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- set(_cmake_oldestSupported "(__GNUC__ * 100 + __GNUC_MINOR__) >= 304")
- # GNU 4.7 correctly sets __STDC_VERSION__ to 201112L, but GNU 4.6 sets it
- # to 201000L. As the former is strictly greater than the latter, test only
- # for the latter. If in the future CMake learns about a C feature which was
- # introduced with GNU 4.7, that should test for the correct version, similar
- # to the distinction between __cplusplus and __GXX_EXPERIMENTAL_CXX0X__ tests.
- set(GNU46_C11 "(__GNUC__ * 100 + __GNUC_MINOR__) >= 406 && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201000L")
- set(_cmake_feature_test_c_static_assert "${GNU46_C11}")
- # Since 3.4 at least:
- set(GNU34_C99 "(__GNUC__ * 100 + __GNUC_MINOR__) >= 304 && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L")
- set(_cmake_feature_test_c_restrict "${GNU34_C99}")
- set(_cmake_feature_test_c_variadic_macros "${GNU34_C99}")
- set(GNU_C90 "${_cmake_oldestSupported}")
- set(_cmake_feature_test_c_function_prototypes "${GNU_C90}")
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