directly; use instead." #endif /* Helper functions to issue warnings and errors when needed. */ extern long int __fdelt_chk (long int __d); extern long int __fdelt_warn (long int __d) __warnattr ("bit outside of fd_set selected"); #undef __FD_ELT #define __FD_ELT(d) \ __extension__ \ ({ long int __d = (d); \ (__builtin_constant_p (__d) \ ? (0 <= __d && __d < __FD_SETSIZE \ ? (__d / __NFDBITS) \ : __fdelt_warn (__d)) \ : __fdelt_chk (__d)); })