Re: readline to gnuplot.exe (console mode) for windows

[Tatsuro M. <tma...@ya...>]

Hello Tait and Ethan


--- Ethan Merritt wrote:

> On Sunday 21 February 2010, Tait wrote:
> > 
> > No complaint if you want to do this privately, but for distribution, are
> > we allowed to link against readline?
> 
> Good point.  I had momentarily forgotten that the windows version would
> be provided as a binary image rather than as source.
> 
> > Gnuplot is not GPL-licensed (and
> > personally I prefer it that way), and as I just became aware the other
> > day, it's apparently the FSF's position that linking against readline is
> > NOT allowed from non-GPLv3 applications.
> 
> I happen to disagree with them about that. I do not believe that linking
> to an optional external dynamic library by itself creates a derived work,
> hence the GPL restrictions are not relevant.  But it's a fight we don't
> need to pick, so let's not. 
> 
> 	Ethan
> 

Thank you for point the licensing issue about the GPL.

That is not related to only to the readline  and serioys problem for binary distribution for windows
related one.

Pango, freetype, and libiconv are under the GPL (but version is 2nd not GPL v3).

For wxt terminal, the mingw libraries are linked. And it does not work without mingwm10.dll.

The libiconv perhaps is be able not to use it.  Others are hard to remove them.


If the binaries link with the GPL software cannot be allowed, we cannot distribute any windows
binaries with recent and new features (the cairo related terminal and the wxt terminal).  The people
would like to use these feature, they have to build the gnuplot by themselves. 

I have read the GPL licence (Sorry I have read the GPL v2 because I cannot figure out the
corresponding part in the GPL v3).  The license of libraries are different from the that of the GPL'ed
software itself.

The cygwin binaries that shipped on the gnuplot site (and also on my site) seems to have been linked
with the libreadline.

Perhaps the license issue is very important.  I think that more discussions are required but not
simply stop to link with GPL'ed libraries.  

Regards

Tatsuro

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