--- configure.in.old	2011-06-22 13:44:43.000000000 +0200
+++ configure.in	2011-06-23 15:12:46.000000000 +0200
@@ -235,14 +235,28 @@
   [],[enable_gtk_theme=yes])
 AC_MSG_RESULT([$enable_gtk_theme])
 
+AC_MSG_CHECKING([which gtk+ version to compile against])
+AC_ARG_WITH([gtk],
+  [AS_HELP_STRING([--with-gtk=2.0|3.0|both],[which gtk+ version to compile against (default: 2.0)])],
+  [case "$with_gtk" in
+     2.0|3.0|both) ;;
+     *) AC_MSG_ERROR([invalid gtk version specified]) ;;
+   esac],
+  [with_gtk=2.0])
+AC_MSG_RESULT([$with_gtk])
+
 have_gtk_2=no
 have_gtk_3=no
 GTK2_BINARY_VERSION=
 GTK3_BINARY_VERSION=
 
 if test "x$enable_gtk_theme" = "xyes" -o "x$enable_pixbuf_loader" = "xyes"; then
-  PKG_CHECK_MODULES([GTK2],[gtk+-2.0 >= $GTK2_REQUIRED],[have_gtk_2=yes],[have_gtk_2=no])
-  PKG_CHECK_MODULES([GTK3],[gtk+-3.0 >= $GTK3_REQUIRED],[have_gtk_3=yes],[have_gtk_3=no])
+case "$with_gtk" in
+  2.0) PKG_CHECK_MODULES([GTK2],[gtk+-2.0 >= $GTK2_REQUIRED],[have_gtk_2=yes],[have_gtk_2=no]);;
+  3.0) PKG_CHECK_MODULES([GTK3],[gtk+-3.0 >= $GTK3_REQUIRED],[have_gtk_3=yes],[have_gtk_3=no]);;
+  both) PKG_CHECK_MODULES([GTK2],[gtk+-2.0 >= $GTK2_REQUIRED],[have_gtk_2=yes],[have_gtk_2=no])
+	PKG_CHECK_MODULES([GTK3],[gtk+-3.0 >= $GTK3_REQUIRED],[have_gtk_3=yes],[have_gtk_3=no]);;
+esac
 
   if test "$have_gtk_2" = "yes"; then
      GTK2_BINARY_VERSION="`$PKG_CONFIG --variable=gtk_binary_version gtk+-2.0`"