debug/Versions

   1 libc {
   2   GLIBC_2.1 {
   3     # functions used in other libraries
   4     __backtrace; __backtrace_symbols; __backtrace_symbols_fd;
   5
   6     # b*
   7     backtrace; backtrace_symbols; backtrace_symbols_fd;
   8   }
   9   GLIBC_2.2 {
  10     # These are to support some gcc features.
  11     __cyg_profile_func_enter; __cyg_profile_func_exit;
  12   }
  13 }