If removing the GLXContextID typedef from glx.h works for you, feel free to submit a patch.

GLXContextID isn't actually used anywhere else in glx.h

commit 136a12ac98868d82c2ae9fcc80d11044a7ec56d1
Author: Vinson Lee <vlee@freedesktop.org>
Date:   Fri Oct 18 17:40:40 2013 -0700

    mesa: Remove GLXContextID typedef from glx.h.
    
    Fixes this build error.
    
      CC     clientattrib.lo
    In file included from ../../include/GL/glx.h:333,
                     from glxclient.h:45,
                     from clientattrib.c:32:
    ../../include/GL/glxext.h:275: error: redefinition of typedef ‘GLXContextID’
    ../../include/GL/glx.h:171: note: previous declaration of ‘GLXContextID’ was here
    
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=70591
    Signed-off-by: Vinson Lee <vlee@freedesktop.org>

Applications such as Allergo rely on this typedef existing in glx.h, and removing it apparently breaks their application's build.

Mesa builds fine without Vinson's patch for me, using GCC on Linux, so for now I've gone ahead and reverted it from master.

The typedef is really part of GLX proper, and not an extension, so it seems like it belongs in glx.h with the others, not glxext.h.

I'm reopening this bug because presumably Vinson's issue is back.  Hopefully we can come up with another solution.

mesa: 5a51c1b01a16d3256f9769a76d8293fea5853b1f (master)

The build error appears to be compiler dependent. I can reproduce the build error with gcc 4.4 or clang 2.8 on CentOS 6. I can also reproduce the build error with gcc-4.4, but not with gcc 4.8, on Ubuntu 13.10.

$ ./autogen.sh --disable-dri3 --with-dri-drivers=swrast --with-gallium-drivers=
$ make
  CC     clientattrib.lo
In file included from ../../include/GL/glx.h:333,
                 from glxclient.h:45,
                 from clientattrib.c:32:
../../include/GL/glxext.h:275: error: redefinition of typedef ‘GLXContextID’
../../include/GL/glx.h:171: note: previous declaration of ‘GLXContextID’ was here

glxext.h shouldn't have grown the new typedef.  I've opened https://cvs.khronos.org/bugzilla/show_bug.cgi?id=11454 for this.

commit f8432832a7f3d3cc01f8bab8358069029d575ef0
Author: Vinson Lee <vlee@freedesktop.org>
Date:   Mon Jan 6 12:09:29 2014 -0800

    mesa: Remove GLXContextID typedef from glxext.h.
    
    This patch fixes this build error with gcc <= 4.5 and clang <= 3.1.
    
      CC     clientattrib.lo
    In file included from ../../include/GL/glx.h:333:0,
                     from glxclient.h:45,
                     from clientattrib.c:32:
    ../../include/GL/glxext.h:275:13: error: redefinition of typedef 'GLXContextID'
    ../../include/GL/glx.h:171:13: note: previous declaration of 'GLXContextID' was here
    
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=70591
    Signed-off-by: Vinson Lee <vlee@freedesktop.org>
    Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>