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[Alan G I. <ai...@am...>]

> On Wednesday 14 December 2005 1:28 am, Peter Verveer wrote: 
> Sofar I have been very comfortable to make my package 
> available under the license that is used by numarray. The 
> same would be true for a scipy_core/scipy version. 
> However, for a general C package that could have a much 
> broader audience in the same way, I feel different. 
> I would most likely release such a package using the GPL. 
> In addition, that would allow me to  use other GPL 
> licensed software such as GSL with it. 

"Use with" means many things.

You write it, you choose the license, of course.

But as an academic user/observer, rather than a substantial  
contributor, I have noticed that if your goal is to see your 
code used and improved, it is not clear that the GPL is the 
best way to pursue that goal.  See e.g. the history of 
Matplotlib and MayaVi.  (Or Python itself, for that matter, 
for a larger example.)  Each case is individual, of course.  
If you need extant GPL code to be an *integral* part of your 
code, that makes the GPL natural.

fwiw,
Alan