
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RESULT_VARIABLE CMAKE_${lang}_COMPILER_ID_RESULT
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)
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else(COMMAND EXECUTE_PROCESS)
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exec_program(
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${CMAKE_${lang}_COMPILER} ${CMAKE_${lang}_COMPILER_ID_DIR}
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ARGS ${CMAKE_${lang}_COMPILER_ID_ARG1}
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${CMAKE_${lang}_COMPILER_ID_FLAGS_LIST}
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${testflags}
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\"${src}\"
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OUTPUT_VARIABLE CMAKE_${lang}_COMPILER_ID_OUTPUT
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RETURN_VALUE CMAKE_${lang}_COMPILER_ID_RESULT
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)
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endif(COMMAND EXECUTE_PROCESS)
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# Check the result of compilation.
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if(CMAKE_${lang}_COMPILER_ID_RESULT)
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# Compilation failed.
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set(MSG
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"Compiling the ${lang} compiler identification source file \"${src}\" failed.
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${COMPILER_DESCRIPTION}
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The output was:
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${CMAKE_${lang}_COMPILER_ID_RESULT}
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${CMAKE_${lang}_COMPILER_ID_OUTPUT}
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")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log "${MSG}")
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#if(NOT CMAKE_${lang}_COMPILER_ID_ALLOW_FAIL)
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# message(FATAL_ERROR "${MSG}")
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#endif(NOT CMAKE_${lang}_COMPILER_ID_ALLOW_FAIL)
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# No output files should be inspected.
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set(COMPILER_${lang}_PRODUCED_FILES)
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else(CMAKE_${lang}_COMPILER_ID_RESULT)
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# Compilation succeeded.
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Compiling the ${lang} compiler identification source file \"${src}\" succeeded.
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${COMPILER_DESCRIPTION}
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The output was:
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${CMAKE_${lang}_COMPILER_ID_RESULT}
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${CMAKE_${lang}_COMPILER_ID_OUTPUT}
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")
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# Find the executable produced by the compiler, try all files in the
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# binary dir.
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file(GLOB COMPILER_${lang}_PRODUCED_FILES
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RELATIVE ${CMAKE_${lang}_COMPILER_ID_DIR}
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${CMAKE_${lang}_COMPILER_ID_DIR}/*)
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list(REMOVE_ITEM COMPILER_${lang}_PRODUCED_FILES "${src}")
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foreach(file ${COMPILER_${lang}_PRODUCED_FILES})
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Compilation of the ${lang} compiler identification source \""
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"${src}\" produced \"${file}\"\n\n")
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endforeach(file)
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if(NOT COMPILER_${lang}_PRODUCED_FILES)
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# No executable was found.
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Compilation of the ${lang} compiler identification source \""
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"${src}\" did not produce an executable in \""
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"${CMAKE_${lang}_COMPILER_ID_DIR}\".\n\n")
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endif(NOT COMPILER_${lang}_PRODUCED_FILES)
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endif(CMAKE_${lang}_COMPILER_ID_RESULT)
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# Return the files produced by the compilation.
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set(COMPILER_${lang}_PRODUCED_FILES "${COMPILER_${lang}_PRODUCED_FILES}" PARENT_SCOPE)
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endfunction(CMAKE_DETERMINE_COMPILER_ID_BUILD lang testflags src)
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#-----------------------------------------------------------------------------
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# Function to extract the compiler id from an executable.
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function(CMAKE_DETERMINE_COMPILER_ID_CHECK lang file)
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# Look for a compiler id if not yet known.
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if(NOT CMAKE_${lang}_COMPILER_ID)
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# Read the compiler identification string from the executable file.
