cvs gnome-libs compile problem

[Matthew Greenfield <matthewg clear net nz>]

Hi folks :)

Having a problem getting gnome-libs from CVS to compile at the moment. 
It gets through quite a lot of it (well what seems like quite a lot)
then ends up getting stuck with these errors :

make[2]: Entering directory `/usr/src/gnome/gnome-libs/gtk-xmhtml'
/bin/sh ../libtool --mode=compile gcc -DHAVE_CONFIG_H -I. -I. -I.. -I..
-I./.. -I/usr/local/include -I/usr/X11R6/include
-I/usr/local/lib/glib/include -I/usr/local/include -DWITH_GTK -DDEBUG
-DGNOME_LIB -I/usr/X11R6/include -I/usr/local/lib/glib/include
-I/usr/local/include -g -O2 -Wall -Wno-unused -Wmissing-prototypes
-Wmissing-declarations -Wpointer-arith  -c readXPM.c
gcc -DHAVE_CONFIG_H -I. -I. -I.. -I.. -I./.. -I/usr/local/include
-I/usr/X11R6/include -I/usr/local/lib/glib/include -I/usr/local/include
-DWITH_GTK -DDEBUG -DGNOME_LIB -I/usr/X11R6/include
-I/usr/local/lib/glib/include -I/usr/local/include -g -O2 -Wall
-Wno-unused -Wmissing-prototypes -Wmissing-declarations -Wpointer-arith
-Wp,-MD,.deps/readXPM.p -c -fPIC -DPIC readXPM.c
In file included from /usr/include/jpeglib.h:24,
                 from plc.h:107,
                 from readXPM.c:133:
/usr/include/jconfig.h:12: warning: `HAVE_STDLIB_H' redefined
../config.h:233: warning: this is the location of the previous
definition
readXPM.c:136: X11/xpm.h: No such file or directory
make[2]: *** [readXPM.lo] Error 1
make[2]: Leaving directory `/usr/src/gnome/gnome-libs/gtk-xmhtml'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/usr/src/gnome/gnome-libs'
make: *** [all-recursive-am] Error 2

So it seems I'm missing X11/xpm.h ?  I've had a quick look around where
I thought that one might be, and indeed I can't find it..  Where should
I get it from? what is it a part of?  Or am I totally missing the point
here and is it something completely different breaking my compile?

much thanks for any help you can provide :)

Matt