ref: f482bbbc27c14ba303837d0480f0678c8f9f4a9d
dir: /tests/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