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set(COMPILER_ID)
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set(COMPILER_VERSION)
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set(PLATFORM_ID)
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file(STRINGS ${file}
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CMAKE_${lang}_COMPILER_ID_STRINGS LIMIT_COUNT 4 REGEX "INFO:")
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set(HAVE_COMPILER_TWICE 0)
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foreach(info ${CMAKE_${lang}_COMPILER_ID_STRINGS})
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if("${info}" MATCHES ".*INFO:compiler\\[([^]\"]*)\\].*")
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if(COMPILER_ID)
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set(COMPILER_ID_TWICE 1)
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endif(COMPILER_ID)
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string(REGEX REPLACE ".*INFO:compiler\\[([^]]*)\\].*" "\\1"
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COMPILER_ID "${info}")
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endif("${info}" MATCHES ".*INFO:compiler\\[([^]\"]*)\\].*")
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if("${info}" MATCHES ".*INFO:platform\\[([^]\"]*)\\].*")
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string(REGEX REPLACE ".*INFO:platform\\[([^]]*)\\].*" "\\1"
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PLATFORM_ID "${info}")
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endif("${info}" MATCHES ".*INFO:platform\\[([^]\"]*)\\].*")
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if("${info}" MATCHES ".*INFO:arch\\[([^]\"]*)\\].*")
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string(REGEX REPLACE ".*INFO:arch\\[([^]]*)\\].*" "\\1"
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ARCHITECTURE_ID "${info}")
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endif("${info}" MATCHES ".*INFO:arch\\[([^]\"]*)\\].*")
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if("${info}" MATCHES ".*INFO:compiler_version\\[([^]\"]*)\\].*")
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string(REGEX REPLACE ".*INFO:compiler_version\\[([^]]*)\\].*" "\\1" COMPILER_VERSION "${info}")
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string(REGEX REPLACE "^0+([0-9])" "\\1" COMPILER_VERSION "${COMPILER_VERSION}")
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string(REGEX REPLACE "\\.0+([0-9])" ".\\1" COMPILER_VERSION "${COMPILER_VERSION}")
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endif("${info}" MATCHES ".*INFO:compiler_version\\[([^]\"]*)\\].*")
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endforeach(info)
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# Check if a valid compiler and platform were found.
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if(COMPILER_ID AND NOT COMPILER_ID_TWICE)
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set(CMAKE_${lang}_COMPILER_ID "${COMPILER_ID}")
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set(CMAKE_${lang}_PLATFORM_ID "${PLATFORM_ID}")
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set(MSVC_${lang}_ARCHITECTURE_ID "${ARCHITECTURE_ID}")
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set(CMAKE_${lang}_COMPILER_VERSION "${COMPILER_VERSION}")
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endif(COMPILER_ID AND NOT COMPILER_ID_TWICE)
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# Check the compiler identification string.
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if(CMAKE_${lang}_COMPILER_ID)
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# The compiler identification was found.
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"The ${lang} compiler identification is ${CMAKE_${lang}_COMPILER_ID}, found in \""
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"${file}\"\n\n")
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else(CMAKE_${lang}_COMPILER_ID)
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# The compiler identification could not be found.
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"The ${lang} compiler identification could not be found in \""
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"${file}\"\n\n")
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endif(CMAKE_${lang}_COMPILER_ID)
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endif(NOT CMAKE_${lang}_COMPILER_ID)
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# try to figure out the executable format: ELF, COFF, Mach-O
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if(NOT CMAKE_EXECUTABLE_FORMAT)
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file(READ ${file} CMAKE_EXECUTABLE_MAGIC LIMIT 4 HEX)
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# ELF files start with 0x7f"ELF"
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if("${CMAKE_EXECUTABLE_MAGIC}" STREQUAL "7f454c46")
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set(CMAKE_EXECUTABLE_FORMAT "ELF" CACHE INTERNAL "Executable file format")
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endif("${CMAKE_EXECUTABLE_MAGIC}" STREQUAL "7f454c46")
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# # COFF (.exe) files start with "MZ"
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# if("${CMAKE_EXECUTABLE_MAGIC}" MATCHES "4d5a....")
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# set(CMAKE_EXECUTABLE_FORMAT "COFF" CACHE STRING "Executable file format")
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# endif("${CMAKE_EXECUTABLE_MAGIC}" MATCHES "4d5a....")
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#
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# # Mach-O files start with CAFEBABE or FEEDFACE, according to http://radio.weblogs.com/0100490/2003/01/28.html
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# if("${CMAKE_EXECUTABLE_MAGIC}" MATCHES "cafebabe")
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# set(CMAKE_EXECUTABLE_FORMAT "MACHO" CACHE STRING "Executable file format")
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# endif("${CMAKE_EXECUTABLE_MAGIC}" MATCHES "cafebabe")
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# if("${CMAKE_EXECUTABLE_MAGIC}" MATCHES "feedface")
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# set(CMAKE_EXECUTABLE_FORMAT "MACHO" CACHE STRING "Executable file format")
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# endif("${CMAKE_EXECUTABLE_MAGIC}" MATCHES "feedface")
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endif(NOT CMAKE_EXECUTABLE_FORMAT)
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if(NOT DEFINED CMAKE_EXECUTABLE_FORMAT)
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set(CMAKE_EXECUTABLE_FORMAT)
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endif()
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# Return the information extracted.
