Upstream: http://code.google.com/p/vmware-view-open-client/issues/detail?id=84

diff -Naur VMware-view-open-client-source-4.5.0-297975/configure.ac VMware-view-open-client-source-4.5.0-297975.new/configure.ac
--- VMware-view-open-client-source-4.5.0-297975/configure.ac	2010-09-10 22:09:17.000000000 +0200
+++ VMware-view-open-client-source-4.5.0-297975.new/configure.ac	2011-06-01 16:58:57.145105019 +0200
@@ -140,7 +140,7 @@
    PKG_PROG_PKG_CONFIG
    PKG_CHECK_MODULES(GLIB, [glib-2.0 >= 2.6.0 gmodule-2.0 >= 2.6.0])
    if test "$use_gtk" = "yes" ; then
-      PKG_CHECK_MODULES(GTK, [gtk+-2.0 >= 2.4.0])
+      PKG_CHECK_MODULES(GTK, [gtk+-2.0 >= 2.4.0 x11])
    fi
    PKG_CHECK_MODULES(XML, [libxml-2.0 >= 2.6.0])
    PKG_CHECK_MODULES(CURL, [libcurl >= 7.16.0])