diff --git a/CMakeLists.txt b/CMakeLists.txt
index cc45f6f394..c79ad2be6e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -76,6 +76,10 @@ if(POLICY CMP0022)
   cmake_policy(SET CMP0022 OLD)
 endif()
 
+if(POLICY CMP0023)
+  cmake_policy(SET CMP0023 NEW)
+endif()
+
 if(POLICY CMP0026)
   # silence cmake 3.0+ warnings about reading LOCATION attribute
   cmake_policy(SET CMP0026 OLD)
diff --git a/cmake/FindCUDA/run_nvcc.cmake b/cmake/FindCUDA/run_nvcc.cmake
index abdd3079e1..8d1ceb1663 100644
--- a/cmake/FindCUDA/run_nvcc.cmake
+++ b/cmake/FindCUDA/run_nvcc.cmake
@@ -72,7 +72,7 @@ set(generated_cubin_file_internal "@generated_cubin_file@") # path
 set(CUDA_NVCC_EXECUTABLE "@CUDA_NVCC_EXECUTABLE@") # path
 set(CUDA_NVCC_FLAGS @CUDA_NVCC_FLAGS@ ;; @CUDA_WRAP_OPTION_NVCC_FLAGS@) # list
 @CUDA_NVCC_FLAGS_CONFIG@
-set(nvcc_flags @nvcc_flags@) # list
+set(nvcc_flags "@nvcc_flags@") # list
 set(CUDA_NVCC_INCLUDE_ARGS "@CUDA_NVCC_INCLUDE_ARGS@") # list (needs to be in quotes to handle spaces properly).
 set(format_flag "@format_flag@") # string
 
diff --git a/cmake/OpenCVDetectCXXCompiler.cmake b/cmake/OpenCVDetectCXXCompiler.cmake
index 8ecf4d82bd..e7dac80275 100644
--- a/cmake/OpenCVDetectCXXCompiler.cmake
+++ b/cmake/OpenCVDetectCXXCompiler.cmake
@@ -172,3 +172,13 @@ elseif(MINGW)
     set(OpenCV_ARCH x86)
   endif()
 endif()
+
+# Fix handling of duplicated files in the same static library:
+# https://public.kitware.com/Bug/view.php?id=14874
+if(CMAKE_VERSION VERSION_LESS "3.1")
+  foreach(var CMAKE_C_ARCHIVE_APPEND CMAKE_CXX_ARCHIVE_APPEND)
+    if(${var} MATCHES "^<CMAKE_AR> r")
+      string(REPLACE "<CMAKE_AR> r" "<CMAKE_AR> q" ${var} "${${var}}")
+    endif()
+  endforeach()
+endif()
diff --git a/cmake/OpenCVGenABI.cmake b/cmake/OpenCVGenABI.cmake
index 86aa78b17b..e9d6a33481 100644
--- a/cmake/OpenCVGenABI.cmake
+++ b/cmake/OpenCVGenABI.cmake
@@ -33,10 +33,12 @@ foreach(mod ${OPENCV_MODULES_BUILD})
       list(APPEND OPENCV_ABI_SKIP_HEADERS "${h}")
     endforeach()
     # libraries
-    set(lib_name "")
-    get_target_property(lib_name opencv_${mod} LOCATION)
-    get_filename_component(lib_name "${lib_name}" NAME)
-    list(APPEND OPENCV_ABI_SKIP_LIBRARIES "${lib_name}")
+    if(TARGET opencv_${mod}) # opencv_world
+      set(lib_name "")
+      get_target_property(lib_name opencv_${mod} LOCATION)
+      get_filename_component(lib_name "${lib_name}" NAME)
+      list(APPEND OPENCV_ABI_SKIP_LIBRARIES "${lib_name}")
+    endif()
   endif()
 endforeach()
 string(REPLACE ";" "\n    " OPENCV_ABI_SKIP_HEADERS "${OPENCV_ABI_SKIP_HEADERS}")
diff --git a/cmake/OpenCVModule.cmake b/cmake/OpenCVModule.cmake
index ebeb25cf2b..6e6fe16c32 100644
--- a/cmake/OpenCVModule.cmake
+++ b/cmake/OpenCVModule.cmake
@@ -182,7 +182,7 @@ macro(ocv_add_module _name)
     # add self to the world dependencies
     if((NOT DEFINED OPENCV_MODULE_IS_PART_OF_WORLD
         AND NOT OPENCV_MODULE_${the_module}_CLASS STREQUAL "BINDINGS"
-        AND NOT OPENCV_PROCESSING_EXTRA_MODULES
+        AND (NOT OPENCV_PROCESSING_EXTRA_MODULES OR NOT OPENCV_WORLD_EXCLUDE_EXTRA_MODULES)
         AND (NOT BUILD_SHARED_LIBS OR NOT "x${OPENCV_MODULE_TYPE}" STREQUAL "xSTATIC"))
         OR OPENCV_MODULE_IS_PART_OF_WORLD
         )
@@ -233,7 +233,7 @@ macro(ocv_add_module _name)
 endmacro()
 
