0. Before starting trying to build an X server with OpenGL extension,
   we must have had a X consortium X11R6 build tree.

1. Unzip/untar the OpenGL distribution into your X consortium
   X11R6 build tree. The distribution extracts into the following
   directory hierarchy:

    xc                              Additions to XFree86 source tree
    xc/doc                          Man pages and specifications
    xc/include/GL                   Client header files
    xc/lib/GL                       Client library source code
    xc/programs/Xserver/include/GL  Server header files
    xc/programs/Xserver/GL          Server source code
    xc/programs/Xserver/GL/opengl   Server OpenGL renderer

2. Set $XTOPDIR must point to the top of the X tree.

3. Edit the file $XTOPDIR/xc/config/cf/host.def for parts to be built.

    #define GlxModule NO
    #define BuildGlxExt YES
    #define GlxStaticServerLib GL/libdixGL.a GL/opengl/libGLcore.a
    #define GlxStaticServerDir GL

   Building the GLw widget requires Motif. It is disabled by default.
   If you have Motif installed:

    #define BuildGlw YES

4. Make the following change to $XTOPDIR/xc/programs/Xserver/Imakefile.
   This will cause the server GLX library to be built when BuildGlxExt
   is defined and the non-stub Glx library is being built:

    <         GLXDIR =
    ---
    >         GLXDIR = GlxStaticServerDir

5. Make the following change to $XTOPDIR/xc/lib/Imakefile. This will
   cause the client GLX library to be built when BuildGlxExt is defined.

    > #if BuildGlxExt
    > GLXLIBDIR = GL
    > #endif

    < SUBDIRS = $(BERKDIR) xtrans $(LINTSUBDIRS) $(FONTSUBDIR)
    ---
    > SUBDIRS = $(BERKDIR) xtrans $(LINTSUBDIRS) $(FONTSUBDIR) $(GLXLIBDIR)

8) You should be able to build the server and client libraries
   normally at this point by descending to $XTOPDIR/xc and 'make World'.

9) The conformance tests and sample programs are not built by 'make World'.
   You can build them as follows:

    % cd $XTOPDIR/xc/test/GL/conform
    % imake -I$XTOPDIR/xc/config/cf -DTOPDIR=$XTOPDIR/xc
    % make Makefiles
    % make

    % cd $XTOPDIR/xc/contrib/GL
    % imake -I$XTOPDIR/xc/config/cf -DTOPDIR=$XTOPDIR/xc
    % make Makefiles
    % make