From b626f1fd18e98b18a8ea1ac90fbf659cd23ee361 Mon Sep 17 00:00:00 2001
From: Campbell Barton <campbell@blender.org>
Date: Thu, 6 Apr 2023 07:40:07 +1000
Subject: [PATCH] Cleanup: use ".cc" & ".hh" extensions for intern/ghost

---
 intern/ghost/CMakeLists.txt                   | 286 +++++++++---------
 .../{GHOST_IContext.h => GHOST_IContext.hh}   |   0
 .../ghost/{GHOST_IEvent.h => GHOST_IEvent.hh} |   0
 ...ventConsumer.h => GHOST_IEventConsumer.hh} |   2 +-
 .../{GHOST_ISystem.h => GHOST_ISystem.hh}     |  18 +-
 ...T_ISystemPaths.h => GHOST_ISystemPaths.hh} |   0
 ...GHOST_ITimerTask.h => GHOST_ITimerTask.hh} |   0
 .../{GHOST_IWindow.h => GHOST_IWindow.hh}     |   2 +-
 ...GHOST_IXrContext.h => GHOST_IXrContext.hh} |   0
 .../{GHOST_Path-api.h => GHOST_Path-api.hh}   |   0
 intern/ghost/{GHOST_Rect.h => GHOST_Rect.hh}  |   0
 .../{GHOST_Buttons.cpp => GHOST_Buttons.cc}   |   2 +-
 .../{GHOST_Buttons.h => GHOST_Buttons.hh}     |   0
 .../{GHOST_C-api.cpp => GHOST_C-api.cc}       |  16 +-
 ...mer.cpp => GHOST_CallbackEventConsumer.cc} |   4 +-
 ...sumer.h => GHOST_CallbackEventConsumer.hh} |   2 +-
 .../{GHOST_Context.cpp => GHOST_Context.cc}   |   2 +-
 .../{GHOST_Context.h => GHOST_Context.hh}     |   2 +-
 ...GHOST_ContextCGL.h => GHOST_ContextCGL.hh} |   2 +-
 intern/ghost/intern/GHOST_ContextCGL.mm       |   2 +-
 ...OST_ContextD3D.cpp => GHOST_ContextD3D.cc} |   4 +-
 ...GHOST_ContextD3D.h => GHOST_ContextD3D.hh} |   2 +-
 ...OST_ContextEGL.cpp => GHOST_ContextEGL.cc} |   2 +-
 ...GHOST_ContextEGL.h => GHOST_ContextEGL.hh} |   4 +-
 ...OST_ContextGLX.cpp => GHOST_ContextGLX.cc} |   4 +-
 ...GHOST_ContextGLX.h => GHOST_ContextGLX.hh} |   2 +-
 ...T_ContextNone.cpp => GHOST_ContextNone.cc} |   2 +-
 ...OST_ContextNone.h => GHOST_ContextNone.hh} |   2 +-
 ...OST_ContextSDL.cpp => GHOST_ContextSDL.cc} |   2 +-
 ...GHOST_ContextSDL.h => GHOST_ContextSDL.hh} |   2 +-
 ...GHOST_ContextVK.cpp => GHOST_ContextVK.cc} |   2 +-
 .../{GHOST_ContextVK.h => GHOST_ContextVK.hh} |  10 +-
 ...OST_ContextWGL.cpp => GHOST_ContextWGL.cc} |   2 +-
 ...GHOST_ContextWGL.h => GHOST_ContextWGL.hh} |   2 +-
 .../intern/{GHOST_Debug.h => GHOST_Debug.hh}  |   0
 ...layManager.cpp => GHOST_DisplayManager.cc} |   4 +-
 ...splayManager.h => GHOST_DisplayManager.hh} |   0
 ...erCocoa.h => GHOST_DisplayManagerCocoa.hh} |   2 +-
 .../ghost/intern/GHOST_DisplayManagerCocoa.mm |   4 +-
 ...agerNULL.h => GHOST_DisplayManagerNULL.hh} |   4 +-
 ...agerSDL.cpp => GHOST_DisplayManagerSDL.cc} |   6 +-
 ...anagerSDL.h => GHOST_DisplayManagerSDL.hh} |   2 +-
 ...Win32.cpp => GHOST_DisplayManagerWin32.cc} |   4 +-
 ...erWin32.h => GHOST_DisplayManagerWin32.hh} |   2 +-
 ...agerX11.cpp => GHOST_DisplayManagerX11.cc} |   4 +-
 ...anagerX11.h => GHOST_DisplayManagerX11.hh} |   2 +-
 ...rgetWin32.cpp => GHOST_DropTargetWin32.cc} |   4 +-
 ...TargetWin32.h => GHOST_DropTargetWin32.hh} |   4 +-
 ...opTargetX11.cpp => GHOST_DropTargetX11.cc} |   8 +-
 ...DropTargetX11.h => GHOST_DropTargetX11.hh} |   4 +-
 .../intern/{GHOST_Event.h => GHOST_Event.hh}  |   2 +-
 ...OST_EventButton.h => GHOST_EventButton.hh} |   4 +-
 ...OST_EventCursor.h => GHOST_EventCursor.hh} |   2 +-
 ...entDragnDrop.h => GHOST_EventDragnDrop.hh} |   2 +-
 .../{GHOST_EventKey.h => GHOST_EventKey.hh}   |   2 +-
 ...EventManager.cpp => GHOST_EventManager.cc} |   4 +-
 ...T_EventManager.h => GHOST_EventManager.hh} |   2 +-
 .../{GHOST_EventNDOF.h => GHOST_EventNDOF.hh} |   2 +-
 ...EventPrinter.cpp => GHOST_EventPrinter.cc} |   8 +-
 ...T_EventPrinter.h => GHOST_EventPrinter.hh} |   2 +-
 ...OST_EventString.h => GHOST_EventString.hh} |   2 +-
 ...EventTrackpad.h => GHOST_EventTrackpad.hh} |   2 +-
 ...GHOST_EventWheel.h => GHOST_EventWheel.hh} |   2 +-
 .../{GHOST_ISystem.cpp => GHOST_ISystem.cc}   |  18 +-
 ...ISystemPaths.cpp => GHOST_ISystemPaths.cc} |   8 +-
 ...sBinding.h => GHOST_IXrGraphicsBinding.hh} |   2 +-
 .../{GHOST_IconX11.h => GHOST_IconX11.hh}     |   0
 .../{GHOST_ImeWin32.cpp => GHOST_ImeWin32.cc} |   4 +-
 .../{GHOST_ImeWin32.h => GHOST_ImeWin32.hh}   |   4 +-
 ...ModifierKeys.cpp => GHOST_ModifierKeys.cc} |   4 +-
 ...T_ModifierKeys.h => GHOST_ModifierKeys.hh} |   0
 ...T_NDOFManager.cpp => GHOST_NDOFManager.cc} |  12 +-
 ...OST_NDOFManager.h => GHOST_NDOFManager.hh} |   2 +-
 ...nagerCocoa.h => GHOST_NDOFManagerCocoa.hh} |   2 +-
 intern/ghost/intern/GHOST_NDOFManagerCocoa.mm |   4 +-
 ...nagerUnix.cpp => GHOST_NDOFManagerUnix.cc} |   4 +-
 ...ManagerUnix.h => GHOST_NDOFManagerUnix.hh} |   2 +-
 ...gerWin32.cpp => GHOST_NDOFManagerWin32.cc} |   2 +-
 ...nagerWin32.h => GHOST_NDOFManagerWin32.hh} |   2 +-
 .../{GHOST_Path-api.cpp => GHOST_Path-api.cc} |   6 +-
 ...GHOST_PathUtils.cpp => GHOST_PathUtils.cc} |   2 +-
 .../{GHOST_PathUtils.h => GHOST_PathUtils.hh} |   0
 .../intern/{GHOST_Rect.cpp => GHOST_Rect.cc}  |   2 +-
 .../{GHOST_System.cpp => GHOST_System.cc}     |  14 +-
 .../{GHOST_System.h => GHOST_System.hh}       |  12 +-
 ...OST_SystemCocoa.h => GHOST_SystemCocoa.hh} |   2 +-
 intern/ghost/intern/GHOST_SystemCocoa.mm      |  32 +-
 ...stemHeadless.h => GHOST_SystemHeadless.hh} |  10 +-
 ...OST_SystemPaths.h => GHOST_SystemPaths.hh} |   2 +-
 ...PathsCocoa.h => GHOST_SystemPathsCocoa.hh} |   2 +-
 intern/ghost/intern/GHOST_SystemPathsCocoa.mm |   4 +-
 ...PathsUnix.cpp => GHOST_SystemPathsUnix.cc} |   4 +-
 ...emPathsUnix.h => GHOST_SystemPathsUnix.hh} |   2 +-
 ...thsWin32.cpp => GHOST_SystemPathsWin32.cc} |   4 +-
 ...PathsWin32.h => GHOST_SystemPathsWin32.hh} |   2 +-
 ...GHOST_SystemSDL.cpp => GHOST_SystemSDL.cc} |  16 +-
 .../{GHOST_SystemSDL.h => GHOST_SystemSDL.hh} |  10 +-
 ...stemWayland.cpp => GHOST_SystemWayland.cc} |  36 +--
 ...SystemWayland.h => GHOST_SystemWayland.hh} |   4 +-
 ...T_SystemWin32.cpp => GHOST_SystemWin32.cc} |  32 +-
 ...OST_SystemWin32.h => GHOST_SystemWin32.hh} |   2 +-
 ...GHOST_SystemX11.cpp => GHOST_SystemX11.cc} |  36 +--
 .../{GHOST_SystemX11.h => GHOST_SystemX11.hh} |   2 +-
 ...T_TaskbarWin32.h => GHOST_TaskbarWin32.hh} |   0
 ...OST_TaskbarX11.cpp => GHOST_TaskbarX11.cc} |   2 +-
 ...GHOST_TaskbarX11.h => GHOST_TaskbarX11.hh} |   0
 ...TimerManager.cpp => GHOST_TimerManager.cc} |   4 +-
 ...T_TimerManager.h => GHOST_TimerManager.hh} |   0
 .../{GHOST_TimerTask.h => GHOST_TimerTask.hh} |   2 +-
 ...ackpadWin32.cpp => GHOST_TrackpadWin32.cc} |   4 +-
 ...TrackpadWin32.h => GHOST_TrackpadWin32.hh} |   0
 .../intern/{GHOST_Util.h => GHOST_Util.hh}    |   0
 ...tings.h => GHOST_WaylandCursorSettings.hh} |   0
 ...T_WaylandUtils.h => GHOST_WaylandUtils.hh} |   0
 .../{GHOST_Window.cpp => GHOST_Window.cc}     |   4 +-
 .../{GHOST_Window.h => GHOST_Window.hh}       |   2 +-
 ...OST_WindowCocoa.h => GHOST_WindowCocoa.hh} |   4 +-
 intern/ghost/intern/GHOST_WindowCocoa.mm      |  16 +-
 ...ndowManager.cpp => GHOST_WindowManager.cc} |   6 +-
 ...WindowManager.h => GHOST_WindowManager.hh} |   4 +-
