Re: [PATCH] gnu: Add opencascade-oce

[Marius Bakke <mbakke@fastmail.com>]

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Paul Garlick <pgarlick@tourbillion-technology.com> writes:

> Hello Marius,
> Thank you for your review.
>> I wonder if this could fit in "engineering.scm". Or maybe
>> "geometry.scm"
>> or "3d.scm". We try to avoid "single program" modules. What do you
>> think?
> Perhaps maths.scm is the best place, in order to avoid creating a new
> module.  The Gmsh package is already there.

OK, sounds good!

>  To check; am I right in
> saying that a library in one module can be used as an input for a
> package in another module?  For example, if FreeCAD were to be
> packaged, and placed in engineering.scm, could it use opencascade-oce
> as an input from maths.scm?

That's the intended usage; cross-references are OK too (to an extent).

>> > +(define-public opencascade-oce
>> > +  (package
>> > +    (name "opencascade-oce")
>> > +    (version "0.17.2")
>> 
>> Version 0.18 was released a few days ago!
>
> It would be useful to package both versions.  There is a difference in
> the OpenGL graphics card requirements in going from version 0.17.2 to
> 0.18.

That sounds sensible. Could you try packaging both versions and add a
comment with 0.17 mentioning the graphics card requirement? See e.g.
'python-requests-2.7' for an example of inheriting another package.

>> > 
>> > +    (license license:lgpl2.1))) ; plus header files exception
>> > 
>
>> 
>> 
>> Please expand on the exception comment and mention
>> OCCT_LGPL_EXCEPTION.txt. There are also some public domain files, and
>> the bundled "gtest" is bsd-3. src/OpenGl/OpenGl_glext.h is distributed
>> under the expat license. Some files generated by "bison" has GPL3+.
>> 
>
> I have added the information about the expat and BSD-3 licenses.  Can
> you elaborate on the public domain files and Bison?

At least these two files are public domain:

src/Standard/Standard_StdAllocator.hxx
src/NCollection/NCollection_StdAllocator.hxx

Reading the bison generated files more closely, they contain an
exception saying they can be relicensed as part of a larger work, so I
think they fall under the "main" license in this case. Sorry for the
confusion!

Otherwise the patch looks good. I did notice that some of the inputs are
not referenced as verified with `guix gc -R /gnu/store/...`. Perhaps
they need some configure switches to be enabled? These inputs appear to
be unused, or only needed for building:

ftgl
qt
libtool
file
tk
tcl

Libtool and file should likely be native-inputs, not sure about the
others. Could you check whether they are required and send an updated
patch?

Thanks in advance! This is the final round, promise ;-)

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