libc {
GLIBC_2.1 {
# functions used in other libraries
__backtrace; __backtrace_symbols; __backtrace_symbols_fd;
# b*
backtrace; backtrace_symbols; backtrace_symbols_fd;
}
GLIBC_2.2 {
# These are to support some gcc features.
__cyg_profile_func_enter; __cyg_profile_func_exit;