Date: Mon, 10 Feb 2003 00:01:32 +0800 From: Adrian Chadd <adrian@freebsd.org> To: Terry Lambert <tlambert2@mindspring.com>, Ray Kohler <ataraxia@cox.net>, freebsd-current@freebsd.org Subject: Re: Compiling with high optimization? Message-ID: <20030209160132.GC33928@skywalker.creative.net.au> In-Reply-To: <20030209150120.GA2263@HAL9000.homeunix.com> References: <20030208173756.GA56030@arkadia.nv.cox.net> <20030208232724.GA20435@HAL9000.homeunix.com> <3E459BF3.BB3FC381@mindspring.com> <20030209002542.GA20812@HAL9000.homeunix.com> <20030209141006.GB33928@skywalker.creative.net.au> <20030209150120.GA2263@HAL9000.homeunix.com>
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On Sun, Feb 09, 2003, David Schultz wrote: > > Yet squid under i386 freebsd is .. well, finds -O bugs in gcc. > > We gave up trying -O under FreeBSD a long time ago. :-) > > The last time someone told me, ``gcc -O is broken'', it turned out > that they were doing some stack fiddling, and gcc's optimizations > broke their faulty assumptions. On the other hand, I'm sure gcc -O > does have bugs. Do you have an example snippet that gets miscompiled? Err, grab the squid24 port, hack the configure script to remove the bit where it removes -O for FreeBSD, compile, install, run. It should die quite quickly after you submit a HTTP request which requires a DNS lookup - GCC generates an xor %eax, %eax at the beginning of a function which NULLs a pointer - that we're not NULLing. :-) Adrian -- Adrian Chadd <angryskul> learning is bad <adrian@FreeBSD.org> <angryskul> it just makes the people around you dumber (angryskul == alfred@irc) <angryskul> :( To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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