From 7ab63688699104adf439239cc08f5e1503d762ff Mon Sep 17 00:00:00 2001
From: jean-pierre charras <jp.charras@wanadoo.fr>
Date: Wed, 9 Aug 2017 14:04:46 +0200
Subject: [PATCH] Fix compil problems in utils.cpp, to be compatible with
 msys2/windows and linux.

---
 common/gal/opengl/utils.cpp | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/common/gal/opengl/utils.cpp b/common/gal/opengl/utils.cpp
index e8644c876b..ea6d200f36 100644
--- a/common/gal/opengl/utils.cpp
+++ b/common/gal/opengl/utils.cpp
@@ -83,8 +83,17 @@ int checkGlError( const std::string& aInfo, bool aThrow )
 }
 
 
-static void debugMsgCallback( GLenum aSource, GLenum aType, GLuint aId,
-   GLenum aSeverity, GLsizei aLength, const GLchar* aMessage, void* aUserParam )
+// debugMsgCallback is a callback function for glDebugMessageCallback.
+// It must have a right type on Windows
+#ifdef __WINDOWS__
+#include <windef.h>
+#define CB_TYPE APIENTRY
+#else
+#define CB_TYPE
+#endif
+
+static void CB_TYPE debugMsgCallback( GLenum aSource, GLenum aType, GLuint aId,
+   GLenum aSeverity, GLsizei aLength, const GLchar* aMessage, const void* aUserParam )
 {
     printf( "%s", aMessage );
 }