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CMake/Modules/Compiler/GNU-CXX.cmake

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Split GNU compiler information files This moves GNU compiler flags into new-style modules Compiler/GNU-<lang>.cmake Platform/<os>-GNU-<lang>.cmake We use language-independent helper modules Compiler/GNU.cmake Platform/<os>-GNU.cmake to define macros consolidating the information.
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include(Compiler/GNU)
__compiler_gnu(CXX)
Add a COMPILE_OPTION for a VISIBILITY_INLINES_HIDDEN target property. This corresponds to the g++ and clang++ option -fvisibility-inlines-hidden on linux. On Windows with MinGW, this corresponds to -fno-keep-inline-dllexport. That option is not supported by clang currently.
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if (WIN32)
if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.6)
set(CMAKE_CXX_COMPILE_OPTIONS_VISIBILITY_INLINES_HIDDEN "-fno-keep-inline-dllexport")
endif()
else()
if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.2)
set(CMAKE_CXX_COMPILE_OPTIONS_VISIBILITY_INLINES_HIDDEN "-fvisibility-inlines-hidden")
endif()
endif()
Add some COMPILE_OPTIONS for specifying C++ dialect. These are compiler-specific, compiler version specific, extension specific and standard version specific.
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Features: Record for GNU 4.4.
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if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.4)
Features: Record C++11 dialect switch only for GNU 4.7 and later. Previous versions of GNU are not currently supported by this CMake feature.
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# Supported since 4.3
Add some COMPILE_OPTIONS for specifying C++ dialect. These are compiler-specific, compiler version specific, extension specific and standard version specific.
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set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "-std=c++98")
set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "-std=gnu++98")
endif()
if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.7)
set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "-std=c++11")
set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "-std=gnu++11")
Features: Record for GNU 4.4.
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elseif (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.4)
Features: Record C++11 dialect switch only for GNU 4.7 and later. Previous versions of GNU are not currently supported by this CMake feature.
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# 4.3 supports 0x variants
Features: Record C/CXX dialect flags for GNU 4.6. This release was prior to standardization of C11/CXX11.
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set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "-std=c++0x")
set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "-std=gnu++0x")
Add some COMPILE_OPTIONS for specifying C++ dialect. These are compiler-specific, compiler version specific, extension specific and standard version specific.
2013-10-13 03:26:16 +04:00
endif()
Features: Add cxx_auto_type. Record the availability of this feature for GNU 4.8 on (UNIX AND NOT APPLE) only. In the future, availability can be recorded for earlier GNU, for other platforms and for other compilers. Initially the affected configurations are as restricted as possible to allow for easy testing while extending the features vector in only one dimension. The error message when using the set_property API directly is not very good, but follow up commits will provide origin debugging of the property and a target_compile_features command which will provide a configure-time backtrace when possible.
2014-04-02 17:34:16 +04:00
Features: Run GNU feature tests with std=c++14 when available.
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if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.9)
set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "-std=c++14")
set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std=gnu++14")
elseif (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.8)
Features: Add support for C++14 features. Record the features implemented by GNU 4.9 and Clang 3.4.
2014-05-06 02:21:14 +04:00
set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "-std=c++1y")
set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std=gnu++1y")
endif()
Features: Populate CMAKE_<LANG>_STANDARD_DEFAULT only for supported compilers. If no compiler feature information is known for a given compiler version, do not set a language standard default either. The two settings must be recorded consistently.
2015-02-05 00:04:18 +03:00
if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.4)
set(CMAKE_CXX_STANDARD_DEFAULT 98)
endif()
Features: Decay language flag if requested is not available. Use the highest standard compile flags available if requested language version is too new. This supports use-cases like set(CMAKE_CXX_STANDARD 14) # Compiled with -std=c++11 with GNU 4.7, which has no -std=c++14 # or equivalent flag add_executable(main main.cpp) This can be used in combination with preprocessor defines which communicate the availability of certain language features for optional use.
2014-03-28 19:09:35 +04:00
Features: Add cxx_auto_type. Record the availability of this feature for GNU 4.8 on (UNIX AND NOT APPLE) only. In the future, availability can be recorded for earlier GNU, for other platforms and for other compilers. Initially the affected configurations are as restricted as possible to allow for easy testing while extending the features vector in only one dimension. The error message when using the set_property API directly is not very good, but follow up commits will provide origin debugging of the property and a target_compile_features command which will provide a configure-time backtrace when possible.
2014-04-02 17:34:16 +04:00
macro(cmake_record_cxx_compile_features)
macro(_get_gcc_features std_version list)
Features: Use the correct dialect flag when recording features. Avoid using -std=c++1y for compilers which support -std=c++14, for example.
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record_compiler_features(CXX "${std_version}" ${list})
Features: Add cxx_auto_type. Record the availability of this feature for GNU 4.8 on (UNIX AND NOT APPLE) only. In the future, availability can be recorded for earlier GNU, for other platforms and for other compilers. Initially the affected configurations are as restricted as possible to allow for easy testing while extending the features vector in only one dimension. The error message when using the set_property API directly is not very good, but follow up commits will provide origin debugging of the property and a target_compile_features command which will provide a configure-time backtrace when possible.
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endmacro()
Features: Add support for C++14 features. Record the features implemented by GNU 4.9 and Clang 3.4.
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set(_result 0)
Record compile features for GNU on Apple. Tested with GNU 4.8 binary (bottle) from homebrew, and assumed to work with the others.
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if (UNIX AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.8)
Features: Use the correct dialect flag when recording features. Avoid using -std=c++1y for compilers which support -std=c++14, for example.
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_get_gcc_features(${CMAKE_CXX14_STANDARD_COMPILE_OPTION} CMAKE_CXX14_COMPILE_FEATURES)
Features: Add support for C++14 features. Record the features implemented by GNU 4.9 and Clang 3.4.
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endif()
Features: Record for GNU 4.4.
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if (UNIX AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.4)
Features: Add support for C++14 features. Record the features implemented by GNU 4.9 and Clang 3.4.
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if (_result EQUAL 0)
Features: Use the correct dialect flag when recording features. Avoid using -std=c++1y for compilers which support -std=c++14, for example.
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_get_gcc_features(${CMAKE_CXX11_STANDARD_COMPILE_OPTION} CMAKE_CXX11_COMPILE_FEATURES)
Features: Add support for C++14 features. Record the features implemented by GNU 4.9 and Clang 3.4.
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endif()
Project: Fix exit-on-error with compile feature tests.
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if (_result EQUAL 0)
Features: Use the correct dialect flag when recording features. Avoid using -std=c++1y for compilers which support -std=c++14, for example.
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_get_gcc_features(${CMAKE_CXX98_STANDARD_COMPILE_OPTION} CMAKE_CXX98_COMPILE_FEATURES)
Project: Fix exit-on-error with compile feature tests.
2014-05-06 23:31:30 +04:00
endif()
Features: Add cxx_auto_type. Record the availability of this feature for GNU 4.8 on (UNIX AND NOT APPLE) only. In the future, availability can be recorded for earlier GNU, for other platforms and for other compilers. Initially the affected configurations are as restricted as possible to allow for easy testing while extending the features vector in only one dimension. The error message when using the set_property API directly is not very good, but follow up commits will provide origin debugging of the property and a target_compile_features command which will provide a configure-time backtrace when possible.
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endif()
endmacro()