diff --git a/build/bakefiles/files.bkl b/build/bakefiles/files.bkl
index 863a733a94..3f84e21ae5 100644
--- a/build/bakefiles/files.bkl
+++ b/build/bakefiles/files.bkl
@@ -3287,7 +3287,7 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
 <!--                             Misc plugin sources:                       -->
 <!-- ====================================================================== -->
 
-<set var="UNIX_SOUND_SRC_SDL" hints="files">
+<set var="UNIX_SOUND_SDL_SRC" hints="files">
     src/unix/sound_sdl.cpp
 </set>
 
@@ -3708,7 +3708,7 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
     <!-- wxAdv sources -->
     <set var="PLUGIN_SRC">
         <if cond="FORMAT=='autoconf' and PLATFORM_UNIX=='1' and USE_PLUGINS=='0'">
-            $(UNIX_SOUND_SRC_SDL)
+            $(UNIX_SOUND_SDL_SRC)
         </if>
     </set>
 
diff --git a/build/bakefiles/plugins.bkl b/build/bakefiles/plugins.bkl
index b346903be1..3820980dbb 100644
--- a/build/bakefiles/plugins.bkl
+++ b/build/bakefiles/plugins.bkl
@@ -7,7 +7,7 @@
     <!-- ================================================================ -->
     
     <wx-base-plugin id="sound_sdl" cond="WITH_PLUGIN_SDL=='1'">
-        <sources>$(UNIX_SOUND_SRC_SDL)</sources>
+        <sources>$(UNIX_SOUND_SDL_SRC)</sources>
         <ldlibs>$(EXTRALIBS_SDL)</ldlibs>
     </wx-base-plugin>
 
diff --git a/build/cmake/config.cmake b/build/cmake/config.cmake
index 04db51a020..b89cbac302 100644
--- a/build/cmake/config.cmake
+++ b/build/cmake/config.cmake
@@ -44,7 +44,7 @@ function(wx_write_config)
 
     # TODO: set variables
     set(includedir "$")
-    wx_string_append(libdir "{prefix}/include")
+    wx_string_append(includedir "{prefix}/include")
     set(libdir "$")
     wx_string_append(libdir "{exec_prefix}/lib")
     set(bindir "$")
diff --git a/build/cmake/files.cmake b/build/cmake/files.cmake
index 455e2d2f11..3111a384c2 100644
--- a/build/cmake/files.cmake
+++ b/build/cmake/files.cmake
@@ -2869,6 +2869,14 @@ set(WEBVIEW_GTK_SRC
     src/gtk/webview_webkit.cpp
 )
 
+set(WEBVIEW2_GTK_SRC
+    src/gtk/webview_webkit2.cpp
+)
+
+set(WEBVIEW_WEBKIT2_EXTENSION_SRC
+    src/gtk/webview_webkit2_extension.cpp
+)
+
 set(XRC_SRC
     src/xrc/xh_activityindicator.cpp
     src/xrc/xh_animatctrl.cpp
@@ -3049,7 +3057,7 @@ set(OPENGL_OSX_SHARED_SRC
     src/osx/glcanvas_osx.cpp
 )
 
-set(UNIX_SOUND_SRC_SDL
+set(UNIX_SOUND_SDL_SRC
     src/unix/sound_sdl.cpp
 )
 
diff --git a/build/cmake/init.cmake b/build/cmake/init.cmake
index 292440380f..b5b207924a 100644
--- a/build/cmake/init.cmake
+++ b/build/cmake/init.cmake
@@ -223,12 +223,39 @@ if(wxUSE_GUI)
         endif()
     endif()
 
-    if(wxUSE_WEBVIEW AND WXGTK)
-        find_package(LibSoup)
-        find_package(Webkit)
-        if(NOT WEBKIT_FOUND OR NOT LIBSOUP_FOUND)
-            message(WARNING "webkit not found, wxWebview won't be available")
-            wx_option_force_value(wxUSE_WEBVIEW OFF)
+    if(wxUSE_WEBVIEW)
+        if(WXGTK)
+            if(wxUSE_WEBVIEW_WEBKIT)
+                find_package(LibSoup)
+                if(WXGTK2)
+                    find_package(Webkit 1.0)
+                elseif(WXGTK3)
+                    find_package(Webkit2)
+                    if(NOT WEBKIT2_FOUND)
+                        find_package(Webkit 3.0)
+                    endif()
+                endif()
+            endif()
+            set(wxUSE_WEBVIEW_WEBKIT OFF)
+            set(wxUSE_WEBVIEW_WEBKIT2 OFF)
+            if(WEBKIT_FOUND AND LIBSOUP_FOUND)
+                set(wxUSE_WEBVIEW_WEBKIT ON)
+            elseif(WEBKIT2_FOUND AND LIBSOUP_FOUND)
+                set(wxUSE_WEBVIEW_WEBKIT2 ON)
+            else()
+                message(WARNING "webkit not found or enabled, wxWebview won't be available")
+                wx_option_force_value(wxUSE_WEBVIEW OFF)
+            endif()
+        elseif(WXMSW)
+            if(NOT wxUSE_WEBVIEW_IE)
+                message(WARNING "WebviewIE not found or enabled, wxWebview won't be available")
+                wx_option_force_value(wxUSE_WEBVIEW OFF)
+            endif()
+        elseif(APPLE)
+            if(NOT wxUSE_WEBVIEW_WEBKIT)
+                message(WARNING "webkit not found or enabled, wxWebview won't be available")
+                wx_option_force_value(wxUSE_WEBVIEW OFF)
+            endif()
         endif()
     endif()
 
