Otherwise (on systems that have WNOHANG), loop around
to use up all the processes that have something to tell us. */
#if (defined WINDOWSNT \
- || (defined USG && !defined LINUX \
+ || (defined USG && !defined GNU_LINUX \
&& !(defined HPUX && defined WNOHANG)))
#if defined (USG) && ! defined (POSIX_SIGNALS)
signal (signo, sigchld_handler);