 # excludes module from current configuration
-macro(ocv_module_disable module)
+macro(ocv_module_disable_ module)
   set(__modname ${module})
   if(NOT __modname MATCHES "^opencv_")
     set(__modname opencv_${module})
@@ -246,9 +246,12 @@ macro(ocv_module_disable module)
     # touch variable controlling build of the module to suppress "unused variable" CMake warning
   endif()
   unset(__modname)
-  return() # leave the current folder
 endmacro()
 
+macro(ocv_module_disable module)
+  ocv_module_disable_(${module})
+  return() # leave the current folder
+endmacro()
 
 # collect modules from specified directories
 # NB: must be called only once!
@@ -724,8 +727,10 @@ endmacro()
 #   ocv_create_module(<extra link dependencies>)
 #   ocv_create_module()
 macro(ocv_create_module)
-  ocv_debug_message("ocv_create_module(" ${ARGN} ")")
-  set(OPENCV_MODULE_${the_module}_LINK_DEPS "${OPENCV_MODULE_${the_module}_LINK_DEPS};${ARGN}" CACHE INTERNAL "")
+  ocv_debug_message("${the_module}: ocv_create_module(" ${ARGN} ")")
+  if(NOT " ${ARGN}" STREQUAL " ")
+    set(OPENCV_MODULE_${the_module}_LINK_DEPS "${OPENCV_MODULE_${the_module}_LINK_DEPS};${ARGN}" CACHE INTERNAL "")
+  endif()
   if(${BUILD_opencv_world} AND OPENCV_MODULE_${the_module}_IS_PART_OF_WORLD)
     # nothing
     set(the_module_target opencv_world)
diff --git a/cmake/OpenCVPCHSupport.cmake b/cmake/OpenCVPCHSupport.cmake
index 90437cb204..29f21d8015 100644
--- a/cmake/OpenCVPCHSupport.cmake
+++ b/cmake/OpenCVPCHSupport.cmake
@@ -303,9 +303,11 @@ ENDMACRO(ADD_PRECOMPILED_HEADER)
 
 MACRO(GET_NATIVE_PRECOMPILED_HEADER _targetName _input)
 
+  if(ENABLE_PRECOMPILED_HEADERS)
     if(CMAKE_GENERATOR MATCHES "^Visual.*$")
         set(${_targetName}_pch ${CMAKE_CURRENT_BINARY_DIR}/${_targetName}_pch.cpp)
     endif()
+  endif()
 
