Log message:
As suggested by Ron Roskens in PR pkg/23489 (closing that PR):
use si-glu sources to build a libGLU that includes GLU Polygon Tessellator
functions and use this new functionality in MesaDemos.

Bump PKGREVISIONs.

Log message:
Finally update Mesa and friends after the distfile changed on the website
without a version bump.  Changes made, according to the website, for
libtool/autofoo fixes.

Some changes from Ron Roskens:
glut depends upon graphics/glu (otherwise its linked against X11R6 libs)

MesaDemos:
 rather than using the pre-built distribution makefiles,
 use the automake/configure built makefiles which have
 the build dependencies all setup.

This closes PR pkg/23476.

Log message:
Patch Mesa's Makefile to use '-fno-strict-aliasing' rather than '-fstrict-aliasing',
as the code contains unsafe use of aliased pointers.
As suggested by tls@ in PR pkg/23381, closing said PR.

Log message:
Update Mesa and friends to latest version 5.0.2:

- fixed texgen problem causing texcoord's Q to be zero (stex3d)
- default GL_TEXTURE_COMPARE_MODE_ARB was wrong
- GL_CURRENT_MATRIX_NV query was wrong
- GL_CURRENT_MATRIX_STACK_DEPTH_NV query was off by one
- GL_LIST_MODE query wasn't correct
- GL_FOG_COORDINATE_SOURCE_EXT query wasn't supported
- GL_SECONDARY_COLOR_ARRAY_SIZE_EXT query returned wrong value
- blended, wide lines didn't always work correctly
- glVertexAttrib4svNV w component was always 1
- fixed bug in GL_IBM_rasterpos_clip (missing return)
- GL_DEPTH_TEXTURE_MODE = GL_ALPHA didn't work correctly
- a few Solaris compilation fixes
- fixed glClear() problem for DRI drivers (non-existant stencil, etc)
- fixed int/REAL mixup in GLU NURBS curve evaluator (Eric Cazeaux)
- fixed delete [] bug in SI GLU (bug 721765) (Diego Santa Cruz)
- glFog() didn't clamp fog colors
- fixed bad float/int conversion for GL_TEXTURE_PRIORITY in the
  gl[Get]TexParameteri[v] functions
  - fixed invalid memory references in glTexGen functions (bug 781602)
  - integer-valued color arrays weren't handled correctly
- glDrawPixels(GL_DEPTH_COMPONENT) with glPixelZoom didn't work
- GL_EXT_texture_lod_bias is part of 1.4, overlooked in 5.0.1
- build GLUT with -fexceptions so C++ apps propogate exceptions

While here, fix PR pkg/23003 by moving the version number to version.mk
and including that in the buildlink.

Log message:
Specify the category when including other files and when depending on other
packages.  From PR pkg/21864 by ccatrian at eml.cc.

Log message:
Finally remove support of Mesa 3.4.1 completely as discussed at length
on tech-pkg@ at various times.  This means that regardless of what kind of
GL support comes with X11, if a package depends on GL, Mesa 5.0.1 (or higher)
will be installed into ${LOCALBASE}.

Some troubleshooting after the latest patches by Krister Walfridsson.

Log message:
kill leading whitespace, remove comment about license (we already
track licenses, and it's GPL'd anyway).

Log message:
s/netbsd.org/NetBSD.org/

Log message:
regen (patch-aa mismatch, jan?). Closes PR 22152.

Log message:
Hopefully finally get this right:
Default Mesa Version should be 3.4.2, so that people who don't care and have
GL in XF don't need to build the whole thing.  If MESA_REQD is set to 5.0.1
(as, for example, by MesaDemos), require version 5.0.1 of MesaLib, gl* etc.

If libGL.so.5 is found to be present on the system, force MESA_REQD to be
5.0.1 to avoid accidental downgrades if MESA_REQD was not specified before-
hand.

Changes reviewed by tron@ (thanks!).