ref: 94f23734015424515144b54f0a9f9d6c9d2f34c2 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; }