diff options
Diffstat (limited to 'Modules/Compiler')
| -rw-r--r-- | Modules/Compiler/GNU-C-FeatureTests.cmake | 12 | ||||
| -rw-r--r-- | Modules/Compiler/GNU-C.cmake | 32 |
2 files changed, 44 insertions, 0 deletions
diff --git a/Modules/Compiler/GNU-C-FeatureTests.cmake b/Modules/Compiler/GNU-C-FeatureTests.cmake new file mode 100644 index 0000000..dc1695c --- /dev/null +++ b/Modules/Compiler/GNU-C-FeatureTests.cmake @@ -0,0 +1,12 @@ + +set(_cmake_oldestSupported "(__GNUC__ * 100 + __GNUC_MINOR__) >= 407") + +set(GNU46_C11 "${_cmake_oldestSupported} && __STDC_VERSION__ >= 201112L") +set(_cmake_feature_test_c_static_assert "${GNU46_C11}") +# Since 4.4 at least: +set(GNU44_C99 "${_cmake_oldestSupported} && __STDC_VERSION__ >= 199901L") +set(_cmake_feature_test_c_restrict "${GNU44_C99}") +set(_cmake_feature_test_c_variadic_macros "${GNU44_C99}") + +set(GNU_C90 "${_cmake_oldestSupported} && !defined(__STDC_VERSION__)") +set(_cmake_feature_test_c_function_prototypes "${GNU_C90}") diff --git a/Modules/Compiler/GNU-C.cmake b/Modules/Compiler/GNU-C.cmake index 9a5137a..35954be 100644 --- a/Modules/Compiler/GNU-C.cmake +++ b/Modules/Compiler/GNU-C.cmake @@ -1,2 +1,34 @@ include(Compiler/GNU) __compiler_gnu(C) + +if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7) + set(CMAKE_C90_STANDARD_COMPILE_OPTION "-std=c90") + set(CMAKE_C90_EXTENSION_COMPILE_OPTION "-std=gnu90") + + set(CMAKE_C99_STANDARD_COMPILE_OPTION "-std=c99") + set(CMAKE_C99_EXTENSION_COMPILE_OPTION "-std=gnu99") + + set(CMAKE_C11_STANDARD_COMPILE_OPTION "-std=c11") + set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std=gnu11") +endif() + +# This may change in a future GNU version. +set(CMAKE_C_STANDARD_DEFAULT 90) + +macro(cmake_record_c_compile_features) + macro(_get_gcc_features std_version list) + record_compiler_features(C "-std=${std_version}" ${list}) + endmacro() + + if (UNIX AND NOT APPLE AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7) + _get_gcc_features(c90 CMAKE_C90_COMPILE_FEATURES) + if (_result EQUAL 0) + _get_gcc_features(c99 CMAKE_C99_COMPILE_FEATURES) + endif() + if (_result EQUAL 0) + _get_gcc_features(c11 CMAKE_C11_COMPILE_FEATURES) + endif() + else() + set(_result 0) + endif() +endmacro() |