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