From e79f83e573ae2d5b60947d9f7964943425234b92 Mon Sep 17 00:00:00 2001
From: Philippe Renon <philippe_renon@yahoo.fr>
Date: Tue, 15 Nov 2016 00:33:11 +0100
Subject: [PATCH] calib3d: fix missing cv::redirectError symbol error

happens on msys2 with gcc 6.2.0
see also http://stackoverflow.com/questions/38552221/undefined-reference-to-cvredirecterror-while-creating-shared-build-of-opencv-3
---
 modules/core/src/system.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/modules/core/src/system.cpp b/modules/core/src/system.cpp
index b2c0a3b..3c8f39d 100644
--- a/modules/core/src/system.cpp
+++ b/modules/core/src/system.cpp
@@ -621,7 +621,7 @@ String tempfile( const char* suffix )
     return fname;
 }
 
-static CvErrorCallback customErrorCallback = 0;
+static ErrorCallback customErrorCallback = 0;
 static void* customErrorCallbackData = 0;
 static bool breakOnError = false;
 
@@ -666,13 +666,13 @@ void error(int _code, const String& _err, const char* _func, const char* _file,
     error(cv::Exception(_code, _err, _func, _file, _line));
 }
 
-CvErrorCallback
-redirectError( CvErrorCallback errCallback, void* userdata, void** prevUserdata)
+ErrorCallback
+redirectError( ErrorCallback errCallback, void* userdata, void** prevUserdata)
 {
     if( prevUserdata )
         *prevUserdata = customErrorCallbackData;
 
-    CvErrorCallback prevCallback = customErrorCallback;
+    ErrorCallback prevCallback = customErrorCallback;
 
     customErrorCallback     = errCallback;
     customErrorCallbackData = userdata;
-- 
2.7.4