From b4b4d212120fd5dae3a9c85d81fad4b5166ba4ba Mon Sep 17 00:00:00 2001
From: Alexander Alekhin <alexander.a.alekhin@gmail.com>
Date: Thu, 26 Mar 2020 19:05:07 +0000
Subject: [PATCH] eliminate build warnings

---
 modules/calib3d/src/chessboard.cpp | 9 ---------
 modules/calib3d/src/chessboard.hpp | 2 --
 modules/core/src/parallel.cpp      | 3 +++
 modules/dnn/CMakeLists.txt         | 1 +
 4 files changed, 4 insertions(+), 11 deletions(-)

diff --git a/modules/calib3d/src/chessboard.cpp b/modules/calib3d/src/chessboard.cpp
index f72802880a..dbc47722cb 100644
--- a/modules/calib3d/src/chessboard.cpp
+++ b/modules/calib3d/src/chessboard.cpp
@@ -797,15 +797,6 @@ Ellipse::Ellipse(const cv::Point2f &_center, const cv::Size2f &_axes, float _ang
 {
 }
 
-Ellipse::Ellipse(const Ellipse &other)
-{
-    center = other.center;
-    axes= other.axes;
-    angle= other.angle;
-    cosf = other.cosf;
-    sinf = other.sinf;
-}
-
 const cv::Size2f &Ellipse::getAxes()const
 {
     return axes;
diff --git a/modules/calib3d/src/chessboard.hpp b/modules/calib3d/src/chessboard.hpp
index 58c3b79043..4c862eca4c 100644
--- a/modules/calib3d/src/chessboard.hpp
+++ b/modules/calib3d/src/chessboard.hpp
@@ -111,8 +111,6 @@ class Ellipse
     public:
         Ellipse();
         Ellipse(const cv::Point2f &center, const cv::Size2f &axes, float angle);
-        Ellipse(const Ellipse &other);
-
 
         void draw(cv::InputOutputArray img,const cv::Scalar &color = cv::Scalar::all(120))const;
         bool contains(const cv::Point2f &pt)const;
diff --git a/modules/core/src/parallel.cpp b/modules/core/src/parallel.cpp
index 2fcf491ba6..1925a10a72 100644
--- a/modules/core/src/parallel.cpp
+++ b/modules/core/src/parallel.cpp
@@ -95,6 +95,9 @@
 */
 
 #if defined HAVE_TBB
+    #ifndef TBB_SUPPRESS_DEPRECATED_MESSAGES  // supress warning
+    #define TBB_SUPPRESS_DEPRECATED_MESSAGES 1
+    #endif
     #include "tbb/tbb.h"
     #include "tbb/task.h"
     #include "tbb/tbb_stddef.h"
diff --git a/modules/dnn/CMakeLists.txt b/modules/dnn/CMakeLists.txt
index 85631a98f5..27ecd142fb 100644
--- a/modules/dnn/CMakeLists.txt
+++ b/modules/dnn/CMakeLists.txt
@@ -122,6 +122,7 @@ endif()
 ocv_module_include_directories(${include_dirs})
 if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
   ocv_append_source_files_cxx_compiler_options(fw_srcs "-Wno-suggest-override")  # GCC
+  ocv_append_source_files_cxx_compiler_options(fw_srcs "-Wno-array-bounds")  # GCC 9.3.0 (Ubuntu 20.04)
 elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
   ocv_append_source_files_cxx_compiler_options(fw_srcs "-Wno-inconsistent-missing-override")  # Clang
 endif()