[Trilinos-Users] How to get lapack/blas library consistency?

[Buermann, Lee R]

If what your building is using CMake, you should be able to write a Find Script for LAPACK. Trilinos has one in "yourTrilinosSource/cmake/TPLs/FindTPLLAPACK.cmake" I would think that if you use the same script as Trilinos, you would find the same libraries as Trilinos.

Lee

From: Kurtis Nusbaum [mailto:klnusbaum at gmail.com]
Sent: Wednesday, July 07, 2010 11:07 AM
To: John R Cary; Buermann, Lee R
Cc: Trilinos Users
Subject: Re: [Trilinos-Users] How to get lapack/blas library consistency?

Lee Buermann has actually been doing some work with the way Trilinos detects LAPACK. He might be able to speak to this issue. Lee, any thoughts?

-Kurtis
On Wed, Jul 7, 2010 at 9:51 AM, John R Cary <cary at colorado.edu<mailto:cary at colorado.edu>> wrote:

When we build something with Trilinos, we want (I assume)
to ensure that we use the same lapack libs that Trilinos
uses.  Is there a way to detect this?

I see:

iter.cary$ grep -i lapack TrilinosConfig.cmake
SET(Trilinos_TPL_LIBRARIES "/usr/lib64/liblapack.so;/usr/lib64/libblas.so")
SET(Trilinos_TPL_LIST "LAPACK;BLAS")

which makes me this that those were used, but then I
see:

iter.cary$ ldd lib/libifpack.so | egrep '(lapack|blas|atlas)'
       liblapack.so.3 => /usr/lib64/atlas/liblapack.so.3 (0x00007f61d5999000)
       libblas.so.3 => /usr/lib64/libblas.so.3 (0x00007f61d5743000)
       libf77blas.so.3 => /usr/lib64/atlas/libf77blas.so.3 (0x00007f61d471f000)
       libcblas.so.3 => /usr/lib64/atlas/libcblas.so.3 (0x00007f61d44fe000)
       libatlas.so.3 => /usr/lib64/atlas/libatlas.so.3 (0x00007f61d3c44000)

which seems to indicate that Trilinos chose not to use
the specified libs, but chose to use atlas and the
system blas instead.

I need a strategy that works for static builds, so cannot
use ldd to detect.

Thanks....John

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