[PD-dev] Pd-cvs Digest, Vol 92, Issue 2

[Hans-Christoph Steiner]

For what its worth, the past couple Pd-extended releases on Mac OS X
have included the -fast flag, which does enable -ffast-math.  I've never
heard any complaints, but I've also never tested it closely.

https://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man1/gcc.1.html

This would be a great use case for Katja's test framework in
externals/testtools.  Just write the tests using that framework, and I
can set them to run on GNU/Linux i386 and amd64, and Mac OS X
i386/x86_64/powerpc.

Also, I have access to the Debian developer machines, so I could test
them on any of those.

.hc

On 10/03/2012 11:28 AM, Miller Puckette wrote:
> I have to think about thi one a little...  nobody could ever test -fastmath
> for all architectures.  The danger I see is that some externals might
> break.  Maybe I should just leve it on during the 0.44 test phase and hope
> I hear back if it's breaking things :)
>
> The reason for putting it in is that I stil get situations where Pd grinds
> to a halt handling underflow interrupts - it's now a problem on the Pi.
>
> cheers
> Millerhttps://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man1/gcc.1.htm
>
> On Wed, Oct 03, 2012 at 03:16:22PM +0100, Claude Heiland-Allen wrote:
>> On 03/10/12 11:00, pd-cvs-request at iem.at wrote:
>>>     add -ffast-math flag to CC lines for linus and Mac
>> Have you checked that this is safe on all architectures?
>>
>> IIRC, it optimizes with the assumption that everything is finite and
>> not NaN, among other things.
>>
>> I know when I wrote 'tilde' (compiler from Pd dsp to C++), which
>> incidentally used 'double' all the way through, I couldn't always
>> use -ffast-math because it broke some patches very audibly.  I
>> didn't have time to debug the issue, so I just removed the flag
>> globally.
>>
>> https://gitorious.org/maximus/tilde
>> (currently unmaintained / dormant, but might still work)
>>
>>
>> Claude
>> -- 
>> http://mathr.co.uk
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