gcc/testsuite/gcc.c-torture/compile/981001-4.c

   1 #define P(a,b) P1(a,b)
   2 #define P1(a,b) a##b
   3
   4 #define ONCE(x, y) (x ?: (x = y()))
   5 #define PREFIX
   6
   7 extern int P(PREFIX, init) (void);
   8
   9 int
  10 fun(void)
  11 {
  12   static int memo;
  13   return ONCE(memo, P(PREFIX, init));
  14 }