[Octave-bug-tracker] [bug #46683] test svds fails

[Rik]

Follow-up Comment #9, bug #46683 (project octave):

@Marco: I like suggestion #1 to use flipud(-s).

For point #2, normest used to use randn but switched to rand in 2010. 
Apparently, nobody got around to updating the svds tests.

For point #3, Octave already does one check at configure time on the ARPACK
library.  See the file m4/acinclude.m4 and the macro
OCTAVE_CHECK_LIB_ARPACK_OK.  Other tests could be added here, although we
prefer to check behavior rather than version numbers.


dnl
dnl Check whether ARPACK works (does not crash).
dnl
dnl Using a pure Fortran program doesn't seem to crash when linked
dnl with the buggy ARPACK library but the C++ program does.  Maybe it
dnl is the memory allocation that exposes the bug and using statically
dnl allocated arrays in Fortran does not?
dnl
dnl FIXME: it would be nice to avoid the duplication of F77 macros
dnl and typedefs here and in the f77-fcn.h header file.
dnl
AC_DEFUN([OCTAVE_CHECK_LIB_ARPACK_OK], [




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