[R] compiling R with tuned BLAS

[Charles Determan]

Which OS are you using (Windows, Linux (distro), Mac)?  When you mention
.so files I tend to assume you are using a Linux system.  If you are using
ubuntu, changing the BLAS used by R is relatively trivial by using
'update-alternatives'.  More detail is provided at the following link:
http://www.stat.cmu.edu/~nmv/2013/07/09/for-faster-r-use-openblas-instead-better-than-atlas-trivial-to-switch-to-on-ubuntu/

Charles

On Thu, May 21, 2015 at 2:19 PM, Michael Gooch <goochmi at gmail.com> wrote:

> I am looking at the instructions on
> http://cran.r-project.org/doc/manuals/r-patched/R-admin.html#ATLAS
>
> I have noticed that ATLAS produces two shared libs in addition to the *.a
> files:
> http://math-atlas.sourceforge.net/atlas_install/node22.html
>
> contents of the ATLAS lib directory:
> libatlas.a  libcblas.a  libf77blas.a  liblapack.a  libptcblas.a
> libptf77blas.a  libsatlas.so  libtatlas.so
>
> The instructions do not appear to match up with the *.a files & *.so files
> as described. (it appears to want me to use shared libs, but the names
> defined are static libs, not shared libs).
>
> should I simply be having it link against libtatlas.so (and pthreads) for
> shared threaded atlas and libsatlas.so for shared sequential atlas?
> do I need shared versions of the other static libraries?
>
> I think the help is a bit out of date, or at least unclear as to what it
> intends of me.
>
> M. Gooch
>
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