patch 7.4.1402
Problem: GTK 3 is not supported.
Solution: Add GTK 3 support. (Kazunobu Kuriyama)
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 022a5da..abc022d 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -7315,6 +7315,7 @@
gui_gnome Compiled with Gnome support (gui_gtk is also defined).
gui_gtk Compiled with GTK+ GUI (any version).
gui_gtk2 Compiled with GTK+ 2 GUI (gui_gtk is also defined).
+gui_gtk3 Compiled with GTK+ 3 GUI (gui_gtk is also defined).
gui_mac Compiled with Macintosh GUI.
gui_motif Compiled with Motif GUI.
gui_photon Compiled with Photon GUI.