I have made a test release for gsl-1.9.
I have only tested it on GNU/Linux -- please report any problems you
find in compiling it, running make check or against existing
applications (it should be backwards compatible).
It is available at the following location:
http://www.network-theory.co.uk/download/gsl/gsl-1.8.90.tar.gz
http://www.network-theory.co.uk/download/gsl/gsl-1.8.90.tar.gz.sig
The main new features from the ChangeLog are:
** Added support for nonsymmetric eigensystems (Patrick Alken)
** Added Mathieu functions (Lowell Johnson)
** Added a new BFGS2 minimisation method, requires substantially fewer
function and gradient evaluations that the existing BFGS minimiser.
** Added new functions for basis splines (Patrick Alken)