From Avraham.Adler at guycarp.com  Wed May  9 20:54:17 2012
From: Avraham.Adler at guycarp.com (Adler, Avraham)
Date: Wed, 9 May 2012 13:54:17 -0500
Subject: [Rd] R Installation Manual - ATLAS BLAS guidance that is not in the
 current version
Message-ID: <93A2161604A30C4ABE14AC35CAFC8422B63CF2F4@USDFW11XM32.mercer.com>

Good afternoon.

I am trying to compile a version of Rblas.dll based on ATLAS for the Corei7. I had remembered that there was mention of which file to adjust and that "xerbla" needed to be removed from one of the outputs from the last time I tried a few years ago. The most recent version of the R Installation manual does not say anything about this. An older version (2.10 I believe) has the following text:

      Optionally, you can install a version of ATLAS
      (`math-atlas.sourceforge.net'
      (http://math-atlas.sourceforge.net/)) tuned to your system for
      fast linear algebra routines. Pre-built `Rblas.dll' for various
      Pentium and AthlonXP chips are available in the
      `windows/contrib/ATLAS' area on CRAN.  If you are building R from
      source, there are macros `USE_ATLAS' and `ATLAS_PATH' in the file
      `MkRules'.  Set `USE_ATLAS = YES' and `ATLAS_PATH' to where the
      ATLAS libraries are located.  You will need to make the libraries
      yourself(1): none of the binaries we have seen are compiled for
      the correct compiler.  Since R has its own `xerbla' it is best to
      delete that in ATLAS by
 
           ar d /path/to/libf77blas.a xerbla.o

Would it be possible to restore the above information to the next version of the manual for future reference, please?
 
Thank you,

Avraham Adler


[Rd] R Installation Manual - ATLAS BLAS guidance that is not in the current version
Adler, Avraham