116 lines
4.8 KiB
CMake
116 lines
4.8 KiB
CMake
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#=============================================================================
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# Copyright 2004-2012 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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macro(_cmake_find_compiler lang)
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# Use already-enabled languages for reference.
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get_property(_languages GLOBAL PROPERTY ENABLED_LANGUAGES)
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list(REMOVE_ITEM _languages "${lang}")
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if(CMAKE_${lang}_COMPILER_INIT)
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# Search only for the specified compiler.
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set(CMAKE_${lang}_COMPILER_LIST "${CMAKE_${lang}_COMPILER_INIT}")
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else()
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# Re-order the compiler list with preferred vendors first.
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set(_${lang}_COMPILER_LIST "${CMAKE_${lang}_COMPILER_LIST}")
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set(CMAKE_${lang}_COMPILER_LIST "")
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# Prefer vendors of compilers from reference languages.
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foreach(l ${_languages})
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list(APPEND CMAKE_${lang}_COMPILER_LIST
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${_${lang}_COMPILER_NAMES_${CMAKE_${l}_COMPILER_ID}})
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endforeach()
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# Prefer vendors based on the platform.
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list(APPEND CMAKE_${lang}_COMPILER_LIST ${CMAKE_${lang}_COMPILER_NAMES})
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# Append the rest of the list and remove duplicates.
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list(APPEND CMAKE_${lang}_COMPILER_LIST ${_${lang}_COMPILER_LIST})
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unset(_${lang}_COMPILER_LIST)
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list(REMOVE_DUPLICATES CMAKE_${lang}_COMPILER_LIST)
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if(CMAKE_${lang}_COMPILER_EXCLUDE)
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list(REMOVE_ITEM CMAKE_${lang}_COMPILER_LIST
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${CMAKE_${lang}_COMPILER_EXCLUDE})
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endif()
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endif()
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# Look for directories containing compilers of reference languages.
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set(_${lang}_COMPILER_HINTS)
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foreach(l ${_languages})
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if(CMAKE_${l}_COMPILER AND IS_ABSOLUTE "${CMAKE_${l}_COMPILER}")
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get_filename_component(_hint "${CMAKE_${l}_COMPILER}" PATH)
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if(IS_DIRECTORY "${_hint}")
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list(APPEND _${lang}_COMPILER_HINTS "${_hint}")
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endif()
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unset(_hint)
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endif()
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endforeach()
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# Find the compiler.
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if(_${lang}_COMPILER_HINTS)
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# Prefer directories containing compilers of reference languages.
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list(REMOVE_DUPLICATES _${lang}_COMPILER_HINTS)
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find_program(CMAKE_${lang}_COMPILER
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NAMES ${CMAKE_${lang}_COMPILER_LIST}
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PATHS ${_${lang}_COMPILER_HINTS}
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NO_DEFAULT_PATH
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DOC "${lang} compiler")
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endif()
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find_program(CMAKE_${lang}_COMPILER NAMES ${CMAKE_${lang}_COMPILER_LIST} DOC "${lang} compiler")
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if(CMAKE_${lang}_COMPILER_INIT AND NOT CMAKE_${lang}_COMPILER)
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set(CMAKE_${lang}_COMPILER "${CMAKE_${lang}_COMPILER_INIT}" CACHE FILEPATH "${lang} compiler" FORCE)
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endif()
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unset(_${lang}_COMPILER_HINTS)
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unset(_languages)
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# Look for a make tool provided by Xcode
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if(CMAKE_${lang}_COMPILER STREQUAL "CMAKE_${lang}_COMPILER-NOTFOUND" AND CMAKE_HOST_APPLE)
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foreach(comp ${CMAKE_${lang}_COMPILER_LIST})
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execute_process(COMMAND xcrun --find ${comp}
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OUTPUT_VARIABLE _xcrun_out OUTPUT_STRIP_TRAILING_WHITESPACE
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ERROR_VARIABLE _xcrun_err)
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if(_xcrun_out)
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set_property(CACHE CMAKE_${lang}_COMPILER PROPERTY VALUE "${_xcrun_out}")
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break()
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endif()
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endforeach()
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endif()
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endmacro()
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macro(_cmake_find_compiler_path lang)
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if(CMAKE_${lang}_COMPILER)
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# we only get here if CMAKE_${lang}_COMPILER was specified using -D or a pre-made CMakeCache.txt
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# (e.g. via ctest) or set in CMAKE_TOOLCHAIN_FILE
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# if CMAKE_${lang}_COMPILER is a list of length 2, use the first item as
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# CMAKE_${lang}_COMPILER and the 2nd one as CMAKE_${lang}_COMPILER_ARG1
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list(LENGTH CMAKE_${lang}_COMPILER _CMAKE_${lang}_COMPILER_LIST_LENGTH)
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if("${_CMAKE_${lang}_COMPILER_LIST_LENGTH}" EQUAL 2)
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list(GET CMAKE_${lang}_COMPILER 1 CMAKE_${lang}_COMPILER_ARG1)
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list(GET CMAKE_${lang}_COMPILER 0 CMAKE_${lang}_COMPILER)
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endif()
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unset(_CMAKE_${lang}_COMPILER_LIST_LENGTH)
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# find the compiler in the PATH if necessary
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get_filename_component(_CMAKE_USER_${lang}_COMPILER_PATH "${CMAKE_${lang}_COMPILER}" PATH)
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if(NOT _CMAKE_USER_${lang}_COMPILER_PATH)
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find_program(CMAKE_${lang}_COMPILER_WITH_PATH NAMES ${CMAKE_${lang}_COMPILER})
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if(CMAKE_${lang}_COMPILER_WITH_PATH)
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set(CMAKE_${lang}_COMPILER ${CMAKE_${lang}_COMPILER_WITH_PATH})
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get_property(_CMAKE_${lang}_COMPILER_CACHED CACHE CMAKE_${lang}_COMPILER PROPERTY TYPE)
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if(_CMAKE_${lang}_COMPILER_CACHED)
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set(CMAKE_${lang}_COMPILER "${CMAKE_${lang}_COMPILER}" CACHE STRING "${lang} compiler" FORCE)
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endif()
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unset(_CMAKE_${lang}_COMPILER_CACHED)
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endif()
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unset(CMAKE_${lang}_COMPILER_WITH_PATH CACHE)
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endif()
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endif()
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endmacro()
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