1  #include <stdio.h>
       2  
       3  extern unsigned int foo (void);
       4  
       5  __attribute__((visibility("hidden"))) unsigned int var = 0xdeadbeef;
       6  
       7  int main (void)
       8  {
       9    if (var == foo ())
      10      puts ("PASS");
      11  
      12    return 0;
      13  }