@@ -257,4 +284,15 @@ if(wxUSE_GUI)
             wx_option_force_value(wxUSE_MEDIACTRL OFF)
         endif()
     endif()
+
+    if(UNIX AND wxUSE_LIBSDL)
+        find_package(SDL2)
+        if(NOT SDL2_FOUND)
+            find_package(SDL)
+        endif()
+        if(NOT SDL2_FOUND AND NOT SDL_FOUND)
+            message(WARNING "SDL not found, SDL Audio back-end won't be available")
+            wx_option_force_value(wxUSE_LIBSDL OFF)
+        endif()
+    endif()
 endif()
diff --git a/build/cmake/install.cmake b/build/cmake/install.cmake
index 3e038c8fcf..734a2af88a 100644
--- a/build/cmake/install.cmake
+++ b/build/cmake/install.cmake
@@ -20,10 +20,32 @@ if(MSVC)
         DIRECTORY "${wxSOURCE_DIR}/include/msvc"
         DESTINATION "include")
 endif()
+
+# setup header and wx-config
 if(MSVC OR MINGW)
     wx_install(
         DIRECTORY "${wxSETUP_HEADER_PATH}"
         DESTINATION "lib${wxPLATFORM_LIB_DIR}")
+elseif(UNIX)
+    wx_install(
+        DIRECTORY "${wxSETUP_HEADER_PATH}"
+        DESTINATION "lib/wx/include")
+
+    wx_install(
+        FILES "${wxOUTPUT_DIR}/wx/config/${wxBUILD_FILE_ID}"
+        DESTINATION "lib/wx/config"
+        PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ
+                    GROUP_EXECUTE GROUP_READ
+                    WORLD_EXECUTE WORLD_READ
+        )
+
+    install(DIRECTORY DESTINATION "bin")
+    install(CODE "execute_process( \
+        COMMAND ${CMAKE_COMMAND} -E create_symlink \
+        ${CMAKE_INSTALL_PREFIX}/lib/wx/config/${wxBUILD_FILE_ID} \
+        ${CMAKE_INSTALL_PREFIX}/bin/wx-config \
+        )"
+    )
 endif()
 
 # uninstall target
@@ -34,6 +56,12 @@ else()
 endif()
 
 if(NOT TARGET ${UNINST_NAME})
+    # these files are not added to the install manifest
+    set(WX_EXTRA_UNINSTALL_FILES
+        "${CMAKE_INSTALL_PREFIX}/bin/wx-config"
+        "${CMAKE_INSTALL_PREFIX}/bin/wxrc-${wxMAJOR_VERSION}.${wxMINOR_VERSION}"
+        )
+
     configure_file(
         "${wxSOURCE_DIR}/build/cmake/uninstall.cmake.in"
         "${wxBINARY_DIR}/uninstall.cmake"
diff --git a/build/cmake/lib/base/CMakeLists.txt b/build/cmake/lib/base/CMakeLists.txt
index 0cf6a46860..8f526afebe 100644
--- a/build/cmake/lib/base/CMakeLists.txt
+++ b/build/cmake/lib/base/CMakeLists.txt
@@ -31,8 +31,8 @@ wx_add_library(base IS_BASE ${BASE_FILES})
 if(NOT wxBUILD_MONOLITHIC)
     wx_lib_compile_definitions(base PRIVATE wxUSE_BASE=1)
 endif()
-if(wxUSE_ZLIB)
 