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set(CMAKE_${lang}_COMPILER_ID "${CMAKE_${lang}_COMPILER_ID}" PARENT_SCOPE)
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set(CMAKE_${lang}_PLATFORM_ID "${CMAKE_${lang}_PLATFORM_ID}" PARENT_SCOPE)
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set(MSVC_${lang}_ARCHITECTURE_ID "${MSVC_${lang}_ARCHITECTURE_ID}"
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PARENT_SCOPE)
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set(CMAKE_${lang}_COMPILER_VERSION "${CMAKE_${lang}_COMPILER_VERSION}" PARENT_SCOPE)
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set(CMAKE_EXECUTABLE_FORMAT "${CMAKE_EXECUTABLE_FORMAT}" PARENT_SCOPE)
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endfunction(CMAKE_DETERMINE_COMPILER_ID_CHECK lang)
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#-----------------------------------------------------------------------------
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# Function to query the compiler vendor.
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# This uses a table with entries of the form
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# list(APPEND CMAKE_${lang}_COMPILER_ID_VENDORS ${vendor})
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# set(CMAKE_${lang}_COMPILER_ID_VENDOR_FLAGS_${vendor} -some-vendor-flag)
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# set(CMAKE_${lang}_COMPILER_ID_VENDOR_REGEX_${vendor} "Some Vendor Output")
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# We try running the compiler with the flag for each vendor and
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# matching its regular expression in the output.
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function(CMAKE_DETERMINE_COMPILER_ID_VENDOR lang)
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if(NOT CMAKE_${lang}_COMPILER_ID_DIR)
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# We get here when this function is called not from within CMAKE_DETERMINE_COMPILER_ID()
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# This is done e.g. for detecting the compiler ID for assemblers.
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# Compute the directory in which to run the test and Create a clean working directory.
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set(CMAKE_${lang}_COMPILER_ID_DIR ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CompilerId${lang})
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file(REMOVE_RECURSE ${CMAKE_${lang}_COMPILER_ID_DIR})
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file(MAKE_DIRECTORY ${CMAKE_${lang}_COMPILER_ID_DIR})
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endif(NOT CMAKE_${lang}_COMPILER_ID_DIR)
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foreach(vendor ${CMAKE_${lang}_COMPILER_ID_VENDORS})
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set(flags ${CMAKE_${lang}_COMPILER_ID_VENDOR_FLAGS_${vendor}})
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set(regex ${CMAKE_${lang}_COMPILER_ID_VENDOR_REGEX_${vendor}})
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execute_process(
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COMMAND ${CMAKE_${lang}_COMPILER}
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${CMAKE_${lang}_COMPILER_ID_ARG1}
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${CMAKE_${lang}_COMPILER_ID_FLAGS_LIST}
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${flags}
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WORKING_DIRECTORY ${CMAKE_${lang}_COMPILER_ID_DIR}
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OUTPUT_VARIABLE output ERROR_VARIABLE output
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RESULT_VARIABLE result
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TIMEOUT 10
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)
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if("${output}" MATCHES "${regex}")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Checking whether the ${lang} compiler is ${vendor} using \"${flags}\" "
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"matched \"${regex}\":\n${output}")
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set(CMAKE_${lang}_COMPILER_ID "${vendor}" PARENT_SCOPE)
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break()
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else()
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if("${result}" MATCHES "timeout")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Checking whether the ${lang} compiler is ${vendor} using \"${flags}\" "
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"terminated after 10 s due to timeout.")
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else()
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Checking whether the ${lang} compiler is ${vendor} using \"${flags}\" "
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"did not match \"${regex}\":\n${output}")
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endif()
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endif()
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endforeach()
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endfunction(CMAKE_DETERMINE_COMPILER_ID_VENDOR)
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