 ...GHOST_WindowNULL.h => GHOST_WindowNULL.hh} |   2 +-
 ...GHOST_WindowSDL.cpp => GHOST_WindowSDL.cc} |   4 +-
 .../{GHOST_WindowSDL.h => GHOST_WindowSDL.hh} |   4 +-
 ...owViewCocoa.h => GHOST_WindowViewCocoa.hh} |   0
 ...ndowWayland.cpp => GHOST_WindowWayland.cc} |  18 +-
 ...WindowWayland.h => GHOST_WindowWayland.hh} |   2 +-
 ...T_WindowWin32.cpp => GHOST_WindowWin32.cc} |  16 +-
 ...OST_WindowWin32.h => GHOST_WindowWin32.hh} |  10 +-
 ...GHOST_WindowX11.cpp => GHOST_WindowX11.cc} |  18 +-
 .../{GHOST_WindowX11.h => GHOST_WindowX11.hh} |   6 +-
 .../{GHOST_Wintab.cpp => GHOST_Wintab.cc}     |   2 +-
 .../{GHOST_Wintab.h => GHOST_Wintab.hh}       |   0
 .../intern/{GHOST_Xr.cpp => GHOST_Xr.cc}      |   6 +-
 .../{GHOST_XrAction.cpp => GHOST_XrAction.cc} |   6 +-
 .../{GHOST_XrAction.h => GHOST_XrAction.hh}   |   2 +-
 ...GHOST_XrContext.cpp => GHOST_XrContext.cc} |   8 +-
 .../{GHOST_XrContext.h => GHOST_XrContext.hh} |   4 +-
 ...erModel.cpp => GHOST_XrControllerModel.cc} |   6 +-
 ...llerModel.h => GHOST_XrControllerModel.hh} |   0
 .../{GHOST_XrEvent.cpp => GHOST_XrEvent.cc}   |   4 +-
 ...OST_XrException.h => GHOST_XrException.hh} |   0
 ...Binding.cpp => GHOST_XrGraphicsBinding.cc} |  22 +-
 ...GHOST_XrSession.cpp => GHOST_XrSession.cc} |  16 +-
 .../{GHOST_XrSession.h => GHOST_XrSession.hh} |   2 +-
 ...T_XrSwapchain.cpp => GHOST_XrSwapchain.cc} |  10 +-
 ...OST_XrSwapchain.h => GHOST_XrSwapchain.hh} |   0
 .../{GHOST_Xr_intern.h => GHOST_Xr_intern.hh} |   2 +-
 ...includes.h => GHOST_Xr_openxr_includes.hh} |   0
 ...OST_utildefines.h => GHOST_utildefines.hh} |   2 +-
 ...riadic.h => GHOST_utildefines_variadic.hh} |   0
 intern/ghost/test/gears/GHOST_Test.cpp        |   8 +-
 source/blender/blenkernel/intern/appdir.c     |   2 +-
 .../blender/blenkernel/intern/layer_test.cc   |   2 +-
 .../tests/blendfile_loading_base_test.cc      |   2 +-
 .../blender/gpu/metal/mtl_command_buffer.mm   |   2 +-
 source/blender/gpu/metal/mtl_context.hh       |   6 +-
 .../blender/windowmanager/intern/wm_files.cc  |   2 +-
 .../windowmanager/intern/wm_init_exit.cc      |   2 +-
 source/blender/windowmanager/wm_event_types.h |   2 +-
 159 files changed, 514 insertions(+), 514 deletions(-)
 rename intern/ghost/{GHOST_IContext.h => GHOST_IContext.hh} (100%)
 rename intern/ghost/{GHOST_IEvent.h => GHOST_IEvent.hh} (100%)
 rename intern/ghost/{GHOST_IEventConsumer.h => GHOST_IEventConsumer.hh} (97%)
 rename intern/ghost/{GHOST_ISystem.h => GHOST_ISystem.hh} (98%)
 rename intern/ghost/{GHOST_ISystemPaths.h => GHOST_ISystemPaths.hh} (100%)
 rename intern/ghost/{GHOST_ITimerTask.h => GHOST_ITimerTask.hh} (100%)
 rename intern/ghost/{GHOST_IWindow.h => GHOST_IWindow.hh} (99%)
 rename intern/ghost/{GHOST_IXrContext.h => GHOST_IXrContext.hh} (100%)
 rename intern/ghost/{GHOST_Path-api.h => GHOST_Path-api.hh} (100%)
 rename intern/ghost/{GHOST_Rect.h => GHOST_Rect.hh} (100%)
 rename intern/ghost/intern/{GHOST_Buttons.cpp => GHOST_Buttons.cc} (98%)
 rename intern/ghost/intern/{GHOST_Buttons.h => GHOST_Buttons.hh} (100%)
 rename intern/ghost/intern/{GHOST_C-api.cpp => GHOST_C-api.cc} (99%)
 rename intern/ghost/intern/{GHOST_CallbackEventConsumer.cpp => GHOST_CallbackEventConsumer.cc} (89%)
 rename intern/ghost/intern/{GHOST_CallbackEventConsumer.h => GHOST_CallbackEventConsumer.hh} (97%)
 rename intern/ghost/intern/{GHOST_Context.cpp => GHOST_Context.cc} (99%)
 rename intern/ghost/intern/{GHOST_Context.h => GHOST_Context.hh} (99%)
 rename intern/ghost/intern/{GHOST_ContextCGL.h => GHOST_ContextCGL.hh} (99%)
 rename intern/ghost/intern/{GHOST_ContextD3D.cpp => GHOST_ContextD3D.cc} (99%)
 rename intern/ghost/intern/{GHOST_ContextD3D.h => GHOST_ContextD3D.hh} (99%)
 rename intern/ghost/intern/{GHOST_ContextEGL.cpp => GHOST_ContextEGL.cc} (99%)
 rename intern/ghost/intern/{GHOST_ContextEGL.h => GHOST_ContextEGL.hh} (98%)
 rename intern/ghost/intern/{GHOST_ContextGLX.cpp => GHOST_ContextGLX.cc} (99%)
 rename intern/ghost/intern/{GHOST_ContextGLX.h => GHOST_ContextGLX.hh} (99%)
 rename intern/ghost/intern/{GHOST_ContextNone.cpp => GHOST_ContextNone.cc} (96%)
 rename intern/ghost/intern/{GHOST_ContextNone.h => GHOST_ContextNone.hh} (97%)
 rename intern/ghost/intern/{GHOST_ContextSDL.cpp => GHOST_ContextSDL.cc} (99%)
 rename intern/ghost/intern/{GHOST_ContextSDL.h => GHOST_ContextSDL.hh} (99%)
 rename intern/ghost/intern/{GHOST_ContextVK.cpp => GHOST_ContextVK.cc} (99%)
 rename intern/ghost/intern/{GHOST_ContextVK.h => GHOST_ContextVK.hh} (97%)
 rename intern/ghost/intern/{GHOST_ContextWGL.cpp => GHOST_ContextWGL.cc} (99%)
 rename intern/ghost/intern/{GHOST_ContextWGL.h => GHOST_ContextWGL.hh} (99%)
 rename intern/ghost/intern/{GHOST_Debug.h => GHOST_Debug.hh} (100%)
 rename intern/ghost/intern/{GHOST_DisplayManager.cpp => GHOST_DisplayManager.cc} (98%)
 rename intern/ghost/intern/{GHOST_DisplayManager.h => GHOST_DisplayManager.hh} (100%)
 rename intern/ghost/intern/{GHOST_DisplayManagerCocoa.h => GHOST_DisplayManagerCocoa.hh} (98%)
 rename intern/ghost/intern/{GHOST_DisplayManagerNULL.h => GHOST_DisplayManagerNULL.hh} (94%)
 rename intern/ghost/intern/{GHOST_DisplayManagerSDL.cpp => GHOST_DisplayManagerSDL.cc} (97%)
 rename intern/ghost/intern/{GHOST_DisplayManagerSDL.h => GHOST_DisplayManagerSDL.hh} (96%)
 rename intern/ghost/intern/{GHOST_DisplayManagerWin32.cpp => GHOST_DisplayManagerWin32.cc} (98%)
 rename intern/ghost/intern/{GHOST_DisplayManagerWin32.h => GHOST_DisplayManagerWin32.hh} (98%)
 rename intern/ghost/intern/{GHOST_DisplayManagerX11.cpp => GHOST_DisplayManagerX11.cc} (98%)
 rename intern/ghost/intern/{GHOST_DisplayManagerX11.h => GHOST_DisplayManagerX11.hh} (98%)
 rename intern/ghost/intern/{GHOST_DropTargetWin32.cpp => GHOST_DropTargetWin32.cc} (99%)
 rename intern/ghost/intern/{GHOST_DropTargetWin32.h => GHOST_DropTargetWin32.hh} (98%)
 rename intern/ghost/intern/{GHOST_DropTargetX11.cpp => GHOST_DropTargetX11.cc} (97%)
 rename intern/ghost/intern/{GHOST_DropTargetX11.h => GHOST_DropTargetX11.hh} (97%)
 rename intern/ghost/intern/{GHOST_Event.h => GHOST_Event.hh} (98%)
 rename intern/ghost/intern/{GHOST_EventButton.h => GHOST_EventButton.hh} (95%)
 rename intern/ghost/intern/{GHOST_EventCursor.h => GHOST_EventCursor.hh} (97%)
 rename intern/ghost/intern/{GHOST_EventDragnDrop.h => GHOST_EventDragnDrop.hh} (99%)
 rename intern/ghost/intern/{GHOST_EventKey.h => GHOST_EventKey.hh} (98%)
 rename intern/ghost/intern/{GHOST_EventManager.cpp => GHOST_EventManager.cc} (98%)
 rename intern/ghost/intern/{GHOST_EventManager.h => GHOST_EventManager.hh} (98%)
 rename intern/ghost/intern/{GHOST_EventNDOF.h => GHOST_EventNDOF.hh} (96%)
 rename intern/ghost/intern/{GHOST_EventPrinter.cpp => GHOST_EventPrinter.cc} (98%)
 rename intern/ghost/intern/{GHOST_EventPrinter.h => GHOST_EventPrinter.hh} (96%)
 rename intern/ghost/intern/{GHOST_EventString.h => GHOST_EventString.hh} (97%)
