ref: 08a32f26c08c322c5549b94c05032d2e87f1df3c
dir: /tests/cc/execute/0077-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