ref: 8a651eca19fb38f1585c51dcc5d7f8307ad80ffd dir: /tests/execute/0154-if-defined/
#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; }