ref: 8604fd05150d98be7c9503ec9a97b63f05371ff7
dir: /tests/cc/execute/0175-defined.c/
#if defined X X #endif #if defined(X) X #endif #if X X #endif #define X 0 #if X X #endif #if defined(X) int x = 0; #endif #undef X #define X 1 #if X int main() { return 0; } #endif