Re: [Fwd: Re: gnuplot numerical errors on Intel MacBook]

[CM <mon...@gm...>]

I have verified that the latest patch, the one that does everything at
configuration time, works on my Intel MacBook Pro.

Thanks, Daniel!

+1

- C

On 9/28/06, Daniel J Sebald <dan...@ie...> wrote:
>
> Hans-Bernhard Br=F6ker wrote:
> > Daniel J Sebald wrote:
> >
> >
> >>Probably so.  If this is the most up-to-date documentation:
> >
> >
> >>
> http://developer.apple.com/documentation/Darwin/Reference/ManPages/man3/l=
gamma.3.html
> >
> >
> >>there is no mention of a variable signgam.
> >
> >
> > And that's a solid bug in any OS math library that purports to implemen=
t
> > C99 or any recent level of Unix standard compliance.  lgamma() is
> > required to be there, and it's equally required to have a signgam to go
> > with it.
> >
> >  > So perhaps it has no meaning anymore for Apple's platform.
> >
> > That's not Appple's decision to make.
> >
> >  > Why they would still have the variable in
> >
> >>the library if that were the case, I'm not sure.
> >
> >
> > They must have it, and they must use it as defined in all applicable
> > standards.
>
> Well, thanks for pointing out the standard, didn't know there was a C99
> standard.  However, if this is the standard documentation at:
>
> http://www.open-std.org/JTC1/SC22/WG14/www/standards
>
> under WG14 N1124 (it's a PDF file), then I don't immediately see any
> indication that lgamma() requires there be an associated signgam
> variable.  In fact, there is no such signgam in the document anywhere.  T=
he
> documentation appears just as listed on the apple websight.
>
> There isn't even a gamma() function in C99.  I'm guessing the concept is
> to move away from signgam, I believe, for which the non-threadedness may
> have played a factor in their decision.
>
> So, that first patch I have on SourceForge is the C99 version (just tgamm=
a
> or lgamma).  The second patch is the "alright, we'll be nice to all you
> behind the curve computer users out there" (which is probably somewhere n=
ear
> 99.73%) version.
>
> Dan
>



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