 rename intern/ghost/intern/{GHOST_EventTrackpad.h => GHOST_EventTrackpad.hh} (98%)
 rename intern/ghost/intern/{GHOST_EventWheel.h => GHOST_EventWheel.hh} (97%)
 rename intern/ghost/intern/{GHOST_ISystem.cpp => GHOST_ISystem.cc} (94%)
 rename intern/ghost/intern/{GHOST_ISystemPaths.cpp => GHOST_ISystemPaths.cc} (88%)
 rename intern/ghost/intern/{GHOST_IXrGraphicsBinding.h => GHOST_IXrGraphicsBinding.hh} (98%)
 rename intern/ghost/intern/{GHOST_IconX11.h => GHOST_IconX11.hh} (100%)
 rename intern/ghost/intern/{GHOST_ImeWin32.cpp => GHOST_ImeWin32.cc} (99%)
 rename intern/ghost/intern/{GHOST_ImeWin32.h => GHOST_ImeWin32.hh} (99%)
 rename intern/ghost/intern/{GHOST_ModifierKeys.cpp => GHOST_ModifierKeys.cc} (98%)
 rename intern/ghost/intern/{GHOST_ModifierKeys.h => GHOST_ModifierKeys.hh} (100%)
 rename intern/ghost/intern/{GHOST_NDOFManager.cpp => GHOST_NDOFManager.cc} (99%)
 rename intern/ghost/intern/{GHOST_NDOFManager.h => GHOST_NDOFManager.hh} (99%)
 rename intern/ghost/intern/{GHOST_NDOFManagerCocoa.h => GHOST_NDOFManagerCocoa.hh} (91%)
 rename intern/ghost/intern/{GHOST_NDOFManagerUnix.cpp => GHOST_NDOFManagerUnix.cc} (98%)
 rename intern/ghost/intern/{GHOST_NDOFManagerUnix.h => GHOST_NDOFManagerUnix.hh} (92%)
 rename intern/ghost/intern/{GHOST_NDOFManagerWin32.cpp => GHOST_NDOFManagerWin32.cc} (91%)
 rename intern/ghost/intern/{GHOST_NDOFManagerWin32.h => GHOST_NDOFManagerWin32.hh} (85%)
 rename intern/ghost/intern/{GHOST_Path-api.cpp => GHOST_Path-api.cc} (93%)
 rename intern/ghost/intern/{GHOST_PathUtils.cpp => GHOST_PathUtils.cc} (98%)
 rename intern/ghost/intern/{GHOST_PathUtils.h => GHOST_PathUtils.hh} (100%)
 rename intern/ghost/intern/{GHOST_Rect.cpp => GHOST_Rect.cc} (98%)
 rename intern/ghost/intern/{GHOST_System.cpp => GHOST_System.cc} (98%)
 rename intern/ghost/intern/{GHOST_System.h => GHOST_System.hh} (98%)
 rename intern/ghost/intern/{GHOST_SystemCocoa.h => GHOST_SystemCocoa.hh} (99%)
 rename intern/ghost/intern/{GHOST_SystemHeadless.h => GHOST_SystemHeadless.hh} (96%)
 rename intern/ghost/intern/{GHOST_SystemPaths.h => GHOST_SystemPaths.hh} (97%)
 rename intern/ghost/intern/{GHOST_SystemPathsCocoa.h => GHOST_SystemPathsCocoa.hh} (97%)
 rename intern/ghost/intern/{GHOST_SystemPathsUnix.cpp => GHOST_SystemPathsUnix.cc} (98%)
 rename intern/ghost/intern/{GHOST_SystemPathsUnix.h => GHOST_SystemPathsUnix.hh} (98%)
 rename intern/ghost/intern/{GHOST_SystemPathsWin32.cpp => GHOST_SystemPathsWin32.cc} (98%)
 rename intern/ghost/intern/{GHOST_SystemPathsWin32.h => GHOST_SystemPathsWin32.hh} (98%)
 rename intern/ghost/intern/{GHOST_SystemSDL.cpp => GHOST_SystemSDL.cc} (98%)
 rename intern/ghost/intern/{GHOST_SystemSDL.h => GHOST_SystemSDL.hh} (93%)
 rename intern/ghost/intern/{GHOST_SystemWayland.cpp => GHOST_SystemWayland.cc} (99%)
 rename intern/ghost/intern/{GHOST_SystemWayland.h => GHOST_SystemWayland.hh} (99%)
 rename intern/ghost/intern/{GHOST_SystemWin32.cpp => GHOST_SystemWin32.cc} (99%)
 rename intern/ghost/intern/{GHOST_SystemWin32.h => GHOST_SystemWin32.hh} (99%)
 rename intern/ghost/intern/{GHOST_SystemX11.cpp => GHOST_SystemX11.cc} (99%)
 rename intern/ghost/intern/{GHOST_SystemX11.h => GHOST_SystemX11.hh} (99%)
 rename intern/ghost/intern/{GHOST_TaskbarWin32.h => GHOST_TaskbarWin32.hh} (100%)
 rename intern/ghost/intern/{GHOST_TaskbarX11.cpp => GHOST_TaskbarX11.cc} (98%)
 rename intern/ghost/intern/{GHOST_TaskbarX11.h => GHOST_TaskbarX11.hh} (100%)
 rename intern/ghost/intern/{GHOST_TimerManager.cpp => GHOST_TimerManager.cc} (97%)
 rename intern/ghost/intern/{GHOST_TimerManager.h => GHOST_TimerManager.hh} (100%)
 rename intern/ghost/intern/{GHOST_TimerTask.h => GHOST_TimerTask.hh} (99%)
 rename intern/ghost/intern/{GHOST_TrackpadWin32.cpp => GHOST_TrackpadWin32.cc} (99%)
 rename intern/ghost/intern/{GHOST_TrackpadWin32.h => GHOST_TrackpadWin32.hh} (100%)
 rename intern/ghost/intern/{GHOST_Util.h => GHOST_Util.hh} (100%)
 rename intern/ghost/intern/{GHOST_WaylandCursorSettings.h => GHOST_WaylandCursorSettings.hh} (100%)
 rename intern/ghost/intern/{GHOST_WaylandUtils.h => GHOST_WaylandUtils.hh} (100%)
 rename intern/ghost/intern/{GHOST_Window.cpp => GHOST_Window.cc} (99%)
 rename intern/ghost/intern/{GHOST_Window.h => GHOST_Window.hh} (99%)
 rename intern/ghost/intern/{GHOST_WindowCocoa.h => GHOST_WindowCocoa.hh} (99%)
 rename intern/ghost/intern/{GHOST_WindowManager.cpp => GHOST_WindowManager.cc} (97%)
 rename intern/ghost/intern/{GHOST_WindowManager.h => GHOST_WindowManager.hh} (98%)
 rename intern/ghost/intern/{GHOST_WindowNULL.h => GHOST_WindowNULL.hh} (99%)
 rename intern/ghost/intern/{GHOST_WindowSDL.cpp => GHOST_WindowSDL.cc} (99%)
 rename intern/ghost/intern/{GHOST_WindowSDL.h => GHOST_WindowSDL.hh} (98%)
 rename intern/ghost/intern/{GHOST_WindowViewCocoa.h => GHOST_WindowViewCocoa.hh} (100%)
 rename intern/ghost/intern/{GHOST_WindowWayland.cpp => GHOST_WindowWayland.cc} (99%)
 rename intern/ghost/intern/{GHOST_WindowWayland.h => GHOST_WindowWayland.hh} (99%)
 rename intern/ghost/intern/{GHOST_WindowWin32.cpp => GHOST_WindowWin32.cc} (99%)
 rename intern/ghost/intern/{GHOST_WindowWin32.h => GHOST_WindowWin32.hh} (98%)
 rename intern/ghost/intern/{GHOST_WindowX11.cpp => GHOST_WindowX11.cc} (99%)
 rename intern/ghost/intern/{GHOST_WindowX11.h => GHOST_WindowX11.hh} (98%)
 rename intern/ghost/intern/{GHOST_Wintab.cpp => GHOST_Wintab.cc} (99%)
 rename intern/ghost/intern/{GHOST_Wintab.h => GHOST_Wintab.hh} (100%)
 rename intern/ghost/intern/{GHOST_Xr.cpp => GHOST_Xr.cc} (91%)
 rename intern/ghost/intern/{GHOST_XrAction.cpp => GHOST_XrAction.cc} (99%)
 rename intern/ghost/intern/{GHOST_XrAction.h => GHOST_XrAction.hh} (99%)
 rename intern/ghost/intern/{GHOST_XrContext.cpp => GHOST_XrContext.cc} (99%)
 rename intern/ghost/intern/{GHOST_XrContext.h => GHOST_XrContext.hh} (98%)
 rename intern/ghost/intern/{GHOST_XrControllerModel.cpp => GHOST_XrControllerModel.cc} (99%)
 rename intern/ghost/intern/{GHOST_XrControllerModel.h => GHOST_XrControllerModel.hh} (100%)
 rename intern/ghost/intern/{GHOST_XrEvent.cpp => GHOST_XrEvent.cc} (95%)
 rename intern/ghost/intern/{GHOST_XrException.h => GHOST_XrException.hh} (100%)
 rename intern/ghost/intern/{GHOST_XrGraphicsBinding.cpp => GHOST_XrGraphicsBinding.cc} (98%)
 rename intern/ghost/intern/{GHOST_XrSession.cpp => GHOST_XrSession.cc} (99%)
 rename intern/ghost/intern/{GHOST_XrSession.h => GHOST_XrSession.hh} (99%)
 rename intern/ghost/intern/{GHOST_XrSwapchain.cpp => GHOST_XrSwapchain.cc} (96%)
 rename intern/ghost/intern/{GHOST_XrSwapchain.h => GHOST_XrSwapchain.hh} (100%)
 rename intern/ghost/intern/{GHOST_Xr_intern.h => GHOST_Xr_intern.hh} (97%)
 rename intern/ghost/intern/{GHOST_Xr_openxr_includes.h => GHOST_Xr_openxr_includes.hh} (100%)
 rename intern/ghost/intern/{GHOST_utildefines.h => GHOST_utildefines.hh} (99%)
 rename intern/ghost/intern/{GHOST_utildefines_variadic.h => GHOST_utildefines_variadic.hh} (100%)

