Re: [Nix-dev] CPU optimized packages

Danny Wilson Thu, 07 Feb 2013 04:36:55 -0800

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

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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Re: [Nix-dev] CPU optimized packages

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