R SIG Fedora - Jun 2014 - Centos / Fedora rpm - issue with openblas

I’ve installed R 3.1 with the latest Fedora rpm (R-3.1.0-5.el6.x86_64.rpm) and I
run into some issues with openblas.

I’ve documented this with an open question on stack overflow here:
http://stackoverflow.com/questions/24158372/openblas-r-3-1-and-fedora-centos-dist

Basically before 3.1 I had 3.02 and I was able to install and use openblas
following the instruction from official CRAN documentation, symlinking the
openblas library instead of the “official” one, with a significant improvement
in performance.

Now I do not know how to dynamic-link the openblas libraries anymore, as it
seems that either the address of the standard libs is changed, or the working of
the libraries has changed.

Could somebody be so kind to shed some light?

Many thanks in advance!

Enzo Martoglio
	[[alternative HTML version deleted]]

This is a change in the way that the RPM is built. The RPM for R 3.1.0
does not build its own blas and lapack libraries, but links directly to
external blas and lapack provided by Fedora.  This means that you can no
longer swap out libRblas.so by replacing it with a symbolic link to
openblas.

If you really want openblas then you should install R from source using
the configure option --with-blas="openblas" (Recall that you need to
install the openblas-devel RPM).

Martyn

On Mon, 2014-06-16 at 08:53 +0000, enzo at smartinsightsfromdata.com
wrote:
> 
> I?ve installed R 3.1 with the latest Fedora rpm
> (R-3.1.0-5.el6.x86_64.rpm) and I run into some issues with openblas.
> 
> I?ve documented this with an open question on stack overflow here:
>
http://stackoverflow.com/questions/24158372/openblas-r-3-1-and-fedora-centos-dist
> 
> Basically before 3.1 I had 3.02 and I was able to install and use
> openblas following the instruction from official CRAN documentation,
> symlinking the openblas library instead of the ?official? one, with a
> significant improvement in performance.
> 
> Now I do not know how to dynamic-link the openblas libraries anymore,
> as it seems that either the address of the standard libs is changed,
> or the working of the libraries has changed.
> 
> Could somebody be so kind to shed some light?
> 
> Many thanks in advance!
> 
> Enzo Martoglio
>         [[alternative HTML version deleted]]
> 
> 
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