diff --git a/intern/ghost/CMakeLists.txt b/intern/ghost/CMakeLists.txt
index f1b3ec87a83..b5d3c4f16a6 100644
--- a/intern/ghost/CMakeLists.txt
+++ b/intern/ghost/CMakeLists.txt
@@ -14,62 +14,62 @@ set(INC_SYS
 )
 
 set(SRC
-  intern/GHOST_Buttons.cpp
-  intern/GHOST_C-api.cpp
-  intern/GHOST_CallbackEventConsumer.cpp
-  intern/GHOST_Context.cpp
-  intern/GHOST_ContextNone.cpp
-  intern/GHOST_DisplayManager.cpp
-  intern/GHOST_EventManager.cpp
-  intern/GHOST_ISystem.cpp
-  intern/GHOST_ISystemPaths.cpp
-  intern/GHOST_ModifierKeys.cpp
-  intern/GHOST_Path-api.cpp
-  intern/GHOST_PathUtils.cpp
-  intern/GHOST_Rect.cpp
-  intern/GHOST_System.cpp
-  intern/GHOST_TimerManager.cpp
-  intern/GHOST_Window.cpp
-  intern/GHOST_WindowManager.cpp
+  intern/GHOST_Buttons.cc
+  intern/GHOST_C-api.cc
+  intern/GHOST_CallbackEventConsumer.cc
+  intern/GHOST_Context.cc
+  intern/GHOST_ContextNone.cc
+  intern/GHOST_DisplayManager.cc
+  intern/GHOST_EventManager.cc
+  intern/GHOST_ISystem.cc
+  intern/GHOST_ISystemPaths.cc
+  intern/GHOST_ModifierKeys.cc
+  intern/GHOST_Path-api.cc
+  intern/GHOST_PathUtils.cc
+  intern/GHOST_Rect.cc
+  intern/GHOST_System.cc
+  intern/GHOST_TimerManager.cc
+  intern/GHOST_Window.cc
+  intern/GHOST_WindowManager.cc
 