+if(wxUSE_ZLIB)
     wx_lib_include_directories(base PRIVATE ${ZLIB_INCLUDE_DIRS})
     wx_lib_link_libraries(base PRIVATE ${ZLIB_LIBRARIES})
 endif()
@@ -48,7 +48,7 @@ if(UNIX AND wxUSE_SECRETSTORE)
     wx_lib_include_directories(base PRIVATE ${LIBSECRET_INCLUDE_DIRS})
     wx_lib_link_libraries(base PRIVATE ${LIBSECRET_LIBRARIES})
 endif()
-if(wxUSE_LIBICONV AND ICONV_LIBRARIES)
+if(wxUSE_LIBICONV AND ICONV_FOUND)
     wx_lib_include_directories(base PRIVATE ${ICONV_INCLUDE_DIRS})
     wx_lib_link_libraries(base PRIVATE ${ICONV_LIBRARIES})
 endif()
diff --git a/build/cmake/lib/core/CMakeLists.txt b/build/cmake/lib/core/CMakeLists.txt
index e0a0a2a52e..54c2810051 100644
--- a/build/cmake/lib/core/CMakeLists.txt
+++ b/build/cmake/lib/core/CMakeLists.txt
@@ -15,6 +15,9 @@ if(WIN32)
     wx_append_sources(CORE_SRC BASE_AND_GUI_WIN32)
 elseif(UNIX)
     wx_append_sources(CORE_SRC UNIX)
+    if(wxUSE_LIBSDL)
+        wx_append_sources(CORE_SRC UNIX_SOUND_SDL)
+    endif()
 endif()
 
 if(WXMSW)
@@ -62,27 +65,26 @@ foreach(lib JPEG PNG TIFF)
 endforeach()
 
 if(WIN32)
-    wx_lib_link_libraries(core PRIVATE
-        winmm
-    )
+    wx_lib_link_libraries(core PRIVATE winmm)
 endif()
 if(WXOSX_COCOA)
-    wx_lib_link_libraries(core PUBLIC
-        "-framework AudioToolbox"
-        )
+    wx_lib_link_libraries(core PUBLIC "-framework AudioToolbox")
     if(wxUSE_WEBKIT)
-        wx_lib_link_libraries(core PUBLIC
-            "-framework WebKit"
-            )
+        wx_lib_link_libraries(core PUBLIC "-framework WebKit")
     endif()
 endif()
 if(WXGTK AND wxUSE_PRIVATE_FONTS)
-    wx_lib_include_directories(core PUBLIC
-        ${FONTCONFIG_INCLUDE_DIR}
-    )
-    wx_lib_link_libraries(core PUBLIC
-        ${FONTCONFIG_LIBRARIES}
-    )
+    wx_lib_include_directories(core PUBLIC ${FONTCONFIG_INCLUDE_DIR})
+    wx_lib_link_libraries(core PUBLIC ${FONTCONFIG_LIBRARIES})
+endif()
+if(UNIX AND wxUSE_LIBSDL)
+    if(SDL2_FOUND)
+        wx_lib_include_directories(core PUBLIC ${SDL2_INCLUDE_DIR})
+        wx_lib_link_libraries(core PUBLIC ${SDL2_LIBRARY})
+    elseif(SDL_FOUND)
+        wx_lib_include_directories(core PUBLIC ${SDL_INCLUDE_DIR})
+        wx_lib_link_libraries(core PUBLIC ${SDL_LIBRARY})
+    endif()
 endif()
 
 wx_finalize_lib(core)
diff --git a/build/cmake/lib/stc/CMakeLists.txt b/build/cmake/lib/stc/CMakeLists.txt
index 27af21bb79..8def395466 100644
--- a/build/cmake/lib/stc/CMakeLists.txt
+++ b/build/cmake/lib/stc/CMakeLists.txt
@@ -167,10 +167,10 @@ target_compile_definitions(wxscintilla PUBLIC
 
 if(wxBUILD_PRECOMP)
     # The auto-generated header causes undefined members and identifiers in the
-    # standard c++ headers when using clang on macOS or Windows.
+    # standard c++ headers when using clang.
     # Do not disable precompiled headers entirely but use the main Scintilla
     # header as prefix header so there is at least a small speedup.
-    if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" AND (APPLE OR WIN32))
+    if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
         set(wxSCINTILLA_PREC_HEADER "${wxSOURCE_DIR}/src/stc/scintilla/include/Scintilla.h")
     endif()
     wx_target_enable_precomp(wxscintilla ${wxSCINTILLA_PREC_HEADER})
diff --git a/build/cmake/lib/webview/CMakeLists.txt b/build/cmake/lib/webview/CMakeLists.txt
index 317bb1be62..ac4caca35e 100644
--- a/build/cmake/lib/webview/CMakeLists.txt
+++ b/build/cmake/lib/webview/CMakeLists.txt
@@ -14,25 +14,70 @@ wx_append_sources(WEBVIEW_FILES WEBVIEW_CMN)
 if(WXMSW)
     wx_append_sources(WEBVIEW_FILES WEBVIEW_MSW)
 elseif(WXGTK)
-    wx_append_sources(WEBVIEW_FILES WEBVIEW_GTK)
+    if(wxUSE_WEBVIEW_WEBKIT2)
+        wx_append_sources(WEBVIEW_FILES WEBVIEW2_GTK)
+    elseif(wxUSE_WEBVIEW_WEBKIT)
+        wx_append_sources(WEBVIEW_FILES WEBVIEW_GTK)
+    endif()
 elseif(APPLE)
     wx_append_sources(WEBVIEW_FILES WEBVIEW_OSX_SHARED)
 endif()
 
