LFS performance gain?

vonPulex · 06-22-2003, 04:13 PM

Hello ppl !

What is the performance gain from a LFS aptimized for Athlon ?
What CFLAGS , CXXFLAGS do you suggest ?

thx , bye

gbbenson · 07-06-2003, 12:42 PM

I'm using an AMD T-bird 1.13 GHz, and I always use the following optimizations:

CFLAGS='-O3 -march=athlon-tbird -fomit-frame-pointer'
CXXFLAGS=$CFLAGS

Performance gain? Hmmmm... not sure. I've always used these flags. :-)

citro · 07-08-2003, 01:11 PM

the performance gain surely depends on the applications you use. Some will be faster, some will stay as fast / slow as they are. I myself have a Pentium3, and therefore compiled almost everything with CFLAGS="-O3 -march=pentium3 -mcpu=pentium3"

"Almost" because I did not get some packages to compile when optimizations were set, especially glibc was problematic.

When the LFS book says "don't use optimizations here" you'll save yourself some trouble and time if you just follow that hint...

CU citro