ref: 68111eb68c383a0a0166b452ba5b4e7c50afb5a0 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; }