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 }