Re: [gentoo-alt] does virtual/cblas work?

[Michael Yang]

Hi guys,

I successfully emerged dev-python/numpy-1.3.0 and
dev-python/scipy-0.7.0 but only with a lot of re-working of
blas/cblas/lapack to work with eselect properly.  Without this,
numpy/scipy will fail or link incorrectly to /usr/lib/ libraries.  I
wanted to share this to help other users and recommend the following
changes to the prefix overlay:

 * unmask and patch sci-libs/cblas-reference
 * patch sci-libs/blas-reference
 * patch sci-libs/lapack-reference
(see gentoo bug #277849 for patches)
 * unmask virtual/cblas (required by scipy and numpy w/ USE=lapack)

to emerge scipy I still needed to point to the BLAS/LAPACK libraries
$ env BLAS=${EPREFIX}/usr/lib LAPACK=${EPREFIX}/usr/lib emerge scipy

or else the scipy build fails with warnings.warn(BlasNotFoundError.__doc__)

On Sun, Jul 12, 2009 at 4:49 PM, Aaron Wilson<tallest@×××××.com> wrote:
> I've installed goto-blas, cblas-reference, and lapack-reference by pulling
> the ebuilds into my overlay. I did not install virtual/cblas, and I do not
> use any of the eselct packages (they're installed, but 'eselect blas list'
> gives nothing). It would be nice to have these features working, perhaps
> I'll try to poke around and see what's gong wrong.
>
> Aaron
>
>
> On Jul 11, 2009, at 11:11 AM, Michael Yang wrote:
>
>> Hi guys,
>>
>> I'm trying to install sci-libas/scipy which depends on virtual/cblas
>> and virtual/lapack.  I noticed that virtual/cblas is not in the prefix
>> overlay, so I used ecopy to try to emerge it myself.  Emerge was
>> successful, but I ran into lapack problems since "eselect blas set 1"
>> doesn't seem to be prefix-aware and tries to make symbolic links in
>> /usr/lib and /usr/lib/pkgconfig rather than ${EPREFIX}/usr/lib and
>> ${EPREFIX}/usr/lib/pkgconfig.  See gentoo bug #277447 for more detail.
>>
>> General question:  am I missing something or does the prefix overlay
>> not support blas/cblas/atlas yet?
>>
>
>
>