Re: gnuplot numerical errors on Intel MacBook

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

Hans-Bernhard Br=F6ker wrote:
> Daniel J Sebald wrote:
>=20
>=20
>>Hmm, that would suggest to me a problem with the exterior gamma
>>function.  (We should get rid of these warnings though as a first
>>step.) =20
>=20
>=20
> No.  Those warnings are harmless --- they occur for basically all
> functions tested by ./configure that turn out to be GCC built-in functi=
ons.
>=20
> The most likely reason for this problem is signgam, the extra variable=20
> used by gamma() to report the sign of its result (since the main result=
=20
> is the logarithmized gamma value, it can't carry the sign).  This is=20
> quite notorious for being absent; or present but not declared in any he=
ader.
>=20
> In case of doubt, you may have to use autoconf's mechanisms for forcing
> the results of the gamma() and lgamma() tests to "no" (or edit config.h=
=20
> before running 'make').

Then if C runs the 'prob.dem' demo, it should be inverted.  (Is that what=
 you are seeing for that demo?)

Dan