Gentoo Archives: gentoo-user

From: Manuel McLure <manuel@××××××.org>
To: gentoo-user@l.g.o
Subject: [gentoo-user] CFLAGS for both AMD64 and Intel?
Date: Sun, 03 Dec 2017 07:23:24
1 Here's the situation. I have a system that's been running for many years
2 with an Athlon 5050e processor. The system is built with
4 CFLAGS="-march=k8-sse3 -O2 -pipe -msse3"
5 CPU_FLAGS_X86="3dnow 3dnowext mmx mmxext sse sse2 sse3"
7 I have the possibility of upgrading the system to a first-generation Intel
8 Core i5 which should give a nice speed boost, but of course the Intel chip
9 doesn't understand 3dnow or 3dnowext, so I'll have to do a system rebuild
10 before I switch out the motherboard/processor. It seems pretty obvious that
11 I have to take "3dnow 3dnowext" out of CPU_FLAGS_X86, but what CFLAGS would
12 be recommended for a system that will still run with the AMD processor but
13 won't fall over when I switch to the Intel processor? Once I have the Intel
14 in place I can rebuild with options more suited for that chip, but I want
15 to make sure I don't end up in a catch-22 situation.
17 --
18 Manuel A. McLure WW1FA <manuel@××××××.org> <>
19 ...for in Ulthar, according to an ancient and significant law,
20 no man may kill a cat. -- H.P. Lovecraft


Subject Author
Re: [gentoo-user] CFLAGS for both AMD64 and Intel? Mike Gilbert <floppym@g.o>
Re: [gentoo-user] CFLAGS for both AMD64 and Intel? Walter Dnes <waltdnes@××××××××.org>