* exceptions.cc (call_handler): Make signal pending if sigsave.sig is still

active.
* syscalls.cc (_read): Don't clear errno.
* sigproc.cc (wait_sig): Don't scan the waiting process list after a SIGCHLD if
there are no zombies to reap.
* winsup.h: Use __builtin_strcmp.
* environ.cc (posify): Don't initialize len unless it is required
(from DJ Delorie <dj@redhat.com>).

winsup/cygwin/environ.cc

@@ -113,11 +113,12 @@ posify (char **here, const char *value)
 {
   char *src = *here;
   win_env *conv;
-  int len = strcspn (src, "=") + 1;
 
   if (!(conv = getwinenv (src)))
     return;
 
+  int len = strcspn (src, "=") + 1;
+
   /* Turn all the items from c:<foo>;<bar> into their
      mounted equivalents - if there is one.  */