From 989ceddc191419daa02b08f664bbbce11cbc5598 Mon Sep 17 00:00:00 2001
From: Johannes Zarl <johannes@zarl.at>
Date: Fri, 10 Jul 2015 16:31:42 +0200
Subject: [PATCH] Fix compilation on Linux.

Commit ce15044f7362943aee7d465bf20310ba02991dae introduced an error
"undefined reference to `sball_initialized'" on non-Windows operating
systems.
---
 freeglut/freeglut/src/fg_spaceball.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/freeglut/freeglut/src/fg_spaceball.c b/freeglut/freeglut/src/fg_spaceball.c
index 16b0c52..9534746 100644
--- a/freeglut/freeglut/src/fg_spaceball.c
+++ b/freeglut/freeglut/src/fg_spaceball.c
@@ -11,7 +11,7 @@
 #include <GL/freeglut.h>
 #include "fg_internal.h"
 
-#if(_WIN32_WINNT >= 0x0501)
+#if( !_WIN32 || _WIN32_WINNT >= 0x0501)
 
 /* -- PRIVATE FUNCTIONS --------------------------------------------------- */