gcc/testsuite/gcc.dg/pr39565.c

   1 /* PR39565: Static variable leaves undefined symbol in object file.
   2    Variables codestrs_4 and codestrs_8 should not be undefined,
   3    when this program is compiled at -O2. As a basic sanity test,
   4    verify that this program compiles into an executable and runs. */
   5
   6 /* { dg-do run } */
   7 /* { dg-options "-O2" } */
   8
   9 extern void abort (void);
  10 extern void exit (int);
  11 extern int strcmp (const char *, const char *);
  12
  13 static const union codestrs_t_4 {
  14   struct {
  15     char str_2[sizeof ("Illegal opcode")];
  16   };
  17   char str[0];
  18 } codestrs_4 = { {"Illegal opcode"} };
  19
  20 static const union codestrs_t_8 {
  21   struct {
  22     char str_12[sizeof ("Integer divide by zero")];
  23   };
  24   char str[0];
  25 } codestrs_8 = { {"Integer divide by zero"} };
  26
  27 const char *
  28 psiginfo (int pinfo)
  29 {
  30   const char *base = ((void *)0);
  31
  32   switch (pinfo)
  33     {
  34     case 4: base = codestrs_4.str; break;
  35     case 8: base = codestrs_8.str; break;
  36     }
  37   return base;
  38 }
  39
  40 int
  41 main (void)
  42 {
  43   if (strcmp (psiginfo (4), codestrs_4.str))
  44     abort ();
  45   if (strcmp (psiginfo (8), codestrs_8.str))
  46     abort ();
  47   exit (0);
  48 }