2cae5128fd
Due to #4662 -isystem support was disabled for all GNU Compilers on Apple platforms. But the change was probably a just work around for a broken compiler on Tiger (see 10837#c27206). So we tighten the condition to only kick in for GCC versions earlier than 4. That should ensure sane behavior for Xcode 3.2 and later.
59 lines
2.6 KiB
CMake
59 lines
2.6 KiB
CMake
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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_${lang}_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -E <SOURCE> > <PREPROCESSED_SOURCE>")
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set(CMAKE_${lang}_CREATE_ASSEMBLY_SOURCE "<CMAKE_${lang}_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -S <SOURCE> -o <ASSEMBLY_SOURCE>")
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if(NOT APPLE OR NOT CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 4) # work around #4462
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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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