   GHOST_C-api.h
-  GHOST_IContext.h
-  GHOST_IEvent.h
-  GHOST_IEventConsumer.h
-  GHOST_ISystem.h
-  GHOST_ISystemPaths.h
-  GHOST_ITimerTask.h
-  GHOST_IWindow.h
-  GHOST_Path-api.h
-  GHOST_Rect.h
+  GHOST_IContext.hh
+  GHOST_IEvent.hh
+  GHOST_IEventConsumer.hh
+  GHOST_ISystem.hh
+  GHOST_ISystemPaths.hh
+  GHOST_ITimerTask.hh
+  GHOST_IWindow.hh
+  GHOST_Path-api.hh
+  GHOST_Rect.hh
   GHOST_Types.h
 
-  intern/GHOST_Buttons.h
-  intern/GHOST_CallbackEventConsumer.h
-  intern/GHOST_Context.h
-  intern/GHOST_ContextNone.h
-  intern/GHOST_Debug.h
-  intern/GHOST_DisplayManager.h
-  intern/GHOST_Event.h
-  intern/GHOST_EventButton.h
-  intern/GHOST_EventCursor.h
-  intern/GHOST_EventDragnDrop.h
-  intern/GHOST_EventKey.h
-  intern/GHOST_EventManager.h
-  intern/GHOST_EventString.h
-  intern/GHOST_EventTrackpad.h
-  intern/GHOST_EventWheel.h
-  intern/GHOST_ModifierKeys.h
-  intern/GHOST_PathUtils.h
-  intern/GHOST_System.h
-  intern/GHOST_SystemPaths.h
-  intern/GHOST_TimerManager.h
-  intern/GHOST_TimerTask.h
-  intern/GHOST_Util.h
-  intern/GHOST_Window.h
-  intern/GHOST_WindowManager.h
-  intern/GHOST_utildefines.h
-  intern/GHOST_utildefines_variadic.h
+  intern/GHOST_Buttons.hh
+  intern/GHOST_CallbackEventConsumer.hh
+  intern/GHOST_Context.hh
+  intern/GHOST_ContextNone.hh
+  intern/GHOST_Debug.hh
+  intern/GHOST_DisplayManager.hh
+  intern/GHOST_Event.hh
+  intern/GHOST_EventButton.hh
+  intern/GHOST_EventCursor.hh
+  intern/GHOST_EventDragnDrop.hh
+  intern/GHOST_EventKey.hh
+  intern/GHOST_EventManager.hh
+  intern/GHOST_EventString.hh
+  intern/GHOST_EventTrackpad.hh
+  intern/GHOST_EventWheel.hh
+  intern/GHOST_ModifierKeys.hh
+  intern/GHOST_PathUtils.hh
+  intern/GHOST_System.hh
+  intern/GHOST_SystemPaths.hh
+  intern/GHOST_TimerManager.hh
+  intern/GHOST_TimerTask.hh
+  intern/GHOST_Util.hh
+  intern/GHOST_Window.hh
+  intern/GHOST_WindowManager.hh
+  intern/GHOST_utildefines.hh
+  intern/GHOST_utildefines_variadic.hh
 )
 
 set(LIB
@@ -78,9 +78,9 @@ set(LIB
 
 if(WITH_VULKAN_BACKEND)
   list(APPEND SRC
-    intern/GHOST_ContextVK.cpp
+    intern/GHOST_ContextVK.cc
 
