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CMake/Modules/Compiler/AppleClang-C.cmake

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Features: Don't record for AppleClang Features are currently recorded accidentally for all versions of AppleClang > 3.4 (I have no idea how that relates to upstream Clang). Presumably that version has the features which are accidentally recorded, but in the future features will be recorded initially for only AppleClang >= 5.1, which would appear as a feature regression. Commit v3.1.0-rc1~635^2~11 (Don't load Clang-CXX from AppleClang-CXX., 2013-11-11) ajusted the logic for the CXX language. Make a similar change for the C language.
2014-11-13 01:20:36 +03:00
include(Compiler/Clang)
__compiler_clang(C)
Features: Record for AppleClang 5.1 Apple's Clang 5.1 already supports most of the C and C++ features CMake enumerates.
2014-11-13 00:48:17 +03:00
if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 5.1)
set(CMAKE_C90_STANDARD_COMPILE_OPTION "-std=c90")
set(CMAKE_C90_EXTENSION_COMPILE_OPTION "-std=gnu90")
set(CMAKE_C99_STANDARD_COMPILE_OPTION "-std=c99")
set(CMAKE_C99_EXTENSION_COMPILE_OPTION "-std=gnu99")
set(CMAKE_C11_STANDARD_COMPILE_OPTION "-std=c11")
set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std=gnu11")
endif()
set(CMAKE_C_STANDARD_DEFAULT 99)
macro(cmake_record_c_compile_features)
macro(_get_appleclang_features std_version list)
record_compiler_features(C "${std_version}" ${list})
endmacro()
if (UNIX AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 5.1)
_get_appleclang_features(${CMAKE_C11_STANDARD_COMPILE_OPTION} CMAKE_C11_COMPILE_FEATURES)
if (_result EQUAL 0)
_get_appleclang_features(${CMAKE_C99_STANDARD_COMPILE_OPTION} CMAKE_C99_COMPILE_FEATURES)
endif()
if (_result EQUAL 0)
_get_appleclang_features(${CMAKE_C90_STANDARD_COMPILE_OPTION} CMAKE_C90_COMPILE_FEATURES)
endif()
else()
set(_result 0)
endif()
endmacro()