d0af0faefb
The __STDC_VERSION__ macro may be defined or not depending on the implementation dialect of C. Test that it is defined before testing its value. The CXX tests do not need such a change because they define __cplusplus in all dialects.
13 lines
598 B
CMake
13 lines
598 B
CMake
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set(_cmake_oldestSupported "(__GNUC__ * 100 + __GNUC_MINOR__) >= 407")
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set(GNU46_C11 "${_cmake_oldestSupported} && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L")
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set(_cmake_feature_test_c_static_assert "${GNU46_C11}")
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# Since 4.4 at least:
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set(GNU44_C99 "${_cmake_oldestSupported} && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L")
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set(_cmake_feature_test_c_restrict "${GNU44_C99}")
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set(_cmake_feature_test_c_variadic_macros "${GNU44_C99}")
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set(GNU_C90 "${_cmake_oldestSupported} && !defined(__STDC_VERSION__)")
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set(_cmake_feature_test_c_function_prototypes "${GNU_C90}")
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