-    intern/GHOST_ContextVK.h
+    intern/GHOST_ContextVK.hh
   )
 
   list(APPEND INC_SYS
@@ -98,9 +98,9 @@ endif()
 
 if(WITH_GHOST_DEBUG)
   list(APPEND SRC
-    intern/GHOST_EventPrinter.cpp
+    intern/GHOST_EventPrinter.cc
 
-    intern/GHOST_EventPrinter.h
+    intern/GHOST_EventPrinter.hh
   )
   add_definitions(-DWITH_GHOST_DEBUG)
 endif()
@@ -109,10 +109,10 @@ if(WITH_INPUT_NDOF)
   add_definitions(-DWITH_INPUT_NDOF)
 
   list(APPEND SRC
-    intern/GHOST_NDOFManager.cpp
+    intern/GHOST_NDOFManager.cc
 
-    intern/GHOST_EventNDOF.h
-    intern/GHOST_NDOFManager.h
+    intern/GHOST_EventNDOF.hh
+    intern/GHOST_NDOFManager.hh
   )
 
   list(APPEND INC_SYS
@@ -124,24 +124,24 @@ if(WITH_INPUT_NDOF)
 endif()
 
 list(APPEND SRC
-  intern/GHOST_DisplayManagerNULL.h
-  intern/GHOST_SystemHeadless.h
-  intern/GHOST_WindowNULL.h
+  intern/GHOST_DisplayManagerNULL.hh
+  intern/GHOST_SystemHeadless.hh
+  intern/GHOST_WindowNULL.hh
 )
 
 if(WITH_HEADLESS)
   add_definitions(-DWITH_HEADLESS)
 elseif(WITH_GHOST_SDL)
   list(APPEND SRC
-    intern/GHOST_ContextSDL.cpp
-    intern/GHOST_DisplayManagerSDL.cpp
-    intern/GHOST_SystemSDL.cpp
-    intern/GHOST_WindowSDL.cpp
+    intern/GHOST_ContextSDL.cc
+    intern/GHOST_DisplayManagerSDL.cc
+    intern/GHOST_SystemSDL.cc
+    intern/GHOST_WindowSDL.cc
 
-    intern/GHOST_ContextSDL.h
-    intern/GHOST_DisplayManagerSDL.h
-    intern/GHOST_SystemSDL.h
-    intern/GHOST_WindowSDL.h
+    intern/GHOST_ContextSDL.hh
+    intern/GHOST_DisplayManagerSDL.hh
+    intern/GHOST_SystemSDL.hh
+    intern/GHOST_WindowSDL.hh
   )
   add_definitions(-DWITH_GHOST_SDL)
 
@@ -167,23 +167,23 @@ elseif(APPLE AND NOT WITH_GHOST_X11)
     intern/GHOST_SystemCocoa.mm
     intern/GHOST_WindowCocoa.mm
 
-    intern/GHOST_DisplayManagerCocoa.h
-    intern/GHOST_SystemCocoa.h
-    intern/GHOST_WindowCocoa.h
-    intern/GHOST_WindowViewCocoa.h
+    intern/GHOST_DisplayManagerCocoa.hh
+    intern/GHOST_SystemCocoa.hh
+    intern/GHOST_WindowCocoa.hh
+    intern/GHOST_WindowViewCocoa.hh
   )
 
   list(APPEND SRC
     intern/GHOST_ContextCGL.mm
 
-    intern/GHOST_ContextCGL.h
+    intern/GHOST_ContextCGL.hh
   )
 
   if(WITH_INPUT_NDOF)
     list(APPEND SRC
       intern/GHOST_NDOFManagerCocoa.mm
 
-      intern/GHOST_NDOFManagerCocoa.h
+      intern/GHOST_NDOFManagerCocoa.hh
     )
   endif()
 
@@ -199,22 +199,22 @@ elseif(WITH_GHOST_X11 OR WITH_GHOST_WAYLAND)
     )
 
     list(APPEND SRC
-      intern/GHOST_DisplayManagerX11.cpp
-      intern/GHOST_SystemX11.cpp
-      intern/GHOST_TaskbarX11.cpp
-      intern/GHOST_WindowX11.cpp
+      intern/GHOST_DisplayManagerX11.cc
+      intern/GHOST_SystemX11.cc
+      intern/GHOST_TaskbarX11.cc
+      intern/GHOST_WindowX11.cc
 
-      intern/GHOST_DisplayManagerX11.h
-      intern/GHOST_IconX11.h
-      intern/GHOST_SystemX11.h
-      intern/GHOST_TaskbarX11.h
-      intern/GHOST_WindowX11.h
+      intern/GHOST_DisplayManagerX11.hh
+      intern/GHOST_IconX11.hh
+      intern/GHOST_SystemX11.hh
+      intern/GHOST_TaskbarX11.hh
+      intern/GHOST_WindowX11.hh
     )
 
     list(APPEND SRC
-      intern/GHOST_ContextGLX.cpp
+      intern/GHOST_ContextGLX.cc
 
-      intern/GHOST_ContextGLX.h
+      intern/GHOST_ContextGLX.hh
     )
 
     if(WITH_GHOST_XDND)
@@ -229,9 +229,9 @@ elseif(WITH_GHOST_X11 OR WITH_GHOST_WAYLAND)
       )
 
       list(APPEND SRC
-        intern/GHOST_DropTargetX11.cpp
+        intern/GHOST_DropTargetX11.cc
 
-        intern/GHOST_DropTargetX11.h
+        intern/GHOST_DropTargetX11.hh
       )
     endif()
 
@@ -336,13 +336,13 @@ elseif(WITH_GHOST_X11 OR WITH_GHOST_WAYLAND)
     endif()
 
     list(APPEND SRC
-      intern/GHOST_SystemWayland.cpp
-      intern/GHOST_WindowWayland.cpp
+      intern/GHOST_SystemWayland.cc
+      intern/GHOST_WindowWayland.cc
 
-      intern/GHOST_SystemWayland.h
-      intern/GHOST_WaylandCursorSettings.h
-      intern/GHOST_WaylandUtils.h
-      intern/GHOST_WindowWayland.h
+      intern/GHOST_SystemWayland.hh
+      intern/GHOST_WaylandCursorSettings.hh
+      intern/GHOST_WaylandUtils.hh
+      intern/GHOST_WindowWayland.hh
     )
 
     set(INC_DST ${CMAKE_CURRENT_BINARY_DIR}/libwayland)
@@ -441,9 +441,9 @@ elseif(WITH_GHOST_X11 OR WITH_GHOST_WAYLAND)
 
   if(WITH_INPUT_NDOF)
     list(APPEND SRC
-      intern/GHOST_NDOFManagerUnix.cpp
+      intern/GHOST_NDOFManagerUnix.cc
 
-      intern/GHOST_NDOFManagerUnix.h
+      intern/GHOST_NDOFManagerUnix.hh
     )
   endif()
 
