[src/trunk]: src/bin/csh bin/csh: Fix the -Wclobber warning.

[fox <fox%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/7259c5df8376
branches:  trunk
changeset: 744545:7259c5df8376
user:      fox <fox%NetBSD.org@localhost>
date:      Wed Feb 05 20:06:17 2020 +0000

description:
bin/csh: Fix the -Wclobber warning.

Mark the variable as volatile as it can be clobbered when a vfork occurs.

Error was reported when build.sh was run with MKLIBCSANITIZER=yes flag.

Reviewed by: kamil@

diffstat:

 bin/csh/sem.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r dfb3577f4c2b -r 7259c5df8376 bin/csh/sem.c
--- a/bin/csh/sem.c     Wed Feb 05 17:13:24 2020 +0000
+++ b/bin/csh/sem.c     Wed Feb 05 20:06:17 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: sem.c,v 1.31 2019/01/05 16:54:00 christos Exp $ */
+/* $NetBSD: sem.c,v 1.32 2020/02/05 20:06:17 fox Exp $ */
 
 /*-
  * Copyright (c) 1980, 1991, 1993
@@ -34,7 +34,7 @@
 #if 0
 static char sccsid[] = "@(#)sem.c      8.1 (Berkeley) 5/31/93";
 #else
-__RCSID("$NetBSD: sem.c,v 1.31 2019/01/05 16:54:00 christos Exp $");
+__RCSID("$NetBSD: sem.c,v 1.32 2020/02/05 20:06:17 fox Exp $");
 #endif
 #endif /* not lint */
 
@@ -67,7 +67,7 @@
     struct biltins * volatile bifunc;
     int pv[2], pid;
     sigset_t nsigset;
-    int forked;
+    volatile int forked;
 
     UNREGISTER(forked);
     UNREGISTER(bifunc);