 ENDMACRO(GET_NATIVE_PRECOMPILED_HEADER)
 
diff --git a/cmake/OpenCVUtils.cmake b/cmake/OpenCVUtils.cmake
index 7a0e448f77..474f7db609 100644
--- a/cmake/OpenCVUtils.cmake
+++ b/cmake/OpenCVUtils.cmake
@@ -887,7 +887,14 @@ function(ocv_target_link_libraries target)
   if(";${LINK_DEPS};" MATCHES ";${target};")
     list(REMOVE_ITEM LINK_DEPS "${target}") # prevent "link to itself" warning (world problem)
   endif()
-  target_link_libraries(${target} ${LINK_DEPS})
+  if(NOT TARGET ${target})
+    if(NOT DEFINED OPENCV_MODULE_${target}_LOCATION)
+      message(FATAL_ERROR "ocv_target_link_libraries: invalid target: '${target}'")
+    endif()
+    set(OPENCV_MODULE_${target}_LINK_DEPS ${OPENCV_MODULE_${target}_LINK_DEPS} ${LINK_DEPS} CACHE INTERNAL "" FORCE)
+  else()
+    target_link_libraries(${target} ${LINK_DEPS})
+  endif()
 endfunction()
 
 function(_ocv_append_target_includes target)
diff --git a/modules/python/CMakeLists.txt b/modules/python/CMakeLists.txt
index 1da5e329d6..d85a516791 100644
--- a/modules/python/CMakeLists.txt
+++ b/modules/python/CMakeLists.txt
@@ -2,16 +2,26 @@
 #  CMake file for python support
 # ----------------------------------------------------------------------------
 
-if((WIN32 AND CMAKE_BUILD_TYPE STREQUAL "Debug")
-    OR BUILD_opencv_world
-    )
-  ocv_module_disable(python2)
-  ocv_module_disable(python3)
+if(ANDROID OR APPLE_FRAMEWORK OR WINRT)
+  set(__disable_python2 ON)
+  set(__disable_python3 ON)
+elseif(BUILD_opencv_world OR (WIN32 AND CMAKE_BUILD_TYPE STREQUAL "Debug"))
+  if(NOT DEFINED BUILD_opencv_python2)
+    set(__disable_python2 ON)
+  endif()
+  if(NOT DEFINED BUILD_opencv_python3)
+    set(__disable_python3 ON)
+  endif()
 endif()
 
-if(ANDROID OR APPLE_FRAMEWORK OR WINRT)
-  ocv_module_disable(python2)
-  ocv_module_disable(python3)
+if(__disable_python2)
+  ocv_module_disable_(python2)
+endif()
+if(__disable_python3)
+  ocv_module_disable_(python3)
+endif()
+if(__disable_python2 AND __disable_python3)
+  return()
 endif()
 
 add_subdirectory(python2)
diff --git a/modules/shape/src/precomp.cpp b/modules/shape/src/precomp.cpp
deleted file mode 100644
index 730edbb63d..0000000000
--- a/modules/shape/src/precomp.cpp
+++ /dev/null
@@ -1,45 +0,0 @@
-/*M///////////////////////////////////////////////////////////////////////////////////////
-//
-//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
-//
-//  By downloading, copying, installing or using the software you agree to this license.
-//  If you do not agree to this license, do not download, install,
-//  copy or use the software.
-//
-//
-//                          License Agreement
-//                For Open Source Computer Vision Library
-//
-// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
-// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
-// Third party copyrights are property of their respective owners.
-//
-// Redistribution and use in source and binary forms, with or without modification,
-// are permitted provided that the following conditions are met:
-//
-//   * Redistribution's of source code must retain the above copyright notice,
-//     this list of conditions and the following disclaimer.
-//
-//   * Redistribution's in binary form must reproduce the above copyright notice,
-//     this list of conditions and the following disclaimer in the documentation
-//     and/or other materials provided with the distribution.
-//
-//   * The name of the copyright holders may not be used to endorse or promote products
-//     derived from this software without specific prior written permission.
-//
-// This software is provided by the copyright holders and contributors "as is" and
-// any express or implied warranties, including, but not limited to, the implied
-// warranties of merchantability and fitness for a particular purpose are disclaimed.
-// In no event shall the Intel Corporation or contributors be liable for any direct,
-// indirect, incidental, special, exemplary, or consequential damages
-// (including, but not limited to, procurement of substitute goods or services;
-// loss of use, data, or profits; or business interruption) however caused
-// and on any theory of liability, whether in contract, strict liability,
-// or tort (including negligence or otherwise) arising in any way out of
-// the use of this software, even if advised of the possibility of such damage.
-//
-//M*/
-
-#include "precomp.hpp"
-
-/* End of file. */
diff --git a/modules/stitching/CMakeLists.txt b/modules/stitching/CMakeLists.txt
index 76c7bc8489..0e4f39a99d 100644
--- a/modules/stitching/CMakeLists.txt
+++ b/modules/stitching/CMakeLists.txt
@@ -5,7 +5,7 @@ if(HAVE_CUDA)
 endif()
 
