ref: 6853b1e9d0763d49d00264f9c1cd3edc25c3299b 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; }