commit 1d5cdc7d46ffee3475beec9572d049f18cd1c155
Author: Kevin Zheng <kevinz5000@gmail.com>
Date:   Sun Aug 23 10:42:15 2020 -0700

    games/crossfire-client: Fix build with -fno-common

diff --git a/games/crossfire-client/files/patch-gtk-v2_src_main.h b/games/crossfire-client/files/patch-gtk-v2_src_main.h
new file mode 100644
index 000000000000..30fdb995db0d
--- /dev/null
+++ b/games/crossfire-client/files/patch-gtk-v2_src_main.h
@@ -0,0 +1,11 @@
+--- gtk-v2/src/main.h.orig	2019-08-19 02:12:05 UTC
++++ gtk-v2/src/main.h
+@@ -34,7 +34,7 @@ extern int map_image_size, map_image_half_size, image_
+ #define DIALOG_FILENAME CF_DATADIR "/ui/dialogs.ui"
+ 
+ /** Path to the current UI file. */
+-char window_xml_file[MAX_BUF];
++extern char window_xml_file[MAX_BUF];
+ 
+ #define MAGIC_MAP_PAGE  1 /**< Notebook page of the magic map */
+