From dbcf800353344e1b705aca878895004130fe76ed Mon Sep 17 00:00:00 2001
From: bubnikv <bubnikv@gmail.com>
Date: Fri, 25 Jan 2019 09:57:08 +0100
Subject: [PATCH] Yet another compilation fix on OSX

---
 src/slic3r/GUI/GLCanvas3D.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index 8b0af67b7..4d14fca4b 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -6558,7 +6558,11 @@ public:
 	#ifdef _MSC_VER
 		typedef void (__stdcall *_GLUfuncptr)(void);
 	#else /* _MSC_VER */
-		typedef void (GLAPIENTRYP _GLUfuncptr)(void);
+        #ifdef GLAPIENTRYP
+            typedef void (GLAPIENTRYP _GLUfuncptr)(void);
+        #else /* GLAPIENTRYP */
+            typedef void (*_GLUfuncptr)(void);
+        #endif
 	#endif /* _MSC_VER */
 #endif /* _GLUfuncptr */
 		gluTessCallback(tess, GLU_TESS_BEGIN,   (_GLUfuncptr)tessBeginCB);