Date: Sun, 19 Aug 2007 09:39:53 +0200 From: Stefan =?iso-8859-1?Q?E=DFer?= <se@FreeBSD.org> To: Ken Yamada <ken@tydfam.jp> Cc: glewis@eyesbeyond.com, anrays@gmail.com, lists_freebsd_org@07.antispam.web-wahnsinn.de, freebsd-java@freebsd.org, freebsd-current@freebsd.org Subject: Re: Gcc bugs break java/jdk15 build? [Workaround] Message-ID: <20070819073953.GA36594@Gatekeeper.FreeBSD.org> In-Reply-To: <20070819.120136.41629169.ken@tydfam.jp> References: <20070815144804.GC5151@misty.eyesbeyond.com> <20070818.213208.74754361.ken@tydfam.jp> <864piweemc.fsf@santinel.home.ua> <20070819.120136.41629169.ken@tydfam.jp>
next in thread | previous in thread | raw e-mail | index | archive | help
On 2007-08-19 12:01 +0900, Ken Yamada <ken@tydfam.jp> wrote: > Does this mean that GCC 4.2.1 does not solve "loop optimization bug" > pointed out by Andrey Chernov (http://docs.freebsd.org/cgi/getmsg.cgi?fetch=282888+0+archive/2007/freebsd-current/20070701.freebsd-current) on 4.2.0? > > Is it a good idea of adding -fno-tree-vrp to CFLAGS in /etc/make.conf > to avoid this optimization bug for all compilation? (BTW, I leave -O3 > of CFLAGS as is in make.conf and just added -fno-tree-vrp to the end of > the line.) I did just that (added -fno-tree-vrp to CFLAGS) after it was found that gcc-4.2 had the optimizer bug, and have continued to build my system with -O2 (or other optimization levels as required). This seems to work just fine (no problems with ports that are not working when built with a plain -O2). I had suggested to make -fno-tree-vrp the default for our CC (could be overridden on the command line, but would allow to use all -O levels without being hit by the compiler bug; but it appears that nobody else liked the idea at that time, i.e. no response at all ...). Regards, STefan
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20070819073953.GA36594>