core: add CV_CXX_11 flag to cvdef.h

modules/core/include/opencv2/core/cvdef.h

@@ -358,6 +358,20 @@ Cv64suf;
 #endif
 
 
+/****************************************************************************************\
+*                                    C++ 11                                              *
+\****************************************************************************************/
+#ifndef CV_CXX_11
+#  if __cplusplus >= 201103L || defined(_MSC_VER) && _MSC_VER >= 1600
+#    define CV_CXX_11 1
+#  endif
+#else
+#  if CV_CXX_11 == 0
+#    undef CV_CXX_11
+#  endif
+#endif
+
+
 /****************************************************************************************\
 *                                    C++ Move semantics                                  *
 \****************************************************************************************/

modules/core/include/opencv2/core/utility.hpp

@@ -56,7 +56,7 @@
 #include "opencv2/core.hpp"
 #include <ostream>
 
-#if __cplusplus >= 201103L
+#ifdef CV_CXX_11
 #include <functional>
 #endif
 
@@ -482,7 +482,7 @@ public:
 */
 CV_EXPORTS void parallel_for_(const Range& range, const ParallelLoopBody& body, double nstripes=-1.);
 
-#if __cplusplus >= 201103L
+#ifdef CV_CXX_11
 class ParallelLoopBodyLambdaWrapper : public ParallelLoopBody
 {
 private:

samples/cpp/tutorial_code/core/how_to_use_OpenCV_parallel_for_/how_to_use_OpenCV_parallel_for_.cpp

@@ -102,7 +102,7 @@ int main()
 
     double t1 = (double) getTickCount();
 
-    #if __cplusplus >= 201103L
+    #ifdef CV_CXX_11
 
     //! [mandelbrot-parallel-call-cxx11]
     parallel_for_(Range(0, mandelbrotImg.rows*mandelbrotImg.cols), [&](const Range& range){