 set(STITCHING_CONTRIB_DEPS "opencv_xfeatures2d")
-if(BUILD_SHARED_LIBS AND BUILD_opencv_world)
+if(BUILD_SHARED_LIBS AND BUILD_opencv_world AND OPENCV_WORLD_EXCLUDE_EXTRA_MODULES)
   set(STITCHING_CONTRIB_DEPS "")
 endif()
 ocv_define_module(stitching opencv_imgproc opencv_features2d opencv_calib3d opencv_objdetect
diff --git a/modules/ts/misc/run_utils.py b/modules/ts/misc/run_utils.py
index 8740aa7855..2e9a66f8bd 100644
--- a/modules/ts/misc/run_utils.py
+++ b/modules/ts/misc/run_utils.py
@@ -193,7 +193,7 @@ class CMakeCache:
         self.tests_dir = os.path.normpath(path)
 
     def read(self, path, fname):
-        rx = re.compile(r'^opencv_(\w+)_SOURCE_DIR:STATIC=(.*)$')
+        rx = re.compile(r'^OPENCV_MODULE_opencv_(\w+)_LOCATION:INTERNAL=(.*)$')
         module_paths = {} # name -> path
         with open(fname, "rt") as cachefile:
             for l in cachefile.readlines():
diff --git a/modules/viz/CMakeLists.txt b/modules/viz/CMakeLists.txt
index 9fd0301635..a22f52fd87 100644
--- a/modules/viz/CMakeLists.txt
+++ b/modules/viz/CMakeLists.txt
@@ -2,12 +2,14 @@ if(NOT WITH_VTK OR NOT DEFINED HAVE_VTK OR NOT HAVE_VTK)
   ocv_module_disable(viz)
 endif()
 
-include(${VTK_USE_FILE})
 set(the_description "Viz")
-ocv_define_module(viz opencv_core ${VTK_LIBRARIES} WRAP python)
+ocv_define_module(viz opencv_core WRAP python)
+
+include(${VTK_USE_FILE})
+ocv_target_link_libraries(${the_module} ${VTK_LIBRARIES})
 
 if(APPLE AND BUILD_opencv_viz)
-  ocv_target_link_libraries(opencv_viz "-framework Cocoa")
+  ocv_target_link_libraries(${the_module} "-framework Cocoa")
 endif()
 
 if(TARGET opencv_test_viz)
diff --git a/modules/world/CMakeLists.txt b/modules/world/CMakeLists.txt
index 1a77245df2..dde793fa00 100644
--- a/modules/world/CMakeLists.txt
+++ b/modules/world/CMakeLists.txt
@@ -11,6 +11,11 @@ endif()
 
 function(include_one_module m)
   include("${OPENCV_MODULE_${m}_LOCATION}/CMakeLists.txt")
+  foreach(var
+      CMAKE_CXX_FLAGS CMAKE_C_FLAGS # Propagate warnings settings
+  )
+    set(${var} "${${var}}" PARENT_SCOPE)
+  endforeach()
 endfunction()
 
