[Octave-bug-tracker] [bug #59206] crash during matrix multiplication (Win only)

[Markus Mützel]

Update of bug #59206 (project octave):

                  Status:               Confirmed => Patch Submitted        

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Follow-up Comment #27:

I used the attached patch to cross-compile version 0.3.12 of OpenBLAS with the
additional settings for TARGET and NUM_THREADS.
With that patch, TARGET will be set to "KATMAI" when we are building for
Windows 32bit. Otherwise, it will be set to "PRESCOTT". This assumes that all
other targets (incl. native Linux) are 64bit. I don't know if this assumption
is save enough.
It will set NUM_THREADS to 24 (which I thought was reasonably high).

One hunk from a patch we have in MXE Octave (referring to xerbla) no longer
applies. I just removed that hunk and compilation went smoothly. I'm not sure
if this is ok or if we need an alternative change.

Anyway, on Windows, I used the "BLAS Switcher" to select OpenBLAS. Running
`version -blas` confirmed that OpenBLAS was used.
With that, I ran the test suite.
I had some local changes in Octave. Because of those, some tests failed. But
these test failures seem unrelated.
Also the code from comment #7 didn't crash Octave. (But it never did when MXE
Octave was compiled on the same machine.)
So, I guess OpenBLAS works correctly for me with this change.

(file #50139)
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Additional Item Attachment:

File name: bug59206_openblas_0.3.12.patch Size:3 KB
   
<https://file.savannah.gnu.org/file/bug59206_openblas_0.3.12.patch?file_id=50139>



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