ref: 94f23734015424515144b54f0a9f9d6c9d2f34c2 dir: /tests/cc/execute/0154-if_defined.c/
#if defined(FOO) int a; #elif !defined(FOO) && defined(BAR) int b; #elif !defined(FOO) && !defined(BAR) int c; #else int d; #endif int main(void) { return c; }