[Mesa-dev] Split libGLU into its own repository?

[Matt Turner]

On Wed, Aug 29, 2012 at 6:57 AM, Brian Paul <brianp at vmware.com> wrote:
> On 08/27/2012 03:58 PM, Matt Turner wrote:
>>
>> On Sun, Jan 22, 2012 at 4:03 AM, Kenneth Graunke<kenneth at whitecape.org>
>> wrote:
>>>
>>> A while back, we split off GLw into a separate repository.  The rationale
>>> was that GLw should be maintained and released independently from
>>> Mesa/Gallium since it hardly ever changes and isn't closely tied to the
>>> core
>>> GL and drivers.
>>>
>>> I'd like to do the same for libGLU.  I've split it out, created an new
>>> autotools build system, and uploaded a repository here:
>>>
>>> git://people.freedesktop.org/~kwg/glu
>>>
>>> It has all the history except for some old build system vestiges, which
>>> filter-branch ate when I moved files from src/glu to the top-level
>>> directory.  I doubt anyone cares about those, since you obviously
>>> couldn't
>>> use the old build system anyway.
>>>
>>> I made the installed library libGLU.so.1.3.1, as this ought to be
>>> compatible
>>> with existing binaries.
>>>
>>> If this sounds good to everyone, we can create an official /mesa/glu repo
>>> and I can go ahead and remove it from the Mesa tree.  We'll also want to
>>> cut
>>> a glu release (though it could possibly wait until Mesa 8.1.)
>>>
>>> One concern I have is that libGLU in Mesa appears to have some build
>>> system
>>> magic for linking against OSMesa instead of libGL.  With the new system,
>>> I
>>> think you would need "pkg-config --libs --cflags gl" to report OSMesa.
>>> I'm
>>> not sure whether that's an issue or not.
>>
>>
>> I've now picked this back up. It's available in
>> http://cgit.freedesktop.org/~mattst88/glu/
>>
>> I've addressed Jakob's comment about putting the src/ folder back in,
>> and I've confirmed that it passes distcheck.
>>
>> I'll bump the package version to 9.0 (to correspond to Mesa-9.0 -- the
>> first version of Mesa that won't have bundled GLU) but the soname is
>> still 1.3.x to match previous versions. OSMesa linkage should work,
>> but I haven't touched the name mangling stuff. Tom (CC'd), if you care
>> about this...
>>
>> I'll send a patch to strip GLU out of Mesa once we get this into its
>> own /mesa/glu/ repository.
>>
>> Please review and then move to /mesa/glu/.
>
>
> I cloned your repo and gave it a try.  Seemed to compile fine. However, once
> in a while I need to debug something in libGLU so compiling with -g and
> w/out -O2 is important.
>
> I did ./configure CFLAGS=-g CXXFLAGS=-g and noticed that the C++ sources are
> still compiled with -O2 (which messes up gdb).  Can that be fixed?
>
> Ideally, we'd have a --enable-debug flag that would set -g and omit -O2.
>
> -Brian

Cool, thanks a lot for checking it out. I pushed a patch that adds an
--enable-debug configure option which appends -g -O0 to CFLAGS and
CXXFLAGS, which will override the default -O2 flags. Let me know if
you see anything else that can be improved.

Thanks!
Matt