gcc/testsuite/gcc.dg/alias-7.c

   1 /* { dg-do run } */
   2 /* { dg-require-alias "" } */
   3 /* { dg-options "-O2" } */
   4
   5 extern void abort (void);
   6
   7 #define ASMNAME(cname)  ASMNAME2 (__USER_LABEL_PREFIX__, cname)
   8 #define ASMNAME2(prefix, cname) STRING (prefix) cname
   9 #define STRING(x)    #x
  10
  11 int foo __asm__ (ASMNAME ("foo")) __attribute__((nocommon));
  12 extern __typeof (foo) bar __attribute__ ((weak, alias ("foo")));
  13
  14 int
  15 main (void)
  16 {
  17   if (&foo != &bar || foo || bar)
  18     abort ();
  19   return bar;
  20 }