Dieter wrote:
> Binary pkg Xrender-0.8.3nb1 contains the file
> include/X11/extensions/Xrender.h
> which contains the line
> #include <X11/extensions/render.h>
> 
> The file render.h is nowhere to be found.  :-(
> 
[ascent ~]$ pkg_info -f x11-links | grep render.h
         File: share/x11-links/include/X11/extensions/Xrender.h
         File: share/x11-links/include/X11/extensions/render.h
         File: share/x11-links/include/freetype2/freetype/ftrender.h

Try installing x11-links from pkgsrc. Otherwise, if the detection fails, 
send-pr Xrender.

Wouter