MSVC: Slience external/meaningless warnings

modules/core/src/cuda_stream.cpp

@@ -45,6 +45,10 @@
 using namespace cv;
 using namespace cv::cuda;
 
+#if defined(_MSC_VER)
+#pragma warning(disable : 4702)  // unreachable code
+#endif
+
 /////////////////////////////////////////////////////////////
 /// MemoryStack
 

modules/core/src/lapack.cpp

@@ -44,9 +44,18 @@
 #include <limits>
 
 #ifdef HAVE_EIGEN
-#include <Eigen/Core>
-#include <Eigen/Eigenvalues>
-#include "opencv2/core/eigen.hpp"
+#  if defined(_MSC_VER)
+#    pragma warning(push)
+#    pragma warning(disable:4701)  // potentially uninitialized local variable
+#    pragma warning(disable:4702)  // unreachable code
+#    pragma warning(disable:4714)  // const marked as __forceinline not inlined
+#  endif
+#  include <Eigen/Core>
+#  include <Eigen/Eigenvalues>
+#  if defined(_MSC_VER)
+#    pragma warning(pop)
+#  endif
+#  include "opencv2/core/eigen.hpp"
 #endif
 
 #if defined _M_IX86 && defined _MSC_VER && _MSC_VER < 1700

modules/core/src/opengl.cpp

@@ -54,6 +54,10 @@
 using namespace cv;
 using namespace cv::cuda;
 
+#if defined(_MSC_VER)
+#pragma warning(disable : 4702)  // unreachable code
+#endif
+
 namespace
 {
 #ifndef HAVE_OPENGL