 if(NOT OPENCV_INITIAL_PASS)
@@ -35,12 +40,14 @@ ocv_add_module(world opencv_core)
 set(headers_list "HEADERS")
 set(sources_list "SOURCES")
 set(link_deps "")
-foreach(m ${OPENCV_MODULE_${the_module}_DEPS})
+foreach(m ${OPENCV_MODULE_${the_module}_DEPS} opencv_world)
   if(OPENCV_MODULE_${m}_IS_PART_OF_WORLD)
     set(headers_list "${headers_list};${OPENCV_MODULE_${m}_HEADERS}")
     set(sources_list "${sources_list};${OPENCV_MODULE_${m}_SOURCES}")
   endif()
-  set(link_deps "${link_deps};${OPENCV_MODULE_${m}_LINK_DEPS}")
+  if(NOT " ${OPENCV_MODULE_${m}_LINK_DEPS}" STREQUAL " ")
+    list(APPEND link_deps ${OPENCV_MODULE_${m}_LINK_DEPS})
+  endif()
 endforeach()
 
 ocv_glob_module_sources(${headers_list} ${sources_list})
diff --git a/samples/gpu/CMakeLists.txt b/samples/gpu/CMakeLists.txt
index 8c97ea865a..0f734677be 100644
--- a/samples/gpu/CMakeLists.txt
+++ b/samples/gpu/CMakeLists.txt
@@ -14,27 +14,19 @@ if(BUILD_EXAMPLES AND OCV_DEPENDENCIES_FOUND)
   project("${project}_samples")
 
   ocv_include_modules_recurse(${OPENCV_CUDA_SAMPLES_REQUIRED_DEPS})
-  ocv_include_directories(
-    "${OpenCV_SOURCE_DIR}/modules/gpu/src/nvidia"
-    "${OpenCV_SOURCE_DIR}/modules/gpu/src/nvidia/core"
-    )
 
   if(HAVE_opencv_xfeatures2d)
-    ocv_include_directories("${OpenCV_SOURCE_DIR}/modules/xfeatures2d/include")
+    ocv_include_modules_recurse(opencv_xfeatures2d)
   endif()
 
   if(HAVE_opencv_cudacodec)
-    ocv_include_directories("${OpenCV_SOURCE_DIR}/modules/cudacodec/include")
+    ocv_include_modules_recurse(opencv_cudacodec)
   endif()
 
   if(HAVE_CUDA)
     ocv_include_directories(${CUDA_INCLUDE_DIRS})
   endif()
 
-  if(HAVE_OPENCL)
-    ocv_include_directories("${OpenCV_SOURCE_DIR}/modules/ocl/include")
-  endif()
-
   if(CMAKE_COMPILER_IS_GNUCXX AND NOT ENABLE_NOISY_WARNINGS)
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-unused-function")
   endif()
diff --git a/samples/gpu/performance/CMakeLists.txt b/samples/gpu/performance/CMakeLists.txt
index 9c9fb5b676..2b1bf0be6b 100644
--- a/samples/gpu/performance/CMakeLists.txt
+++ b/samples/gpu/performance/CMakeLists.txt
@@ -4,11 +4,11 @@ file(GLOB sources "performance/*.cpp")
 file(GLOB headers "performance/*.h")
 
 if(HAVE_opencv_xfeatures2d)
-  ocv_include_directories("${opencv_xfeatures2d_SOURCE_DIR}/include")
+  ocv_include_modules_recurse(opencv_xfeatures2d)
 endif()
 
 if(HAVE_opencv_bgsegm)
-  ocv_include_directories("${opencv_bgsegm_SOURCE_DIR}/include")
+  ocv_include_modules_recurse(opencv_bgsegm)
 endif()
 
 add_executable(${the_target} ${sources} ${headers})