problems with imlib and autogen.sh

[Juergen Fiedler <juergen quotus com>]

After some days of trying, I managed to compile gtk+. Next, I should do
imlib (I guess). Now, if I try to run './autogen.sh --prefix=/usr/gnome
--with-gtk-prefix=/usr/gnome', I get the following errors:

>-------SNIP-------<
aclocal: configure.in: 22: macro `AM_PATH_GTK' not found in library
utils/Makefile.am:90: variable `GTK_LIBS' not defined
utils/Makefile.am:90: variable `GTK_LIBS' not defined
./configure: syntax error near unexpected token
`AM_CONFIG_HEADER(config.h)'
./configure: ./configure: line 540: `AM_CONFIG_HEADER(config.h)'
>-------SNIP-------<

Seems that there are some definitions missing. Does anybody have any
idea what could have gone wrong?

TIA,
Juergen