 wx_add_library(webview ${WEBVIEW_FILES})
-if(APPLE)
-    wx_lib_link_libraries(webview PUBLIC
-        "-framework WebKit"
-        )
-elseif(WXGTK)
-    wx_lib_include_directories(webview PUBLIC
-        ${WEBKIT_INCLUDE_DIR}
-        ${LIBSOUP_INCLUDE_DIRS}
-        )
-    wx_lib_link_libraries(webview PUBLIC
-        ${WEBKIT_LIBRARIES}
-        ${LIBSOUP_LIBRARIES}
+
+if(WXGTK AND wxUSE_WEBVIEW_WEBKIT2)
+    set(WX_WEB_EXTENSIONS_DIRECTORY "lib/wx/${wxMAJOR_VERSION}.${wxMINOR_VERSION}/web-extensions")
+    wx_lib_compile_definitions(webview PRIVATE
+        -DWX_WEB_EXTENSIONS_DIRECTORY="${CMAKE_INSTALL_PREFIX}/${WX_WEB_EXTENSIONS_DIRECTORY}"
         )
 endif()
 
+if(APPLE)
+    wx_lib_link_libraries(webview PUBLIC "-framework WebKit")
+elseif(WXGTK)
+    if(LIBSOUP_FOUND)
+        wx_lib_include_directories(webview PUBLIC ${LIBSOUP_INCLUDE_DIRS})
+        wx_lib_link_libraries(webview PUBLIC ${LIBSOUP_LIBRARIES})
+    endif()
+    if(wxUSE_WEBVIEW_WEBKIT2)
+        wx_lib_include_directories(webview PUBLIC ${WEBKIT2_INCLUDE_DIR})
+        wx_lib_link_libraries(webview PUBLIC ${WEBKIT2_LIBRARIES})
+    elseif(wxUSE_WEBVIEW_WEBKIT)
+        wx_lib_include_directories(webview PUBLIC ${WEBKIT_INCLUDE_DIR})
+        wx_lib_link_libraries(webview PUBLIC ${WEBKIT_LIBRARIES})
+    endif()
+endif()
+
 wx_finalize_lib(webview)
+
+# webkit extension plugin
+# we can't use (all of the) macros and functions because this library should
+# always be build as a shared libary, and not included in the monolithic build.
+if(WXGTK AND wxUSE_WEBVIEW_WEBKIT2)
+    wx_append_sources(WEBKIT2_EXT_FILES WEBVIEW_WEBKIT2_EXTENSION)
+    add_library(webkit2_ext SHARED ${WEBKIT2_EXT_FILES})
+    wx_set_target_properties(webkit2_ext false)
+
+    # Change output name to match expected name in webview_webkit2.cpp: webkit2_ext*
+    if(wxUSE_UNICODE)
+        set(lib_unicode u)
+    endif()
+    set_target_properties(webkit2_ext PROPERTIES PREFIX "")
+    set_target_properties(webkit2_ext PROPERTIES
+        OUTPUT_NAME "webkit2_ext${lib_unicode}-${wxMAJOR_VERSION}.${wxMINOR_VERSION}"
+        OUTPUT_NAME_DEBUG "webkit2_ext${lib_unicode}d-${wxMAJOR_VERSION}.${wxMINOR_VERSION}"
+        )
+
+    target_include_directories(webkit2_ext PUBLIC
+        ${LIBSOUP_INCLUDE_DIRS}
+        ${WEBKIT2_INCLUDE_DIR}
+        )
+    target_link_libraries(webkit2_ext PUBLIC
+        ${LIBSOUP_LIBRARIES}
+        ${WEBKIT2_LIBRARIES}
+        )
+
+    wx_install(TARGETS webkit2_ext LIBRARY DESTINATION ${WX_WEB_EXTENSIONS_DIRECTORY})
+
+    add_dependencies(webview webkit2_ext)
+endif()
diff --git a/build/cmake/lib/xml/CMakeLists.txt b/build/cmake/lib/xml/CMakeLists.txt
index 21173c5ad1..3eaae0b5d1 100644
--- a/build/cmake/lib/xml/CMakeLists.txt
+++ b/build/cmake/lib/xml/CMakeLists.txt
@@ -11,9 +11,7 @@ include(../../source_groups.cmake)
 
 wx_append_sources(XML_FILES XML)
 wx_add_library(xml IS_BASE ${XML_FILES})
-wx_lib_link_libraries(xml
-    PRIVATE ${EXPAT_LIBRARIES}
-    )
+wx_lib_link_libraries(xml PRIVATE ${EXPAT_LIBRARIES})
 wx_lib_include_directories(xml PRIVATE ${EXPAT_INCLUDE_DIRS})
 
