gcc/testsuite/gcc.dg/attr-copy.c

   1 /* PR middle-end/81824 - Warn for missing attributes with function aliases
   2    Exercise error handling for attribute copy.
   3    { dg-do compile }
   4    { dg-require-alias "" }
   5    { dg-options "-O2 -Wall" } */
   6
   7 #define ATTR(list)   __attribute__ (list)
   8
   9 /* Verify incorrect numbers of arguments.  */
  10 ATTR ((copy)) void
  11 fno_args (void);              /* { dg-error "wrong number of arguments specified for .copy. attribute" } */
  12
  13 ATTR ((copy ())) void
  14 fno_args2 (void);             /* { dg-error "wrong number of arguments specified for .copy. attribute" } */
  15
  16 ATTR ((copy (fno_args, fno_args))) void
  17 fmlti_args (void);            /* { dg-error "wrong number of arguments specified for .copy. attribute" } */
  18
  19 /* Verify that referencing an undeclared symbol is rejected with an error.  */
  20
  21 ATTR ((copy (foobar)))        /* { dg-error ".foobar. undeclared" } */
  22 void fundeclared (void);
  23
  24 /* Verify that using a string argument triggers a descriptive error
  25    (given attributes like alias and weakref using a string is a likely
  26    mistake).  */
  27
  28 ATTR ((copy ("foobar")))
  29 void fstring (void);          /* { dg-error ".copy. attribute argument cannot be a string" } */
  30
  31 /* Ditto for an integer.  */
  32
  33 ATTR ((copy (123)))
  34 void fnumber (void);          /* { dg-error ".copy. attribute argument cannot be a constant arithmetic expression" } */