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