 wx_finalize_lib(xml)
diff --git a/build/cmake/modules/FindSDL2.cmake b/build/cmake/modules/FindSDL2.cmake
new file mode 100644
index 0000000000..3878427d8c
--- /dev/null
+++ b/build/cmake/modules/FindSDL2.cmake
@@ -0,0 +1,175 @@
+
+# This module defines
+# SDL2_LIBRARY, the name of the library to link against
+# SDL2_FOUND, if false, do not try to link to SDL2
+# SDL2_INCLUDE_DIR, where to find SDL.h
+#
+# This module responds to the the flag:
+# SDL2_BUILDING_LIBRARY
+# If this is defined, then no SDL2main will be linked in because
+# only applications need main().
+# Otherwise, it is assumed you are building an application and this
+# module will attempt to locate and set the the proper link flags
+# as part of the returned SDL2_LIBRARY variable.
+#
+# Don't forget to include SDLmain.h and SDLmain.m your project for the
+# OS X framework based version. (Other versions link to -lSDL2main which
+# this module will try to find on your behalf.) Also for OS X, this
+# module will automatically add the -framework Cocoa on your behalf.
+#
+#
+# Additional Note: If you see an empty SDL2_LIBRARY_TEMP in your configuration
+# and no SDL2_LIBRARY, it means CMake did not find your SDL2 library
+# (SDL2.dll, libsdl2.so, SDL2.framework, etc).
+# Set SDL2_LIBRARY_TEMP to point to your SDL2 library, and configure again.
+# Similarly, if you see an empty SDL2MAIN_LIBRARY, you should set this value
+# as appropriate. These values are used to generate the final SDL2_LIBRARY
+# variable, but when these values are unset, SDL2_LIBRARY does not get created.
+#
+#
+# $SDL2DIR is an environment variable that would
+# correspond to the ./configure --prefix=$SDL2DIR
+# used in building SDL2.
+# l.e.galup  9-20-02
+#
+# Modified by Eric Wing.
+# Added code to assist with automated building by using environmental variables
+# and providing a more controlled/consistent search behavior.
+# Added new modifications to recognize OS X frameworks and
+# additional Unix paths (FreeBSD, etc).
+# Also corrected the header search path to follow "proper" SDL guidelines.
+# Added a search for SDL2main which is needed by some platforms.
+# Added a search for threads which is needed by some platforms.
+# Added needed compile switches for MinGW.
+#
+# On OSX, this will prefer the Framework version (if found) over others.
+# People will have to manually change the cache values of
+# SDL2_LIBRARY to override this selection or set the CMake environment
+# CMAKE_INCLUDE_PATH to modify the search paths.
+#
+# Note that the header path has changed from SDL2/SDL.h to just SDL.h
+# This needed to change because "proper" SDL convention
+# is #include "SDL.h", not <SDL2/SDL.h>. This is done for portability
+# reasons because not all systems place things in SDL2/ (see FreeBSD).
+
+#=============================================================================
+# Copyright 2003-2009 Kitware, Inc.
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+# message("<FindSDL2.cmake>")
+
+SET(SDL2_SEARCH_PATHS
+	~/Library/Frameworks
+	/Library/Frameworks
+	/usr/local
+	/usr
+	/sw # Fink
+	/opt/local # DarwinPorts
+	/opt/csw # Blastwave
+	/opt
+	${SDL2_PATH}
+)
+
+FIND_PATH(SDL2_INCLUDE_DIR SDL.h
+	HINTS
+	$ENV{SDL2DIR}
+	PATH_SUFFIXES include/SDL2 include
+	PATHS ${SDL2_SEARCH_PATHS}
+)
+
+if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+	set(PATH_SUFFIXES lib64 lib/x64 lib)
+else()
+	set(PATH_SUFFIXES lib/x86 lib)
+endif()
+
+FIND_LIBRARY(SDL2_LIBRARY_TEMP
+	NAMES SDL2
+	HINTS
+	$ENV{SDL2DIR}
