ref: a004412434813b0500807d46d09c2d0cef13205d
dir: /tests/cc/execute/0176-macro.c/
#ifdef __STDC__ #define __(proto) proto #else #define __(proto) () #endif extern int func __((int, int)); int main() { int (*fun)(int,int) = func; return (*func)(2, 1); } int func(int a, int b) { return a - b - 1; }