diff options
Diffstat (limited to 'Modules/Compiler/Clang-C.cmake')
| -rw-r--r-- | Modules/Compiler/Clang-C.cmake | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/Modules/Compiler/Clang-C.cmake b/Modules/Compiler/Clang-C.cmake index 98fcd0b3ff..05d3c0b02e 100644 --- a/Modules/Compiler/Clang-C.cmake +++ b/Modules/Compiler/Clang-C.cmake @@ -1,2 +1,38 @@ include(Compiler/Clang) __compiler_clang(C) + +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() |