[SciPy-user] Confused Newbie

Nils Wagner nwagner at mecha.uni-stuttgart.de
Tue Apr 16 08:41:04 CDT 2002

Mike Sowka schrieb:
> Thank You for the clarification,
> I'm having a bit of a hard time getting SciPy 0.2 going... more
> specifically, after having built atlas for the past 24 hours! I'm don't
> see ANY instructions on how to actually "install" it into my linux
> distro after it has been built.
> To build atlas I used 'make install arch=Linux_PII' but it didn't copy
> files to /usr/bin/ or /usr/lib after building at any point...
> Am I missing something here?
> Thank You,
> Mike

Please check ../ATLAS/lib/Linux_PII 

Also note that

ATLAS does not provide a full LAPACK library. However, there is a simple
way to get ATLAS to provide its faster LAPACK routines to a full LAPACK
library. ATLAS's
internal routines are distinct from LAPACK's, so it is safe to compile
ATLAS's LAPACK routines directly into a netlib-style LAPACK library.
First, download and install the
standard LAPACK library from the LAPACK homepage. Then, in your
ATLAS/lib/ARCH directory (where you should have a liblapack.a), issue
the following commands: 

  mkdir tmp
  cd tmp
  ar x ../liblapack.a
  cp <your LAPACK path & lib> ../liblapack.a
  ar r ../liblapack.a *.o
  cd ..
  rm -rf tmp

Just linking in ATLAS's liblapack.a first will not get you the best
LAPACK performance, mainly because LAPACK's untuned ILAENV will be used
instead of ATLAS's tuned
one. So, if you use any LAPACK routine that is not provided by ATLAS, it
is essential that you create this hybrid LAPACK/ATLAS library in order
to get the best performance.

Copy *.a to /usr/local/lib/atlas


> On Mon, 2002-04-15 at 17:57, eric wrote:
> > It uses fftpack.   Its still possible to use fftw, but it isn't used by default.
> > The fftpack source code comes with and is automatically built by SciPy.
> >
> > eric
> >
> --
> /*******************************************************************\
> |      Mike Sowka                   o      _     _         _        |
> | An Aspiring Engi"Nerd"    _o     /\_   _ \\o  (_)\__/o  (_)       |
> |  Carleton University    _< \_   _>(_) (_)/<_    \_| \   _|/' \/   |
> | msowka at doe.carleton.ca (_)>(_) (_)        (_)   (_)    (_)'  _\o_ |
> | (home mike at sowka.com)                                             |
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