Re: [Mesa3d-dev] libGLw.a vs libMesaGLw.a vs libMesaGLwM.a?

[Brian P. <br...@va...>]

"Marcelo E. Magallon" wrote:
> 
> Hi,
> 
>  I was updating the Debian package for Mesa and I want to make sure I'm
>  not going to mess up things.  In Debian there are several Mesa packages
>  available: the ones from the mesa source (the "regular" mesa, a glide2
>  package, a ggi package, plus a development package) and the ones coming
>  from the XFree86 sources (the "regular" mesa, xlibmesa3[1], a
>  development package, xlibmesa-dev, and a OSMesa package).  The 3.2
>  packages still have some libMesaGL -> libGL symlinks which I'm going to
>  remove in the 3.4 package (or 3.4.1).  What I'm not sure what to do
>  with is the libMesaGLw library.  The xlibmesa-dev package provides
>  libGLw.a, which contains the following symbol definitions:
> 
>     GLwDrawingAreaMakeCurrent
>     GLwDrawingAreaSwapBuffers
>     glwDrawingAreaClassRec
>     glwDrawingAreaWidgetClass
>     glwMDrawingAreaClassRec
>     glwM1DrawingAreaWidgetClass
>     glwM2DrawingAreaWidgetClass
>     GLwCreateM1DrawingArea
>     GLwCreateM2DrawingArea
>     glwMDrawingAreaClassRec
> 
>  which is slightly different from what's generated using the sources in
>  widgets-mesa.
> 
>  The other difference is the name of the library itself.  mesa generates
>  libMesaGLw and libMesaGLwM, depending if the Motif version of the
>  widgets is enabled or not.  This library also provides the "mesa"
>  functions (e.g., mesaDrawingAreaClassRec).
> 
>  My problem with all of this is that the the "xfree86" packages provide
>  libGLw.a as part of the aforementioned xlibmesa-dev package, which
>  means the mesag-dev[2] package has to provide this file in some
>  (compatible) way.
> 
>  One possible solution for me is to just ask the XFree86 maintainer to
>  split the widgets out of the xlibmesa packages and don't use the ones
>  provided by the mesa source.  The other one is to ask you guys to use
>  the SI source for the widgets.  Yet another one is to do that myself
>  (but I'm not too fond of that idea).  Another one is the included
>  patch, which only modifies the widgets-mesa/src/Makefile in order to
>  generate a libGLw.a library which has the same stuff as the "xfree86"
>  library (modulo the Motif 1/Motif 2 functions).  Please note the motif
>  library is still called libGLwM.a.
> 
>  Thank you in advance for your input,

I'd forget about widgets-mesa.  The one special thing it has is
better colormap/visual selection code for when you're running on
an 8-bit display.  It tries to avoid colormap flashing.  Few people
run 3D apps at 8bpp nowadays.

The widgets-sgi directory has the SGI-authored widgets and is
probably the better code to promote.

-Brian