Re: [Rd] R-.12.0 atlas lapack

From: luxInteg <lux-integ_at_btconnect.com>
Date: Mon, 22 Nov 2010 17:59:13 +0000

On Saturday 20 November 2010 22:35:02 luxInteg wrote:
> Greetings,
>
> I last built R-2.11.1 a few months ago. The computer was equipped with
> these:-
>
> ---cpu amd64 2 cores
> ---o/s cblfs 64-bit only linux kernel-2.6.32 gcc-4.4.2 jdk(1.5)-6U20?
> ---bls atlas3.9.26 lapacck-3.2.1
>
> I obtained an installed directory of ~58Mbytes and in the ~/lib
> directory was libR.so (~7.8Mbytes in size) as well as libRblas.so and
> libRlapack.so (~2.9Mbytes).
>
> I have since upgraded atlas to atlas3.9.32 and lapack to lapack-3.2.2. to
> fulfill requirements of other numeric intensive programs I use. Today I
> compiled and installed R-2.12.0 using the same settings used for
> R-2.11.1 and these are my findings:-
>
> {The installed directory is ~42Mbytes and in the ~/lib directory there is
> but libR.so of only 2.9 mbytes. There are no libRlapack.so nor
> libRblas.so}
>
>
> I would be grateful if someone culd explain the discrepencies between
> the two versions of R and what the requirements are for generating
> linRlapack.so and libRblas.so and/or whether these have been superceded.
>
>
> thanks in advance..

excerpt from /R-2.12.0/src/modules/lapack/README

(
The Fortran routines here are extracted from LAPACK 3.1.0, then 3.1.1 (http://www.netlib.org/lapack and mirrors).

dlapack?.f are support routines for `real' LAPACK calls cmplx.f are support routines for LAPACK calls from complex arithmetic routines, that are only used if COMPLEX*16 is supported by the Fortran compiler and compatible with the Rcomplex type (guaranteed for f2c users). Neither will not be compiled if an external LAPACK is used.

)

As I said in my original email, I have external atla3.9.32 and lapack-3.2.2. I would be grateful to know if:-

  1. libRblas.so and libRlapack.so are now superfluouss AND if hey are
  2. if one now links libR.so to lib{atlas,lapack}.so (or .a)

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