feature_tests.c

 
const char features[] = {"\n"
                         "C_FEATURE:"
#if (__GNUC__ * 100 + __GNUC_MINOR__) >= 304
                         "1"
#else
                         "0"
#endif
                         "c_function_prototypes\n"
                         "C_FEATURE:"
#if (__GNUC__ * 100 + __GNUC_MINOR__) >= 304 && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
                         "1"
#else
                         "0"
#endif
                         "c_restrict\n"
                         "C_FEATURE:"
#if (__GNUC__ * 100 + __GNUC_MINOR__) >= 406 && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201000L
                         "1"
#else
                         "0"
#endif
                         "c_static_assert\n"
                         "C_FEATURE:"
#if (__GNUC__ * 100 + __GNUC_MINOR__) >= 304 && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
                         "1"
#else
                         "0"
#endif
                         "c_variadic_macros\n"
 
                        };
 
int main(int argc, char** argv)
{
    (void)argv;
    return features[argc];
}