ref: e3c686dd24c18b30bbe1f3c78627a5316a0c8c27 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; }