https://bugs.gentoo.org/707496

From f2943bdf61afe0a3ad2227d72fcbcac8b3088b1a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20Stan=C4=9Bk?= <jstanek@redhat.com>
Date: Tue, 28 Jan 2020 15:27:24 +0100
Subject: [PATCH] Declare wlr_seat globals as extern

---
 include/types/wlr_seat.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/include/types/wlr_seat.h
+++ b/include/types/wlr_seat.h
@@ -4,9 +4,9 @@
 #include <wayland-server-core.h>
 #include <wlr/types/wlr_seat.h>
 
-const struct wlr_pointer_grab_interface default_pointer_grab_impl;
-const struct wlr_keyboard_grab_interface default_keyboard_grab_impl;
-const struct wlr_touch_grab_interface default_touch_grab_impl;
+extern const struct wlr_pointer_grab_interface default_pointer_grab_impl;
+extern const struct wlr_keyboard_grab_interface default_keyboard_grab_impl;
+extern const struct wlr_touch_grab_interface default_touch_grab_impl;
 
 void seat_client_create_pointer(struct wlr_seat_client *seat_client,
 	uint32_t version, uint32_t id);