ref: 3eb88c0d7a390c249fd74f973b6e6f14549b6a39 dir: /tests/cc/execute/0125-fundcl.c/
int f(int a), g(int a), a; int main() { return f(1) - g(1); } int f(int a) { return a; } int g(int a) { return a; }