Re: [gentoo-user] CFLAGS for both AMD64 and Intel?

[Manuel McLure <manuel@mclure.org>]

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On Sun, Dec 3, 2017 at 12:08 AM, Walter Dnes <waltdnes@waltdnes.org> wrote:

>
> https://gcc.gnu.org/onlinedocs/gcc-6.4.0/gcc/x86-Options.html#x86-Options
> lists what instruction sets gcc expects for any "-march=<whatever>"
>
>   I would suggest rebuilding with...
>
> CFLAGS="-march=nocona -O2 -pipe"
> CPU_FLAGS_X86="mmx sse sse2 sse3"
>
>   nocona was the first Intel cpu to support AMD64 instructions, and it's
> the newest Intel that does not exceed your AMD.  The next Intel cpu, the
> "core2" supports ssse3 which your AMD does not (count the "s"'s... very
> carefully; sse3 != ssse3).
>
>
Thanks! I have successfully rebuilt the system with "-march=nocona -O2
-pipe" (and switched to gcc 6.4.0/profile 17 while I was at it) and
everything seems to be running fine. Hopefully I can pick up a micro-ATX
LGA1156 motherboard for cheap and can do the processor upgrade soon.

-- 
Manuel A. McLure WW1FA <manuel@mclure.org> <http://www.mclure.org>
...for in Ulthar, according to an ancient and significant law,
no man may kill a cat.                       -- H.P. Lovecraft

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