From a48b0b1cd887d7f3ae67f525d7d334bd2feffe60 Mon Sep 17 00:00:00 2001
From: Alexander Tsoy <alexander@tsoy.me>
Date: Tue, 28 Jan 2020 22:21:01 +0300
Subject: [PATCH] Fix build with -fno-common

Index: src/util.h
--- src/util.h.orig
+++ src/util.h
@@ -102,9 +102,9 @@ extern struct timeval _mysleep;
 #ifdef LIBVNCSERVER_HAVE_LIBPTHREAD
 extern MUTEX(x11Mutex);
 extern MUTEX(scrollMutex);
-MUTEX(clientMutex);
-MUTEX(inputMutex);
-MUTEX(pointerMutex);
+extern MUTEX(clientMutex);
+extern MUTEX(inputMutex);
+extern MUTEX(pointerMutex);
 #endif
 
 #define X_INIT INIT_MUTEX(x11Mutex)