+	PATH_SUFFIXES ${PATH_SUFFIXES}
+	PATHS ${SDL2_SEARCH_PATHS}
+)
+
+IF(NOT SDL2_BUILDING_LIBRARY)
+	IF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework")
+		# Non-OS X framework versions expect you to also dynamically link to
+		# SDL2main. This is mainly for Windows and OS X. Other (Unix) platforms
+		# seem to provide SDL2main for compatibility even though they don't
+		# necessarily need it.
+		FIND_LIBRARY(SDL2MAIN_LIBRARY
+			NAMES SDL2main
+			HINTS
+			$ENV{SDL2DIR}
+			PATH_SUFFIXES ${PATH_SUFFIXES}
+			PATHS ${SDL2_SEARCH_PATHS}
+		)
+	ENDIF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework")
+ENDIF(NOT SDL2_BUILDING_LIBRARY)
+
+# SDL2 may require threads on your system.
+# The Apple build may not need an explicit flag because one of the
+# frameworks may already provide it.
+# But for non-OSX systems, I will use the CMake Threads package.
+IF(NOT APPLE)
+	FIND_PACKAGE(Threads)
+ENDIF(NOT APPLE)
+
+# MinGW needs an additional link flag, -mwindows
+# It's total link flags should look like -lmingw32 -lSDL2main -lSDL2 -mwindows
+IF(MINGW)
+	SET(MINGW32_LIBRARY mingw32 "-mwindows" CACHE STRING "mwindows for MinGW")
+ENDIF(MINGW)
+
+IF(SDL2_LIBRARY_TEMP)
+	# For SDL2main
+	IF(NOT SDL2_BUILDING_LIBRARY)
+		IF(SDL2MAIN_LIBRARY)
+			SET(SDL2_LIBRARY_TEMP ${SDL2MAIN_LIBRARY} ${SDL2_LIBRARY_TEMP})
+		ENDIF(SDL2MAIN_LIBRARY)
+	ENDIF(NOT SDL2_BUILDING_LIBRARY)
+
+	# For OS X, SDL2 uses Cocoa as a backend so it must link to Cocoa.
+	# CMake doesn't display the -framework Cocoa string in the UI even
+	# though it actually is there if I modify a pre-used variable.
+	# I think it has something to do with the CACHE STRING.
+	# So I use a temporary variable until the end so I can set the
+	# "real" variable in one-shot.
+	IF(APPLE)
+		SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} "-framework Cocoa")
+	ENDIF(APPLE)
+
+	# For threads, as mentioned Apple doesn't need this.
+	# In fact, there seems to be a problem if I used the Threads package
+	# and try using this line, so I'm just skipping it entirely for OS X.
+	IF(NOT APPLE)
+		SET(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT})
+	ENDIF(NOT APPLE)
+
+	# For MinGW library
+	IF(MINGW)
+		SET(SDL2_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARY_TEMP})
+	ENDIF(MINGW)
+
+	# Set the final string here so the GUI reflects the final state.
+	SET(SDL2_LIBRARY ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL2 Library can be found")
+	# Set the temp variable to INTERNAL so it is not seen in the CMake GUI
+	SET(SDL2_LIBRARY_TEMP "${SDL2_LIBRARY_TEMP}" CACHE INTERNAL "")
+ENDIF(SDL2_LIBRARY_TEMP)
+
+# message("</FindSDL2.cmake>")
+
+INCLUDE(FindPackageHandleStandardArgs)
+
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2 REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR)
+
+MARK_AS_ADVANCED(SDL2MAIN_LIBRARY SDL2_LIBRARY SDL2_INCLUDE_DIR)
diff --git a/build/cmake/modules/FindWebkit.cmake b/build/cmake/modules/FindWebkit.cmake
index 1bb331cf69..8b6e6ccef7 100644
--- a/build/cmake/modules/FindWebkit.cmake
+++ b/build/cmake/modules/FindWebkit.cmake
@@ -1,16 +1,18 @@
-# - Find Webkit-3.0
-# Find the Webkit-3.0 includes and library
+# - Find Webkit
+# Find the Webkit includes and library
 #
 #  WEBKIT_INCLUDE_DIR - Where to find webkit include sub-directory.
-#  WEBKIT_LIBRARIES   - List of libraries when using Webkit-3.0.
-#  WEBKIT_FOUND       - True if Webkit-3.0 found.
+#  WEBKIT_LIBRARIES   - List of libraries when using Webkit.
+#  WEBKIT_FOUND       - True if Webkit found.
 
