Re: Seqfault with single complex matrices on Mac

[Ben Abbott]

> On Apr 6, 2016, at 07:43, Sebastian <address@hidden> wrote:
> 
> 
>>> Am 06.04.2016 um 13:36 schrieb Ben Abbott <address@hidden>:
>>> 
>>> On Apr 6, 2016, at 2:42 AM, Sebastian Schöps <address@hidden> wrote:
>>> 
>>> Dear all, 
>>> 
>>> there must be a change from 4.0.0 to 4.0.1 that leads to crashes on Mac OS
>>> using clang and Apple's BLAS lib. For example single complex matrices are
>>> affected, e.g.
>>> 
>>> single ([1+i 2+i 3+i]) * single ([ 4+i ; 5+i ; 6+i])
>>> 
>>> segfaults octave. Since the problem was not present in 4.0.0, maybe someone
>>> has an idea? If not, I would have to start bisecting, but this will take
>>> forever...
>>> 
>>> Thanks, 
>>> Sebastian
>> 
>> This works for me on both the default and stable branches.
>> 
>> clang --version
>> Apple LLVM version 7.0.2 (clang-700.1.81)
>> Target: x86_64-apple-darwin14.5.0
>> Thread model: posix
> 
> Thanks for helping. Do you use openblas or Apple's implementation via 
> vecLibFort, [1]? My problems occur only in the latter case, i.e., it works 
> perfectly with openblas.
> 
> I have currently no clue what's going on. The problem might be restricted to 
> homebrew. Nonetheless, on my mac (10.11) octave 4.0.0 works while octave 
> 4.0.1 segfaults. Since all other settings are identical some change in Octave 
> should be causing the trouble.
> 
> Sebastian
> 
> [1] https://github.com/mcg1969/vecLibFort

Veclib had a lot of bugs. You can try a "make check" to get an impression. I'm 
not in front of my computer, and don't remember which blas/ lapack I'm using, 
but it's neither one of those.