#if DEFAULT_C11 #if __STDC_VERSION__ < 201112L #error Unexpected value for __STDC_VERSION__. #endif #elif DEFAULT_C99 #if __STDC_VERSION__ != 199901L #error Unexpected value for __STDC_VERSION__. #endif #else #if !DEFAULT_C90 #error Buildsystem error #endif #if defined(__STDC_VERSION__) && \ !(defined(__SUNPRO_C) && __STDC_VERSION__ == 199409L) #error Unexpected __STDC_VERSION__ definition #endif #endif int main() { return 0; }