Locally optimized lapack and blas libraries for octave on cygwin

[James R. Phillips]

The current octave install on cygwin depends on the cygwin lapack package,
which is designed to facilitate the build and installation of a locally
optimized lapack/blas library if the source package is installed.  This can
improve the speed of matrix operations by an order of magnitude for
medium-sized problems.

I am interested in receiving install reports from those octave users on cygwin
who wish to try this.  Please send any problem reports to this mailing list, or
optionally to the address@hidden mailing list.

To get started, assuming octave is already installed, use the cygwin setup.exe
program to install the source package for lapack.  This will unpack in
/usr/src/lapack-3.0-2.  You may want to move or copy this directory tree to a
personal directory before attempting the build.  Follow the instructions in
lapack-3.0-2/CYGWIN-PATCHES/README.optimize.  Note that the atlas software may
require several hours of compiling to produce a fully optimized library.

James R. Phillips
Volunteer cygwin octave maintainer



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