Date: Thu, 13 Jan 2005 16:17:31 +0100 From: Idar Tollefsen <idart@performancedesign.no> To: Angus MacGyver <macgyver@calibre-solutions.co.uk> Cc: freebsd-alpha@freebsd.org Subject: Re: Question... Alpha Compile optimizations.... Message-ID: <41E6910B.7@performancedesign.no> In-Reply-To: <1105601068.4123.4767.camel@yavin4.calibre-solutions.co.uk> References: <1105601068.4123.4767.camel@yavin4.calibre-solutions.co.uk>
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Angus MacGyver wrote: > I am just wondering, after reading the sample make.conf from > 5.3-RELEASE, what is the nature of the bugs that MAY appear if I use > CFLAGS= -O2 -pipe > as the optimisation flags. Wasn't the -O2 problem fixed in GCC 3.x? Although I can't remember what 'x'... > I have done so before on a 4.9 system, and have not experienced any > problem that i could see, tho I did see an improvement in the speed of > the resultant system (always a good thing) I tried to compile the kernel with -O2 once on a 4.8 system. It booted, but didn't run for long before stopping, spawning messages about waiting for some lock (I don't remember the exact message). - IT
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