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#=============================================================================
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# Copyright 2002-2009 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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# This module is shared by multiple languages; use include blocker.
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if(__COMPILER_GNU)
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return()
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endif()
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set(__COMPILER_GNU 1)
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macro(__compiler_gnu lang)
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# Feature flags.
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set(CMAKE_${lang}_VERBOSE_FLAG "-v")
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set(CMAKE_${lang}_COMPILE_OPTIONS_PIC "-fPIC")
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if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.4)
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set(CMAKE_${lang}_COMPILE_OPTIONS_PIE "-fPIE")
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endif()
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if(NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 4.2)
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set(CMAKE_${lang}_COMPILE_OPTIONS_VISIBILITY "-fvisibility=")
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endif()
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set(CMAKE_SHARED_LIBRARY_${lang}_FLAGS "-fPIC")
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set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "-shared")
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set(CMAKE_${lang}_COMPILE_OPTIONS_SYSROOT "--sysroot=")
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# Older versions of gcc (< 4.5) contain a bug causing them to report a missing
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# header file as a warning if depfiles are enabled, causing check_header_file
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# tests to always succeed. Work around this by disabling dependency tracking
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# in try_compile mode.
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get_property(_IN_TC GLOBAL PROPERTY IN_TRY_COMPILE)
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if(NOT _IN_TC OR CMAKE_FORCE_DEPFILES)
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# distcc does not transform -o to -MT when invoking the preprocessor
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# internally, as it ought to. Work around this bug by setting -MT here
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# even though it isn't strictly necessary.
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set(CMAKE_DEPFILE_FLAGS_${lang} "-MMD -MT <OBJECT> -MF <DEPFILE>")
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endif()
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# Initial configuration flags.
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set(CMAKE_${lang}_FLAGS_INIT "")
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set(CMAKE_${lang}_FLAGS_DEBUG_INIT "-g")
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set(CMAKE_${lang}_FLAGS_MINSIZEREL_INIT "-Os -DNDEBUG")
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set(CMAKE_${lang}_FLAGS_RELEASE_INIT "-O3 -DNDEBUG")
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set(CMAKE_${lang}_FLAGS_RELWITHDEBINFO_INIT "-O2 -g -DNDEBUG")
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set(CMAKE_${lang}_CREATE_PREPROCESSED_SOURCE "<CMAKE_${lang}_COMPILER> <DEFINES> <FLAGS> -E <SOURCE> > <PREPROCESSED_SOURCE>")
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set(CMAKE_${lang}_CREATE_ASSEMBLY_SOURCE "<CMAKE_${lang}_COMPILER> <DEFINES> <FLAGS> -S <SOURCE> -o <ASSEMBLY_SOURCE>")
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if(NOT APPLE)
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set(CMAKE_INCLUDE_SYSTEM_FLAG_${lang} "-isystem ")
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endif()
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endmacro()
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