--- /dev/null
+
+ 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]; }