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CMake/Modules/Compiler/Clang-C.cmake

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Clang: Split Compiler/Clang* modules out from GNU (#13550) While Clang presents an almost identical interface to GNU there will be some differences. Split the compiler information modules to allow separate rules for Clang. Start by loading the GNU rules but leave a place to add Clang-specific information.
2012-09-19 22:04:13 +04:00
include(Compiler/Clang)
__compiler_clang(C)
Features: Record for Clang 3.4 Clang 3.4 supports all features currently known to CMake.
2014-05-06 13:59:12 +04:00
cmake_policy(GET CMP0025 appleClangPolicy)
if(WIN32 OR (APPLE AND NOT appleClangPolicy STREQUAL NEW))
return()
endif()
if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.4)
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 90)
macro(cmake_record_c_compile_features)
macro(_get_clang_features std_version list)
record_compiler_features(C "-std=${std_version}" ${list})
endmacro()
if (UNIX AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.4)
_get_clang_features(c11 CMAKE_C11_COMPILE_FEATURES)
if (_result EQUAL 0)
_get_clang_features(c99 CMAKE_C99_COMPILE_FEATURES)
endif()
if (_result EQUAL 0)
_get_clang_features(c90 CMAKE_C90_COMPILE_FEATURES)
endif()
else()
set(_result 0)
endif()
endmacro()