Build on Different Machine?

[padeen]

I want to build on an Athlon XP2000+ for use on an old Pentium I 133. I plan to tar up the entire tree and copy it over to the old machine, then untar it and bingo!, I should have a gentoo optimized for the old machine.

From what I've understood of the install manual, I should set the flags like this:
CHOST="I686-PC-LINUX-GNU" ; build on new machine
CFLAGS="-march=i586 -O3 -funroll-loops -pipe"

and not like this:
CHOST="I586-PC-LINUX-GNU" ; build for old machine
CFLAGS="-march=i586 -O3 -funroll-loops -pipe"

Can someone confirm the correct flags?

Thanks

[shifted]

The pentium cannot understand i686 instructions. To build for the pentium, you need i586 set not i686.

[padeen]

Thanks. I wan't sure whether CHOST referred to the build machine or the target machine.