Re: "Official" binary release for Windows

[PhilipNienhuis]

John W. Eaton wrote
> On 03/07/2014 07:10 PM, John Donoghue wrote:
>> On 03/07/2014 06:08 PM, 

> octave-maintainers-request@

>  wrote:
>>> Message: 3
>>> Date: Fri, 07 Mar 2014 17:21:01 -0500
>>> From: "John W. Eaton"<

> jwe@

> >
>>> To: octave maintainers mailing list<

> maintainers@

> >
>>> Subject: "Official" binary release for Windows
>>> Message-ID:<

> 531A464D.90905@

>>
>>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>>
>>> I'd like to start making the Windows installer available from
>>> ftp.gnu.org.  Is it ready for that now?  Or are there some significant
>>> problems that need to be fixed before we should make "official"
>>> releases?
>>>
>>> jwe
>>
>> I havent had any issues recently with the build except with gcc.
>>
>> I had added a readme html file for the install that may want to be
>> looked at / modified prior to distribution, depending on what is
>> distributed or not.
>>
>> Would it also make sense to list in it all the packages that are known
>> to work and compile in windows ?
> 
> Sure.
> 
> Is there any good reason that openblas should not be used by default?

(I don't remember if I have reported this already. Apologies if this is a
duplicate)

OpenBLAS doesn't work well on (some?) Intel Core i3 processors (at least not
on Windows). 
The initial cmd32 window (the one that disappears after a while during start
of Octave) shows three OpenBLAS errors, apparently about some missing CPU
instructions (IIRC something with "VAXD" or "VAXXD"). 
I saw this on a colleague's laptop, I haven't been able to check it out
further as he works in another branch office.

In the latest binary Octave-for-Windows installer versions there's an option
for choosing either the reference BLAS or OpenBLAS; so OpenBLAS problems can
be avoided. 
Perhaps the installer screen where the BLAS version can be selected could
show a warning that OpenBLAS may not work reliably on all CPUs.

Philip




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