Error compiling gtk+-971201

[Scott Dybiec <sdybiec humanfactor com>]

I have successfully compiled the last 3 GTK versions, but get the
following error with the gtk+-971201 release:

.
.
.
creating testglib
make[2]: Leaving directory `/share/gtk/gtk+-971201/glib'
Making all in gdk
make[2]: Entering directory `/share/gtk/gtk+-971201/gdk'
/bin/sh ../libtool --mode=compile gcc -DHAVE_CONFIG_H -I. -I. -I.. -I..
-I../glib  -I/usr/X11R6/include   -g -O2 -DNDEBUG -c gdk.c
gcc -DHAVE_CONFIG_H -I. -I. -I.. -I.. -I../glib -I/usr/X11R6/include -g
-O2 -DNDEBUG -c -fPIC -DPIC gdk.c
In file included from gdk.h:22,
                 from gdk.c:45:
../gdk/gdktypes.h:22: wchar.h: No such file or directory
In file included from gdk.h:23,
                 from gdk.c:45:
../gdk/gdki18n.h:25: wchar.h: No such file or directory
make[2]: *** [gdk.lo] Error 1
make[2]: Leaving directory `/share/gtk/gtk+-971201/gdk'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/share/gtk/gtk+-971201'
make: *** [all-recursive-am] Error 2

Any thoughts?

$cott