Date: Fri, 11 Aug 1995 16:26:09 -0700 From: David Greenman <davidg@Root.COM> To: =?KOI8-R?Q?=E1=CE=C4=D2=C5=CA_=FE=C5=D2=CE=CF=D7?= (aka Andrey A. Chernov, Black Mage) <ache@astral.msk.su> Cc: CVS-commiters@freefall.freebsd.org, cvs-share@freefall.freebsd.org Subject: Re: cvs commit: src/share/mk sys.mk Message-ID: <199508112326.QAA26825@corbin.Root.COM> In-Reply-To: Your message of "Fri, 11 Aug 95 17:27:46 %2B0400." <TBIhrAmmD0@astral.msk.su>
next in thread | previous in thread | raw e-mail | index | archive | help
>In message <199508111147.EAA17376@freefall.FreeBSD.org> David Greenman > writes: > >>davidg 95/08/11 04:47:31 > >> Modified: share/mk sys.mk >> Log: >> Changed default optimization from -O2 back to -O...gcc 2.6.* has serious >> bugs when using -O2. > >Maybe add -fno-strength-reduce instead? Until the precise reason for the optimization failure is known, it isn't safe to use all of the optimizations in -O2. The fact that -fno-strength-reduce appears to affect the problem doesn't mean that the bug is in the strength reduction code. I saw no measurable improvement in system performance when we went to -O2, and all things considered, I think it is much safer to just stick with -O for now. -DG
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199508112326.QAA26825>