From a12e144e86355ec353b53c89e9cd39dd0e8cded4 Mon Sep 17 00:00:00 2001
From: Hamdi Sahloul <hamdisahloul@hotmail.com>
Date: Wed, 12 Sep 2018 13:23:36 +0900
Subject: [PATCH] MSVC: Slience external/meaningless warnings

---
 modules/calib3d/src/dls.cpp                   |  9 +++++++++
 modules/core/include/opencv2/core/private.hpp |  9 +++++++++
 modules/core/src/cuda_stream.cpp              |  4 ++++
 modules/core/src/lapack.cpp                   | 15 ++++++++++++---
 modules/core/src/opengl.cpp                   |  4 ++++
 modules/features2d/src/matchers.cpp           | 11 ++++++++++-
 modules/python/src2/cv2.cpp                   |  5 +++--
 7 files changed, 51 insertions(+), 6 deletions(-)

diff --git a/modules/calib3d/src/dls.cpp b/modules/calib3d/src/dls.cpp
index 8f814f0d3781..93c409b03035 100644
--- a/modules/calib3d/src/dls.cpp
+++ b/modules/calib3d/src/dls.cpp
@@ -7,8 +7,17 @@
 #  if defined __GNUC__ && defined __APPLE__
 #    pragma GCC diagnostic ignored "-Wshadow"
 #  endif
+#  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
 
diff --git a/modules/core/include/opencv2/core/private.hpp b/modules/core/include/opencv2/core/private.hpp
index 6f6457be1b84..b037fbd28211 100644
--- a/modules/core/include/opencv2/core/private.hpp
+++ b/modules/core/include/opencv2/core/private.hpp
@@ -57,7 +57,16 @@
 #  if defined __GNUC__ && defined __APPLE__
 #    pragma GCC diagnostic ignored "-Wshadow"
 #  endif
+#  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>
+#  if defined(_MSC_VER)
+#    pragma warning(pop)
+#  endif
 #  include "opencv2/core/eigen.hpp"
 #endif
 
diff --git a/modules/core/src/cuda_stream.cpp b/modules/core/src/cuda_stream.cpp
index 99cd1748db49..6790b0aa0ff2 100644
--- a/modules/core/src/cuda_stream.cpp
+++ b/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
 
diff --git a/modules/core/src/lapack.cpp b/modules/core/src/lapack.cpp
index dab427e20d68..ed10e73d73b0 100644
--- a/modules/core/src/lapack.cpp
+++ b/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
diff --git a/modules/core/src/opengl.cpp b/modules/core/src/opengl.cpp
index e044c25cc450..ba57f1626837 100644
--- a/modules/core/src/opengl.cpp
+++ b/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
diff --git a/modules/features2d/src/matchers.cpp b/modules/features2d/src/matchers.cpp
index 486b1b916aac..6bf23f331c67 100644
--- a/modules/features2d/src/matchers.cpp
+++ b/modules/features2d/src/matchers.cpp
@@ -44,7 +44,16 @@
 #include "opencl_kernels_features2d.hpp"
 
 #if defined(HAVE_EIGEN) && EIGEN_WORLD_VERSION == 2
-#include <Eigen/Array>
+#  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/Array>
+#  if defined(_MSC_VER)
+#    pragma warning(pop)
+#  endif
 #endif
 
 namespace cv
diff --git a/modules/python/src2/cv2.cpp b/modules/python/src2/cv2.cpp
index 03d34196a958..a0032b7e1a31 100644
--- a/modules/python/src2/cv2.cpp
+++ b/modules/python/src2/cv2.cpp
@@ -1,4 +1,5 @@
-#if defined(_MSC_VER) && (_MSC_VER >= 1800)
+//warning number '5033' not a valid compiler warning in vc12
+#if defined(_MSC_VER) && (_MSC_VER > 1800)
 // eliminating duplicated round() declaration
 #define HAVE_ROUND 1
 #pragma warning(push)
@@ -6,7 +7,7 @@
 #endif
 #include <math.h>
 #include <Python.h>
-#if defined(_MSC_VER) && (_MSC_VER >= 1800)
+#if defined(_MSC_VER) && (_MSC_VER > 1800)
 #pragma warning(pop)
 #endif