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From: ludovic.courtes@inria.fr (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Packaging BLIS
Date: Thu, 07 Sep 2017 17:51:15 +0200
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To: Dave Love <fx@gnu.org>
Cc: guix-devel <guix-devel@gnu.org>

Hello,

Dave Love <fx@gnu.org> skribis:

> Ludovic Court=C3=A8s <ludovic.courtes@inria.fr> writes:

[...]

>> >> One example which has been investigated, and you can't, is BLIS.  You
>>
>> (Why =E2=80=9Cyou can=E2=80=99t?=E2=80=9D  It=E2=80=99s free software AF=
AICS on
>> <https://github.com/flame/blis/tree/master>.)
>
> Well, you could embark on some sort of (GCC-specific?) re-write, but it
> would be better to work on <https://github.com/flame/blis/issues/129>.
> I don't think there's anywhere you can just attach GCC attributes, and
> certainly no magic will happen for currently-unsupported architectures.

That caught my attention so I packaged BLIS:

  https://git.savannah.gnu.org/cgit/guix.git/commit/?id=3D5a7deb117424ff4d4=
30b771b50e534cf065c0ba1

There are several =E2=80=9Cflavors=E2=80=9D of BLIS, so you can always rebu=
ild your
favorite program with:

  --with-input=3Dopenblas=3Dblis-haswell

and similar (or even =E2=80=98--with-graft=3Dblis=3Dblis-haswell=E2=80=99 w=
here applicable).

Hopefully the issue you linked to above will be fixed in future versions
of BLIS, at which point we can probably provide a single =E2=80=9Cblis=E2=
=80=9D package.

Ludo=E2=80=99.