[Envoy] Won't configure

[Discussion of the Envoy file-associations library.]

Greetings to all, and happy holidays!

I have an interesting problem.  As a newbie to Envoy, I'm not sure what 
to do.  Here is my terminal program response to ./configure.  It went on 
for a couple screens and then displayed:

checking for unistd.h... (cached) yes
checking for sqlite3_open in -lsqlite3... yes
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for XmCreatePushButton in -lXm... no
checking for X11... yes
checking for XT... yes
checking for gtk_init in -lgtk... no
checking for GTK... yes
configure: error: No GUI library found!
See `config.log' for more details.


I don't see anything in config.log that explains anything.  I have no 
idea what GUI library is needed or where to find it.  (Dumb error message.)

I am using Mandriva 2007.1 and everything seems to be installed for GTK, 
as well as for every other environment.  I'm at a loss.

Any help anyone can give would be appreciated.

Thanks.

KitchM