gcc/testsuite/gcc.dg/weak/weak-3.c

   1 /* { dg-do compile } */
   2 /* { dg-require-alias "" } */
   3 /* { dg-require-weak "" } */
   4 /* { dg-options "-fno-common -Waddress" } */
   5 /* { dg-skip-if "" { x86_64-*-mingw* } } */
   6
   7 /* { dg-final { scan-assembler "weak\[^ \t\]*\[ \t\]_?ffoo1a" } } */
   8 /* { dg-final { scan-assembler "weak\[^ \t\]*\[ \t\]_?ffoo1b" } } */
   9 /* { dg-final { scan-assembler "weak\[^ \t\]*\[ \t\]_?ffoo1c" } } */
  10 /* { dg-final { scan-assembler-not "weak\[^ \t\]*\[ \t\]_?ffoo1d" } } */
  11 /* { dg-final { scan-assembler "weak\[^ \t\]*\[ \t\]_?ffoo1e" } } */
  12 /* { dg-final { scan-assembler "weak\[^ \t\]*\[ \t\]_?ffoo1f" } } */
  13 /* { dg-final { scan-assembler "weak\[^ \t\]*\[ \t\]_?ffoo1g" } } */
  14
  15 /* test function addresses with __attribute__((weak)) */
  16
  17 extern void * ffoo1a (void) __attribute__((weak));
  18 extern void * ffoo1a (void);
  19 void * foo1a (void)
  20 {
  21   return (void *)ffoo1a;
  22 }
  23
  24
  25 extern void * ffoo1b (void);
  26 extern void * ffoo1b (void) __attribute__((weak));
  27 void * foo1b (void)
  28 {
  29   return (void *)ffoo1b;
  30 }
  31
  32
  33 extern void * ffoo1c (void);
  34 void * foo1c (void)
  35 {
  36   return (void *)ffoo1c;
  37 }
  38 extern void * ffoo1c (void) __attribute__((weak));
  39
  40
  41 int ffoo1d (void);
  42 int ffoo1d (void) __attribute__((weak));
  43
  44
  45 extern void * ffoo1e (void);
  46 extern void * ffoo1e (void)  __attribute__((weak));
  47 void * foo1e (void)
  48 {
  49   if (ffoo1e)
  50     ffoo1e ();
  51   return 0;
  52 }
  53
  54
  55 extern void * ffoo1f (void);
  56 void * foo1f (void)
  57 {
  58   if (ffoo1f) /* { dg-warning "" } */
  59     ffoo1f ();
  60   return 0;
  61 }
  62 void * ffoox1f (void) { return (void *)0; }
  63 extern void * ffoo1f (void)  __attribute__((weak, alias ("ffoox1f")));
  64
  65
  66 extern void * ffoo1g (void);
  67 void * ffoox1g (void) { return (void *)0; }
  68 extern void * ffoo1g (void)  __attribute__((weak, alias ("ffoox1g")));
  69 void * foo1g (void)
  70 {
  71   if (ffoo1g)
  72     ffoo1g ();
  73   return 0;
  74 }