ref: 9cdf8d4b4c9ecf24e8e065fdbf9a6aea48d5f4af dir: /tests/execute/0065-ifdef.c/
#ifdef FOO XXX #ifdef BAR XXX #endif XXX #endif #define FOO 1 #ifdef FOO #ifdef FOO int x = 0; #endif int main() { return x; } #endif