-SET( WEBKIT_VERSION "1.0")
+SET(WEBKIT_VERSION 1.0)
+if(DEFINED Webkit_FIND_VERSION)
+    SET(WEBKIT_VERSION ${Webkit_FIND_VERSION})
+endif()
 
-IF (WEBKIT_INCLUDE_DIR)
-    # Already in cache, be silent.
-    SET(WEBKIT_FIND_QUIETLY TRUE)
-ENDIF (WEBKIT_INCLUDE_DIR)
+SET(WEBKIT_INCLUDE_DIR WEBKIT_INCLUDE_DIR-NOTFOUND)
+SET(WEBKIT_LIBRARY WEBKIT_LIBRARY-NOTFOUND)
+SET(WEBKIT_LIBRARIES WEBKIT_LIBRARIES-NOTFOUND)
 
 FIND_PATH(WEBKIT_INCLUDE_DIR webkit/webkit.h
     PATH_SUFFIXES "webkitgtk-${WEBKIT_VERSION}"
@@ -35,4 +37,4 @@ ELSE(WEBKIT_FOUND)
     SET( WEBKIT_LIBRARIES )
 ENDIF(WEBKIT_FOUND)
 
-MARK_AS_ADVANCED( WEBKIT_LIBRARY WEBKIT_INCLUDE_DIR )
+MARK_AS_ADVANCED(WEBKIT_LIBRARY WEBKIT_LIBRARIES WEBKIT_INCLUDE_DIR)
diff --git a/build/cmake/modules/FindWebkit2.cmake b/build/cmake/modules/FindWebkit2.cmake
new file mode 100644
index 0000000000..33a8e4a863
--- /dev/null
+++ b/build/cmake/modules/FindWebkit2.cmake
@@ -0,0 +1,37 @@
+# - Find Webkit2
+# Find the Webkit2 includes and library
+#
+#  WEBKIT2_INCLUDE_DIR - Where to find Webkit2 include sub-directory.
+#  WEBKIT2_LIBRARIES   - List of libraries when using Webkit2.
+#  WEBKIT2_FOUND       - True if Webkit2 found.
+
+SET( WEBKIT2_VERSION 4.0)
+
+set(WEBKIT2_INCLUDE_DIR WEBKIT2_INCLUDE_DIR-NOTFOUND)
+set(WEBKIT2_LIBRARY WEBKIT2_LIBRARY-NOTFOUND)
+set(WEBKIT2_LIBRARIES WEBKIT2_LIBRARIES-NOTFOUND)
+
+FIND_PATH(WEBKIT2_INCLUDE_DIR webkit2/webkit2.h
+    PATH_SUFFIXES "webkitgtk-${WEBKIT2_VERSION}"
+)
+
+SET(WEBKIT2_NAMES "webkit2gtk-${WEBKIT2_VERSION}")
+FIND_LIBRARY(WEBKIT2_LIBRARY
+    NAMES ${WEBKIT2_NAMES}
+)
+
+# Handle the QUIETLY and REQUIRED arguments and set WEBKIT2_FOUND to
+# TRUE if all listed variables are TRUE.
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(
+    WEBKIT2 DEFAULT_MSG
+    WEBKIT2_LIBRARY WEBKIT2_INCLUDE_DIR
+)
+
+IF(WEBKIT2_FOUND)
+    SET( WEBKIT2_LIBRARIES ${WEBKIT2_LIBRARY} )
+ELSE(WEBKIT2_FOUND)
+    SET( WEBKIT2_LIBRARIES )
+ENDIF(WEBKIT2_FOUND)
+
+MARK_AS_ADVANCED(WEBKIT2_LIBRARY WEBKIT2_LIBRARIES WEBKIT2_INCLUDE_DIR)
diff --git a/build/cmake/options.cmake b/build/cmake/options.cmake
index 0cf3740002..1ea8458bda 100644
--- a/build/cmake/options.cmake
+++ b/build/cmake/options.cmake
@@ -74,6 +74,7 @@ wx_option(wxUSE_LIBLZMA "use LZMA compression" OFF)
 set(wxTHIRD_PARTY_LIBRARIES ${wxTHIRD_PARTY_LIBRARIES} wxUSE_LIBLZMA "use liblzma for LZMA compression")
 
 wx_option(wxUSE_OPENGL "use OpenGL (or Mesa)")
+wx_option(wxUSE_LIBSDL "use SDL for audio on Unix")
 
 if(NOT WIN32)
     wx_option(wxUSE_LIBICONV "use libiconv (character conversion)")
@@ -356,7 +357,6 @@ wx_option(wxUSE_DRAGIMAGE "use wxDragImage")
 wx_option(wxUSE_UIACTIONSIMULATOR "use wxUIActionSimulator (experimental)")
 wx_option(wxUSE_DC_TRANSFORM_MATRIX "use wxDC::SetTransformMatrix and related")
 wx_option(wxUSE_WEBVIEW_WEBKIT "use wxWebView WebKit backend")
-# TODO: wxUSE_WEBVIEW_WEBKIT2
 if(WIN32 OR APPLE)
     set(wxUSE_PRIVATE_FONTS_DEFAULT ON)
 else()
diff --git a/build/cmake/policies.cmake b/build/cmake/policies.cmake
index 46c35011a4..496aae7507 100644
--- a/build/cmake/policies.cmake
+++ b/build/cmake/policies.cmake
@@ -53,3 +53,8 @@ if(POLICY CMP0067)
     # Honor language standard in try_compile() source-file signature.
     cmake_policy(SET CMP0067 NEW)
 endif()
+
+if(POLICY CMP0072)
+    # FindOpenGL prefers GLVND by default when available.
+    cmake_policy(SET CMP0072 NEW)
+endif()
diff --git a/build/cmake/samples/CMakeLists.txt b/build/cmake/samples/CMakeLists.txt
index 47230283ba..2f8d28070a 100644
--- a/build/cmake/samples/CMakeLists.txt
+++ b/build/cmake/samples/CMakeLists.txt
@@ -152,7 +152,10 @@ wx_add_sample(typetest typetest.cpp typetest.h)
 wx_add_sample(uiaction DEPENDS wxUSE_UIACTIONSIMULATOR)
 wx_add_sample(validate validate.cpp validate.h DEPENDS wxUSE_VALIDATORS)
 wx_add_sample(vscroll vstest.cpp)
-wx_add_sample(webview LIBRARIES webview stc NAME webviewsample DEPENDS wxUSE_WEBVIEW)
+wx_add_sample(webview LIBRARIES webview NAME webviewsample DEPENDS wxUSE_WEBVIEW)
+if(TARGET webviewsample AND wxUSE_STC)
+    wx_exe_link_libraries(webviewsample stc)
+endif()
 # widgets Sample
 set(SAMPLE_WIDGETS_SRC
     activityindicator.cpp
diff --git a/build/cmake/uninstall.cmake.in b/build/cmake/uninstall.cmake.in
index b03059ad52..7d21a385d9 100644
--- a/build/cmake/uninstall.cmake.in
+++ b/build/cmake/uninstall.cmake.in
@@ -13,6 +13,7 @@ endif()
 