@@ -463,67 +463,67 @@ elseif(WIN32)
   )
 
   list(APPEND SRC
-    intern/GHOST_ContextD3D.cpp
-    intern/GHOST_DisplayManagerWin32.cpp
-    intern/GHOST_DropTargetWin32.cpp
-    intern/GHOST_SystemWin32.cpp
-    intern/GHOST_TrackpadWin32.cpp
-    intern/GHOST_WindowWin32.cpp
-    intern/GHOST_Wintab.cpp
+    intern/GHOST_ContextD3D.cc
+    intern/GHOST_DisplayManagerWin32.cc
+    intern/GHOST_DropTargetWin32.cc
+    intern/GHOST_SystemWin32.cc
+    intern/GHOST_TrackpadWin32.cc
+    intern/GHOST_WindowWin32.cc
+    intern/GHOST_Wintab.cc
 
-    intern/GHOST_ContextD3D.h
-    intern/GHOST_DisplayManagerWin32.h
-    intern/GHOST_DropTargetWin32.h
-    intern/GHOST_SystemWin32.h
-    intern/GHOST_TaskbarWin32.h
-    intern/GHOST_TrackpadWin32.h
-    intern/GHOST_WindowWin32.h
-    intern/GHOST_Wintab.h
+    intern/GHOST_ContextD3D.hh
+    intern/GHOST_DisplayManagerWin32.hh
+    intern/GHOST_DropTargetWin32.hh
+    intern/GHOST_SystemWin32.hh
+    intern/GHOST_TaskbarWin32.hh
+    intern/GHOST_TrackpadWin32.hh
+    intern/GHOST_WindowWin32.hh
+    intern/GHOST_Wintab.hh
   )
 
   list(APPEND SRC
-    intern/GHOST_ContextWGL.cpp
+    intern/GHOST_ContextWGL.cc
 
-    intern/GHOST_ContextWGL.h
+    intern/GHOST_ContextWGL.hh
   )
 
   if(WITH_INPUT_IME)
     add_definitions(-DWITH_INPUT_IME)
 
     list(APPEND SRC
-      intern/GHOST_ImeWin32.cpp
+      intern/GHOST_ImeWin32.cc
 
-      intern/GHOST_ImeWin32.h
+      intern/GHOST_ImeWin32.hh
     )
   endif()
 
   if(WITH_INPUT_NDOF)
     list(APPEND SRC
-      intern/GHOST_NDOFManagerWin32.cpp
+      intern/GHOST_NDOFManagerWin32.cc
 
-      intern/GHOST_NDOFManagerWin32.h
+      intern/GHOST_NDOFManagerWin32.hh
     )
   endif()
 endif()
 
 if(UNIX AND NOT APPLE)
   list(APPEND SRC
-    intern/GHOST_ContextEGL.cpp
+    intern/GHOST_ContextEGL.cc
 
-    intern/GHOST_ContextEGL.h
+    intern/GHOST_ContextEGL.hh
   )
 endif()
 
 if(APPLE)
   list(APPEND SRC
-    intern/GHOST_SystemPathsCocoa.h
+    intern/GHOST_SystemPathsCocoa.hh
     intern/GHOST_SystemPathsCocoa.mm
   )
 
 elseif(UNIX)
   list(APPEND SRC
-    intern/GHOST_SystemPathsUnix.cpp
-    intern/GHOST_SystemPathsUnix.h
+    intern/GHOST_SystemPathsUnix.cc
+    intern/GHOST_SystemPathsUnix.hh
   )
 
   if(NOT WITH_INSTALL_PORTABLE)
@@ -532,8 +532,8 @@ elseif(UNIX)
 
 elseif(WIN32)
   list(APPEND SRC
-    intern/GHOST_SystemPathsWin32.cpp
-    intern/GHOST_SystemPathsWin32.h
+    intern/GHOST_SystemPathsWin32.cc
+    intern/GHOST_SystemPathsWin32.hh
   )
 
   list(APPEND INC
@@ -544,25 +544,25 @@ endif()
 
 if(WITH_XR_OPENXR)
   list(APPEND SRC
-    intern/GHOST_Xr.cpp
-    intern/GHOST_XrAction.cpp
-    intern/GHOST_XrContext.cpp
-    intern/GHOST_XrControllerModel.cpp
-    intern/GHOST_XrEvent.cpp
-    intern/GHOST_XrGraphicsBinding.cpp
-    intern/GHOST_XrSession.cpp
-    intern/GHOST_XrSwapchain.cpp
+    intern/GHOST_Xr.cc
+    intern/GHOST_XrAction.cc
+    intern/GHOST_XrContext.cc
+    intern/GHOST_XrControllerModel.cc
+    intern/GHOST_XrEvent.cc
+    intern/GHOST_XrGraphicsBinding.cc
+    intern/GHOST_XrSession.cc
+    intern/GHOST_XrSwapchain.cc
 
-    GHOST_IXrContext.h
-    intern/GHOST_IXrGraphicsBinding.h
-    intern/GHOST_XrAction.h
-    intern/GHOST_XrContext.h
-    intern/GHOST_XrControllerModel.h
-    intern/GHOST_XrException.h
-    intern/GHOST_XrSession.h
-    intern/GHOST_XrSwapchain.h
-    intern/GHOST_Xr_intern.h
-    intern/GHOST_Xr_openxr_includes.h
+    GHOST_IXrContext.hh
+    intern/GHOST_IXrGraphicsBinding.hh
+    intern/GHOST_XrAction.hh
+    intern/GHOST_XrContext.hh
+    intern/GHOST_XrControllerModel.hh
+    intern/GHOST_XrException.hh
+    intern/GHOST_XrSession.hh
+    intern/GHOST_XrSwapchain.hh
+    intern/GHOST_Xr_intern.hh
+    intern/GHOST_Xr_openxr_includes.hh
 
     # Header only library.
     ../../extern/tinygltf/tiny_gltf.h
diff --git a/intern/ghost/GHOST_IContext.h b/intern/ghost/GHOST_IContext.hh
similarity index 100%
rename from intern/ghost/GHOST_IContext.h
rename to intern/ghost/GHOST_IContext.hh
diff --git a/intern/ghost/GHOST_IEvent.h b/intern/ghost/GHOST_IEvent.hh
similarity index 100%
rename from intern/ghost/GHOST_IEvent.h
rename to intern/ghost/GHOST_IEvent.hh
diff --git a/intern/ghost/GHOST_IEventConsumer.h b/intern/ghost/GHOST_IEventConsumer.hh
similarity index 97%
rename from intern/ghost/GHOST_IEventConsumer.h
rename to intern/ghost/GHOST_IEventConsumer.hh
index eb07a3fde05..c9d111ca499 100644
--- a/intern/ghost/GHOST_IEventConsumer.h
+++ b/intern/ghost/GHOST_IEventConsumer.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "GHOST_IEvent.h"
+#include "GHOST_IEvent.hh"
 
 /**
  * Interface class for objects interested in receiving events.
diff --git a/intern/ghost/GHOST_ISystem.h b/intern/ghost/GHOST_ISystem.hh
similarity index 98%
rename from intern/ghost/GHOST_ISystem.h
rename to intern/ghost/GHOST_ISystem.hh
index 83828fb43c6..de36dd19e93 100644
--- a/intern/ghost/GHOST_ISystem.h
+++ b/intern/ghost/GHOST_ISystem.hh
@@ -12,9 +12,9 @@
 
