Informations about gcc optimization

Simon Comeau Martel martelsc at
Sat Oct 12 08:05:51 PDT 2002

On Sat, 12 Oct 2002 01:10:00 +0100 (BST)
Ken Moffat <ken at> wrote:

> These days I
> normally build LFS with -Os

-Os = Optimization for size and -O2 ??

If it's that, I think that I'll use the following to build LFS:

CFLAGS="-Os -s -fomit-frame-pointer -march=i686"
CXXFLAGS="-Os -s -fomit-frame-pointer -march=i686"

(Unsetting them all when the book suggest it)

And for all other packages after:

CFLAGS="-O3 -s -fomit-frame-pointer -march=i686"
CXXFLAGS="-O3 -s -fomit-frame-pointer -march=i686"

Any objection?
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