Pkg-Config
Glib 2.0+ library/headers (devel package) (http://www.gtk.org)
libxml2 2.0+ library/headers (devel package)
+libGL library/headers (devel package, mesa or otherwise)
Optionally, if you want to build the configuration tool (this is recommended):
GTK+ 2.0+ library/headers (devel package) (http://www.gtk.org)
+----
+In debian unstable, you want these packages:
+gcc
+gettext
+automake1.7
+autoconf
+libtool
+bison
+flex
+libxft2-dev
+pkg-config
+libglib2.0-dev
+libxml2-dev
+xlibmesa-dev
+
+tip: run "update-alternatives --config automake" and select automake1.7 before
+ running ./configure
+
----