Date: Wed, 27 Jul 2005 15:31:35 +0200 From: Stefan Farfeleder <stefan@fafoe.narf.at> To: jason henson <jason@ec.rr.com> Cc: hackers@freebsd.org Subject: Re: using -ftracer stops buildworld at shutdown.c Message-ID: <20050727133133.GA560@wombat.fafoe.narf.at> In-Reply-To: <42E6BD5F.7020909@ec.rr.com>
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[-- Attachment #1 --]
On Tue, Jul 26, 2005 at 06:46:55PM -0400, jason henson wrote:
> To avoid this warning, the variables and/or arguments should be
> prevented from being optimized by declaring them as volatile.
>
> So I sprinkled some volatiles around, but mostly got more errors that
> said "gcc volatile discards qualifiers from pointer target type" in the
> fprintf functions.
Replacing line 276 with 'FILE *volatile pf;' fixes the warning. But the
usage of {long,set}jmp() is wrong anyway since timeout() can jump back
into timewarn() while that isn't executed at all.
Stefan
[-- Attachment #2 --]
Index: shutdown.c
===================================================================
RCS file: /home/ncvs/src/sbin/shutdown/shutdown.c,v
retrieving revision 1.28
diff -I.svn -u -r1.28 shutdown.c
--- shutdown.c 25 Jan 2005 08:40:51 -0000 1.28
+++ shutdown.c 27 Jul 2005 13:24:29 -0000
@@ -273,7 +273,7 @@
{
static int first;
static char hostname[MAXHOSTNAMELEN + 1];
- FILE *pf;
+ FILE *volatile pf;
char wcmd[MAXPATHLEN + 4];
if (!first++)
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