gcc -O flags (was GLIBC Coredump)

Thomas T. Veldhouse veldy at veldy.net
Sat Jul 15 17:43:13 PDT 2000


I use -march=pentiumpro for everything.  I also use -O, but I don't mess
around with anything higher than -O.  I did get burned by it once using
gcc-2.95.2 and FreeBSD.  I think I was building the world and something
refused to work properly.  I don't really remember.

Tom Veldhouse
veldy at veldy.net

On Fri, 14 Jul 2000, Gerard Beekmans wrote:

> > glibc seems to fail compiling with -O3 (I'm not ready with -O2 yet) but
> > how is it with other packages? Are there any more packages that will fail
> > to compile, or worse, compile but fail to work, when using -O2 or -O3 then
> > I would be glad to hear about it. Or should I just give up and use just -O
> > all the time?
> 
> Personally I had no problems at all using -O3 and others like -mcpu and
> -march on Glibc and all the other packages. A few packages in the book
> don't use it because the hassle of editing the Makefile file is too big
> a hassle for what it's worth. But I did confirm that those packages do
> compile fine (on my machine that is)
> 
> -- 
> Gerard Beekmans
> www.linuxfromscratch.org
> 
> -*- If Linux doesn't have the solution, you have the wrong problem -*-
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