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

[Daniel J S. <dan...@ie...>]

Hans-Bernhard Br=F6ker wrote:
> Daniel J Sebald wrote:
>=20
>> I guess it doesn't pay to understand what it is beyond the fact we
>> know gamma() =3D tgamma() on your system.
>=20
>=20
> Except that we don't actually know that.  And even if we knew it, it=20
> wouldn't matter, because gnuplot doesn't use gamma() on a system that,
> like Chris', also has lgamma().  See specfun.c, line 91 ff.
>=20
> I.e. the actual bug is independent of what gamma() does on MacOS,=20
> because gnuplot isn't calling gamma().  We call lgamma(), and the bug i=
s=20
> that signgam is garbage.

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.  So perhaps it has no meaning =
anymore for Apple's platform.  Why they would still have the variable in =
the library if that were the case, I'm not sure.

Dan