Re: [Octave 5.2.0 @ Ubuntu 20.04] Long duration of complex matrix inverse

[Thomas D. Dean]

On 2020-03-29 15:13, Thomas D. Dean wrote:

I installed OpenBlas in /usr/local/lib/OpenBlas.

Octave configure returned "64 bit blas index = no"

I used
../configure --with-blas=/usr/local/lib/OpenBlas/lib/libopenblas.so

Does this use the include files in  /usr/local/lib/OpenBlas/include?  I 
fear that configure will use the ubuntu package installed include files.

I have related packages installed:
>dpkg -l libatlas* liblapack* libblas*
Desired=Unknown/Install/Remove/Purge/Hold
| 
Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version      Architecture Description
+++-==============-============-============-==================================
un  libatlas-base- <none>       <none>       (no description available)
un  libatlas3-base <none>       <none>       (no description available)
ii  libblas-dev:am 3.7.1-4ubunt amd64 Basic Linear Algebra Subroutines 3
un  libblas.so     <none>       <none>       (no description available)
un  libblas.so.3   <none>       <none>       (no description available)
ii  libblas3:amd64 3.7.1-4ubunt amd64 Basic Linear Algebra Reference imp
ii  liblapack-dev: 3.7.1-4ubunt amd64 Library of linear algebra routines
un  liblapack-doc  <none>       <none>       (no description available)
un  liblapack.so   <none>       <none>       (no description available)
un  liblapack.so.3 <none>       <none>       (no description available)
ii  liblapack3:amd 3.7.1-4ubunt amd64 Library of linear algebra routines

I hesitate to remove/purge the 'un' packages.

I have changed from Sun to aix to BSD to FreeBSD to debian to ubuntu, 
fleeing automated system changes.

Tom Dean