Created attachment 7497 Replace deprecated gtk_dialog_get_action_area function When gladeui2 option is set (with Gtk3 support) we get warning message about gtk_dialog_get_action_area () function is missing in gtk/gtkdialog.h. Possible solution is to cast object (GtkDialog) with the GTK_WIDGET macro.
Thank you Olivier for the patch. I'm not sure we can fix it as simply after reading https://mail.gnome.org/archives/commits-list/2014-January/msg04637.html and https://mail.gnome.org/archives/commits-list/2016-November/msg05726.html . Maybe hiding the deprecation is enough for now (that's what exo did by introducing exo_gtk_dialog_get_action_area(), but we can't use it in libxfce4ui because it does not depend on exo). However I'm not a gtk guru so I let Eric or another dev to decide.
Well, "fixed" in #15781 *** This bug has been marked as a duplicate of bug 15781 ***