Bugzilla Bug 112431

Maxima's plot3d() function requires gnuplot, which isn't pulled in along with 
the main ebuild by default. A dependency (or useflag+compile options?) on 
gnuplot should therefore be added.

Reproducible: Always
Steps to Reproduce:
1. plot3d([cos(y)*(10.0+6*cos(x)), sin(y)*(10.0+6*cos(x)), -6*sin(x)], [x,0,2*%
pi],[y,0,2*%pi], ['grid,20,20]);
Actual Results:  
/bin/bash: gnuplot: command not found

Expected Results:  
A plot.

This bug was corrected in the later ebuild revisions of maxima, unfortunately
not stable yet.

Since the fixed versions were not even in testing for some supported arches, I
backported the fix. Thanks for the notice.