Prepare to GTK3

configure.ac.in

@@ -10,13 +10,13 @@ m4_define([xfwm4_version_build], [@REVISION@])
 m4_define([xfwm4_version_tag],   [git])
 m4_define([xfwm4_version], [xfwm4_version_major().xfwm4_version_minor().xfwm4_version_micro()ifelse(xfwm4_version_tag(), [git], [xfwm4_version_tag().xfwm4_version_build()], [xfwm4_version_tag()])])
 
-m4_define([gtk_minimum_version], [2.14.0])
+m4_define([gtk_minimum_version], [3.20.0])
 m4_define([xfce_minimum_version], [4.8.0])
-m4_define([libxfce4ui_minimum_version], [4.11.0])
-m4_define([libxfce4kbd_private_minimum_version], [4.8.0])
-m4_define([xfconf_minimum_version], [4.8.0])
+m4_define([libxfce4ui_minimum_version], [4.12.0])
+m4_define([libxfce4kbd_private_minimum_version], [4.12.0])
+m4_define([xfconf_minimum_version], [4.12.0])
 m4_define([xcomposite_minimum_version], [0.2])
-m4_define([wnck_minimum_version], [2.22])
+m4_define([wnck_minimum_version], [3.14])
 m4_define([startup_notification_minimum_version], [0.5])
 m4_define([intltool_minimum_version], [0.35])
 m4_define([libepoxy_minimum_version], [1.0])
@@ -89,12 +89,12 @@ AC_CHECK_LIB([Xext], [XShapeCombineShape],
     fi
   ], [], [$LIBX11_CFLAGS $LIBX11_LDFLAGS $LIBX11_LIBS])
 
-XDT_CHECK_PACKAGE([GTK], [gtk+-2.0], [gtk_minimum_version])
+XDT_CHECK_PACKAGE([GTK], [gtk+-3.0], [gtk_minimum_version])
 XDT_CHECK_PACKAGE([LIBXFCE4UTIL], [libxfce4util-1.0], [xfce_minimum_version])
-XDT_CHECK_PACKAGE([LIBXFCE4UI], libxfce4ui-1, [libxfce4ui_minimum_version])
-XDT_CHECK_PACKAGE([LIBXFCE4KBD_PRIVATE], libxfce4kbd-private-2, [libxfce4kbd_private_minimum_version])
+XDT_CHECK_PACKAGE([LIBXFCE4UI], libxfce4ui-2, [libxfce4ui_minimum_version])
+XDT_CHECK_PACKAGE([LIBXFCE4KBD_PRIVATE], libxfce4kbd-private-3, [libxfce4kbd_private_minimum_version])
 XDT_CHECK_PACKAGE([LIBXFCONF], libxfconf-0, [xfconf_minimum_version])
-XDT_CHECK_PACKAGE([LIBWNCK], [libwnck-1.0], [wnck_minimum_version])
+XDT_CHECK_PACKAGE([LIBWNCK], [libwnck-3.0], [wnck_minimum_version])
 XDT_CHECK_PACKAGE([DBUS], [dbus-1], [1.0.0])
 XDT_CHECK_PACKAGE([DBUS_GLIB], [dbus-glib-1], [0.72])
 XDT_CHECK_PACKAGE([XINERAMA], [xinerama], [0])