modernc.org/cc@v1.0.1/testdata/gcc-6.3.0/gcc/testsuite/gcc.c-torture/compile/builtin_constant_p.c (about)

     1  int main (int argc, char *argv[])
     2  {
     3    static int a[] = { __builtin_constant_p (argc) ? 1 : 0 };
     4    return a[0];
     5  }
     6