ref: 19f4d62e77c2b66116a48c6605f2cc9f239e53b0 dir: /tests/cc/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