Message-ID: <93A2161604A30C4ABE14AC35CAFC8422B63CF2F4@USDFW11XM32.mercer.com>
Date: 2012-05-09T18:54:17Z
From: Adler, Avraham
Subject: R Installation Manual - ATLAS BLAS guidance that is not in the current version
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