1 /* PR c/61854 */ 2 /* { dg-do run } */ 3 /* { dg-options "-std=c89" } */ 4 5 #define h(x) #x 6 #define s(x) h(x) 7 #define foo // 8 9 int main(void)10 main (void) 11 { 12 if (__builtin_memcmp (s(foo), "//", 3) != 0) 13 __builtin_abort (); 14 return 0; 15 } 16