From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Thompson, David" <dthompson2@worcester.edu>
Subject: Re: [PATCH] gnu: lapack: Build the LAPACKE library.
Date: Fri, 3 Jun 2016 12:39:24 -0400
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To: Eric Bavier <ericbavier@openmailbox.org>
Cc: guix-devel <guix-devel@gnu.org>, Guix-devel <guix-devel-bounces+ericbavier=openmailbox.org@gnu.org>, David Thompson <davet@gnu.org>

On Fri, May 27, 2016 at 1:55 PM, Eric Bavier <ericbavier@openmailbox.org> wrote:
> On 2016-05-27 12:08, Leo Famulari wrote:
>>
>> On Wed, May 25, 2016 at 09:52:05AM -0400, David Thompson wrote:
>>>
>>> From: David Thompson <davet@gnu.org>
>>>
>>> * gnu/packages/maths.scm (lapack)[arguments]: Add "-DLAPACKE=ON".
>>
>>
>> Builds for me on x86_64.
>
> How much does this add to the size of the lapack package?  Would we want to
> install the libraries and headers into another output?  IFAIK, not many
> codes make use of both the standard interface and LAPACKE at the same time.

Before:

store item                                                       total    self
/gnu/store/dkz7fips64c5h05hfg6lmvhmb7jlipb6-lapack-3.5.0
71.4     6.4   9.0%
/gnu/store/gaximh48qbqf4712bw224ghq919hqp64-gfortran-4.9.3-lib
64.9    27.1  38.0%
/gnu/store/8m00x5x8ykmar27s9248cmhnkdb2n54a-glibc-2.22
37.9    36.5  51.1%
/gnu/store/5y72ql4zbnbd50lf88k91k0y766kq75x-bash-static-4.3.42
1.4     1.4   2.0%
total: 71.4 MiB

After:

store item                                                       total    self
/gnu/store/1whq33kw6136h4jcy14cfk1klx5hn1s3-lapack-3.5.0
97.2     9.4   9.6%
/gnu/store/gaximh48qbqf4712bw224ghq919hqp64-gfortran-4.9.3-lib
64.9    27.1  27.9%
/gnu/store/v39bh3ln3ncnzhyw0kd12d46kww9747v-gcc-4.9.3-lib
60.7    22.9  23.5%
/gnu/store/8m00x5x8ykmar27s9248cmhnkdb2n54a-glibc-2.22
37.9    36.5  37.5%
/gnu/store/5y72ql4zbnbd50lf88k91k0y766kq75x-bash-static-4.3.42
1.4     1.4   1.4%
total: 97.2 MiB

Basically, closure size goes up by 20MiB, but the store item itself is
only 3MiB bigger.

WDYT?

- Dave