1/* { dg-do compile } */ 2/* { dg-options "-std=c89 -pedantic" } */ 3 4#define f(a,b) f2(a,,b) 5#define f2(a,b,c) a; b; c; 6#define f3(a) a 7 8#define g() p() 9 10void p(void) {} 11 12 13void foo(void) 14{ 15 f(p(),p()); /* { dg-warning "macro f2 argument 2: empty macro arguments are undefined" } */ 16 f2(p(),,p()); /* { dg-warning "macro f2 argument 2: empty macro arguments are undefined" } */ 17 f3(); /* { dg-warning "macro f3 argument 1: empty macro arguments are undefined" } */ 18 g(); 19} 20