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| author | Stephen Kelly <steveire@gmail.com> | 2013-11-04 00:15:43 (GMT) |
|---|---|---|
| committer | Stephen Kelly <steveire@gmail.com> | 2014-05-14 22:15:18 (GMT) |
| commit | e0890d03a48d12904ffe24aa94fb2847d8d5f4e7 (patch) | |
| tree | 820631dcc5cd8c95111dbfa7d33e1a59d554f8a4 /Modules/Compiler | |
| parent | 775458dede98d28fe81ac878541a6ead735443fc (diff) | |
| download | CMake-e0890d03a48d12904ffe24aa94fb2847d8d5f4e7.zip CMake-e0890d03a48d12904ffe24aa94fb2847d8d5f4e7.tar.gz CMake-e0890d03a48d12904ffe24aa94fb2847d8d5f4e7.tar.bz2 | |
Features: Extend concept to C language.
Add properties and variables corresponding to CXX equivalents.
Add features for c_function_prototypes (C90), c_restrict (C99),
c_variadic_macros (C99) and c_static_assert (C11). This feature
set can be extended later.
Add a <PREFIX>_RESTRICT symbol define to WriteCompilerDetectionHeader
to conditionally represent the c_restrict feature.
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() |