 file(READ "@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt" files)
 string(REGEX REPLACE "\n" ";" files "${files}")
+list(APPEND files @WX_EXTRA_UNINSTALL_FILES@)
 foreach(file ${files})
   message(STATUS "Uninstalling $ENV{DESTDIR}${file}")
   if(IS_SYMLINK "$ENV{DESTDIR}${file}" OR EXISTS "$ENV{DESTDIR}${file}")
diff --git a/build/cmake/utils/CMakeLists.txt b/build/cmake/utils/CMakeLists.txt
index bf29f72156..a242fdec66 100644
--- a/build/cmake/utils/CMakeLists.txt
+++ b/build/cmake/utils/CMakeLists.txt
@@ -17,8 +17,24 @@ if(wxUSE_XRC)
         wx_exe_link_libraries(wxrc xml)
     endif()
     wx_exe_link_libraries(wxrc base)
-    # TODO: install
+
     set_target_properties(wxrc PROPERTIES FOLDER "Utilities")
+
+    if(UNIX)
+        wx_install(TARGETS wxrc RUNTIME DESTINATION "bin")
+        install(CODE "execute_process( \
+            COMMAND ${CMAKE_COMMAND} -E rename \
+            ${CMAKE_INSTALL_PREFIX}/bin/wxrc \
+            ${CMAKE_INSTALL_PREFIX}/bin/wxrc-${wxMAJOR_VERSION}.${wxMINOR_VERSION} \
+            )"
+        )
+        install(CODE "execute_process( \
+            COMMAND ${CMAKE_COMMAND} -E create_symlink \
+            ${CMAKE_INSTALL_PREFIX}/bin/wxrc-${wxMAJOR_VERSION}.${wxMINOR_VERSION} \
+            ${CMAKE_INSTALL_PREFIX}/bin/wxrc \
+            )"
+        )
+    endif()
 endif()
 
 # TODO: build targets for other utils
diff --git a/build/files b/build/files
index 93c9fec7dd..d774633b94 100644
--- a/build/files
+++ b/build/files
@@ -2812,6 +2812,12 @@ WEBVIEW_GTK_HDR =
 WEBVIEW_GTK_SRC =
     src/gtk/webview_webkit.cpp
 
+WEBVIEW2_GTK_SRC =
+    src/gtk/webview_webkit2.cpp
+
+WEBVIEW_WEBKIT2_EXTENSION_SRC =
+    src/gtk/webview_webkit2_extension.cpp
+
 # wxXRC
 
 XRC_SRC =
@@ -2991,7 +2997,7 @@ OPENGL_OSX_SHARED_SRC =
 
 # Misc plugin sources:
 
-UNIX_SOUND_SRC_SDL =
+UNIX_SOUND_SDL_SRC =
     src/unix/sound_sdl.cpp
 
 # wxAUI
diff --git a/src/gtk/webview_webkit2.cpp b/src/gtk/webview_webkit2.cpp
index 81f9a9a667..656a10f778 100644
--- a/src/gtk/webview_webkit2.cpp
+++ b/src/gtk/webview_webkit2.cpp
@@ -407,13 +407,14 @@ wxgtk_initialize_web_extensions(WebKitWebContext *context,
     GVariant *user_data = g_variant_new("(s)", address);
 
     // The first value is the location in which the extension is supposed to be
-    // normally installed, while the other two are used as fallbacks to allow
+    // normally installed, while the other three are used as fallbacks to allow
     // running the tests and sample using wxWebView before installing it.
     const char* const directories[] =
     {
         WX_WEB_EXTENSIONS_DIRECTORY,
         "..",
         "../..",
+        "lib",
     };
 
     const char* dir = NULL;