Why does configure search for the gnome_xml parser?
The WML compiler in Kannel uses the gnome_xml parser to validate the wml content. You have to install both the normal and the development libxml package. You can download the libxml packages from: ftp://rpmfind.net/pub/libxml/ or install it with apt-get install libxml2-dev libxml2 in Debian. See Kannel requirements page for information on what libxml version to use.