Date: Sat, 28 Apr 2001 03:59:16 -0300 From: Joao Carlos Mendes Luis <jonny@jonny.eng.br> To: Dimitry Andric <dim@xs4all.nl> Cc: stable@FreeBSD.ORG, "=?iso-8859-1?Q?Jo=E3o?= Carlos Mendes =?iso-8859-1?Q?Lu=EDs?=" <jonny@embratel.com.br> Subject: Re: Trouble with 4.3-RELEASE compiler Message-ID: <3AEA6A44.8936FF61@jonny.eng.br> References: <20010427194022.A18639@roma.coe.ufrj.br> <200104280127330789.011EEEF5@tensor.xs4all.nl>
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Dimitry Andric wrote:
> On 2001-04-27 at 19:40 Joao Carlos Mendes Luis wrote:
> > I was installing a squid server with 4.3-RELEASE, and found that
> >FreeBSD has now a bug in the compiler that affects squid. The
> >default compilation of squid is with CFLAGS=-g -O2 -Wall, and this
> >setup
> >triggers the bug.
>
> This is a fragment from the Squid configure file (from the original
> 2.4-STABLE1 distribution):
>
> # Remove optimization for GCC 2.95.[12]
> # gcc -O[2] on *BSD and Linux (x86) causes pointers to magically
> become NULL
> if test "$GCC" = "yes"; then
> GCCVER=`$CC -v 2>&1 | awk '$2 == "version" {print $3}'`
> case "$GCCVER" in
> 2.95.[12])
> echo "Removing -O for gcc on $host with GCC $GCCVER"
> CFLAGS="`echo $CFLAGS | sed -e 's/-O[0-9]*//'`"
> ;;
> esac
> fi
>
> This was probably written before gcc 2.95.3 got out, but I'm not sure
> if that version fixed the problem. I have foolishly tried to compile
> Squid with gcc 2.95.2 and optimization (both -O, -O2 and -O666), and
> I can assure you it bombed out with inexplicable null pointer
> accesses. Yet when you compile with -O0, no such thing happens...
That's it! I did not notice that -O2 was not inserted when using
gcc 2.95.2.
Thanks a lot!
Jonny
--
João Carlos Mendes Luís jonny@embratel.net.br
Networking Engineer jonny@jonny.eng.br
Internet via Embratel jcml@ieee.org
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