gcc/testsuite/gcc.dg/cpp/c90-empty-macro-args.c

   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
  10 void p(void) {}
  11
  12
  13 void 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 }