ref: a8e2e90fa44baacd3339cdfcb927e3c24ad89190 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; }