[Nix-dev] CPU optimized packages

[Danny Wilson]

With help of the gentoo wiki ( 
http://en.gentoo-wiki.com/wiki/Hardware_CFLAGS )
I found this produces a nice GCC option list:

echo "" | gcc -O3 -march=native -mtune=native -v -E - 2>&1 |grep cc1 
|sed -r 's/.*? - -(.*)$/-\1/'



> Danny Wilson <mailto:danny at prime.vc>
> 7 februari 2013 12:37
> I'd like some packages to be optimized for my server CPU. GCC has
> -march=native for this, but that would not generate a cpu specific nixos
> hash.
>
> Is there a nix expression available which adds something like this:
> gcc -march=native -Q --help=target |grep enabled
>
> to CFLAGS and correctly hashing it?
>
>
>
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