From 678e114e5fc3fddc23f3ec1619a479895d0707ca Mon Sep 17 00:00:00 2001
From: Tony Theodore <tonyt@logyst.com>
Date: Mon, 6 Feb 2017 04:15:10 +1100
Subject: [PATCH] highgui: use forward slash for gl.h include

The backslash causes build failure when cross-compiling with mingw-w64
---
 modules/highgui/src/window_w32.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/highgui/src/window_w32.cpp b/modules/highgui/src/window_w32.cpp
index cadbdf7069..012e4d147a 100644
--- a/modules/highgui/src/window_w32.cpp
+++ b/modules/highgui/src/window_w32.cpp
@@ -65,7 +65,7 @@
 #include <vector>
 #include <functional>
 #include "opencv2/highgui.hpp"
-#include <GL\gl.h>
+#include <GL/gl.h>
 #endif
 
 static const char* trackbar_text =