 #include <stdlib.h>
 
-#include "GHOST_IContext.h"
-#include "GHOST_ITimerTask.h"
-#include "GHOST_IWindow.h"
+#include "GHOST_IContext.hh"
+#include "GHOST_ITimerTask.hh"
+#include "GHOST_IWindow.hh"
 #include "GHOST_Types.h"
 
 class GHOST_IEventConsumer;
@@ -77,12 +77,12 @@ class GHOST_IEventConsumer;
  *
  * \subsection cplusplus_api The C++ API consists of the following files:
  *
- * - GHOST_IEvent.h
- * - GHOST_IEventConsumer.h
- * - GHOST_ISystem.h
- * - GHOST_ITimerTask.h
- * - GHOST_IWindow.h
- * - GHOST_Rect.h
+ * - GHOST_IEvent.hh
+ * - GHOST_IEventConsumer.hh
+ * - GHOST_ISystem.hh
+ * - GHOST_ITimerTask.hh
+ * - GHOST_IWindow.hh
+ * - GHOST_Rect.hh
  * - GHOST_Types.h
  *
  * For an example of using the C++-API, have a look at the GHOST_C-Test.cpp
diff --git a/intern/ghost/GHOST_ISystemPaths.h b/intern/ghost/GHOST_ISystemPaths.hh
similarity index 100%
rename from intern/ghost/GHOST_ISystemPaths.h
rename to intern/ghost/GHOST_ISystemPaths.hh
diff --git a/intern/ghost/GHOST_ITimerTask.h b/intern/ghost/GHOST_ITimerTask.hh
similarity index 100%
rename from intern/ghost/GHOST_ITimerTask.h
rename to intern/ghost/GHOST_ITimerTask.hh
diff --git a/intern/ghost/GHOST_IWindow.h b/intern/ghost/GHOST_IWindow.hh
similarity index 99%
rename from intern/ghost/GHOST_IWindow.h
rename to intern/ghost/GHOST_IWindow.hh
index a8092c40ea7..dfbc3ef76c6 100644
--- a/intern/ghost/GHOST_IWindow.h
+++ b/intern/ghost/GHOST_IWindow.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "GHOST_Rect.h"
+#include "GHOST_Rect.hh"
 #include "GHOST_Types.h"
 
 #include <stdlib.h>
diff --git a/intern/ghost/GHOST_IXrContext.h b/intern/ghost/GHOST_IXrContext.hh
similarity index 100%
rename from intern/ghost/GHOST_IXrContext.h
rename to intern/ghost/GHOST_IXrContext.hh
diff --git a/intern/ghost/GHOST_Path-api.h b/intern/ghost/GHOST_Path-api.hh
similarity index 100%
rename from intern/ghost/GHOST_Path-api.h
rename to intern/ghost/GHOST_Path-api.hh
diff --git a/intern/ghost/GHOST_Rect.h b/intern/ghost/GHOST_Rect.hh
similarity index 100%
rename from intern/ghost/GHOST_Rect.h
rename to intern/ghost/GHOST_Rect.hh
diff --git a/intern/ghost/intern/GHOST_Buttons.cpp b/intern/ghost/intern/GHOST_Buttons.cc
similarity index 98%
rename from intern/ghost/intern/GHOST_Buttons.cpp
rename to intern/ghost/intern/GHOST_Buttons.cc
index a5b3a8fb524..96aa361293b 100644
--- a/intern/ghost/intern/GHOST_Buttons.cpp
+++ b/intern/ghost/intern/GHOST_Buttons.cc
@@ -5,7 +5,7 @@
  * \ingroup GHOST
  */
 
-#include "GHOST_Buttons.h"
+#include "GHOST_Buttons.hh"
 
 GHOST_Buttons::GHOST_Buttons()
 {
diff --git a/intern/ghost/intern/GHOST_Buttons.h b/intern/ghost/intern/GHOST_Buttons.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_Buttons.h
rename to intern/ghost/intern/GHOST_Buttons.hh
diff --git a/intern/ghost/intern/GHOST_C-api.cpp b/intern/ghost/intern/GHOST_C-api.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_C-api.cpp
rename to intern/ghost/intern/GHOST_C-api.cc
index 00436ceb4cc..9b9d9465811 100644
--- a/intern/ghost/intern/GHOST_C-api.cpp
+++ b/intern/ghost/intern/GHOST_C-api.cc
@@ -11,16 +11,16 @@
 #include <cstring>
 
 #include "GHOST_C-api.h"
-#include "GHOST_IEvent.h"
-#include "GHOST_IEventConsumer.h"
-#include "GHOST_ISystem.h"
-#include "intern/GHOST_Debug.h"
+#include "GHOST_IEvent.hh"
+#include "GHOST_IEventConsumer.hh"
+#include "GHOST_ISystem.hh"
+#include "intern/GHOST_Debug.hh"
 #ifdef WITH_XR_OPENXR
-#  include "GHOST_IXrContext.h"
-#  include "intern/GHOST_XrSession.h"
+#  include "GHOST_IXrContext.hh"
+#  include "intern/GHOST_XrSession.hh"
 #endif
-#include "intern/GHOST_CallbackEventConsumer.h"
-#include "intern/GHOST_XrException.h"
+#include "intern/GHOST_CallbackEventConsumer.hh"
+#include "intern/GHOST_XrException.hh"
 
 GHOST_SystemHandle GHOST_CreateSystem(void)
 {
diff --git a/intern/ghost/intern/GHOST_CallbackEventConsumer.cpp b/intern/ghost/intern/GHOST_CallbackEventConsumer.cc
similarity index 89%
rename from intern/ghost/intern/GHOST_CallbackEventConsumer.cpp
rename to intern/ghost/intern/GHOST_CallbackEventConsumer.cc
index 9f14d56cd9a..d47a1394306 100644
--- a/intern/ghost/intern/GHOST_CallbackEventConsumer.cpp
+++ b/intern/ghost/intern/GHOST_CallbackEventConsumer.cc
@@ -9,9 +9,9 @@
  * Copyright (C) 2001 NaN Technologies B.V.
  */
 
-#include "GHOST_CallbackEventConsumer.h"
+#include "GHOST_CallbackEventConsumer.hh"
 #include "GHOST_C-api.h"
-#include "GHOST_Debug.h"
+#include "GHOST_Debug.hh"
 
 GHOST_CallbackEventConsumer::GHOST_CallbackEventConsumer(GHOST_EventCallbackProcPtr eventCallback,
                                                          GHOST_TUserDataPtr userData)
diff --git a/intern/ghost/intern/GHOST_CallbackEventConsumer.h b/intern/ghost/intern/GHOST_CallbackEventConsumer.hh
similarity index 97%
rename from intern/ghost/intern/GHOST_CallbackEventConsumer.h
rename to intern/ghost/intern/GHOST_CallbackEventConsumer.hh
index cb8676c6f2e..30b525e8d2e 100644
--- a/intern/ghost/intern/GHOST_CallbackEventConsumer.h
+++ b/intern/ghost/intern/GHOST_CallbackEventConsumer.hh
@@ -9,7 +9,7 @@
 #pragma once
 
 #include "GHOST_C-api.h"
-#include "GHOST_IEventConsumer.h"
+#include "GHOST_IEventConsumer.hh"
 
 /**
  * Event consumer that will forward events to a call-back routine.
diff --git a/intern/ghost/intern/GHOST_Context.cpp b/intern/ghost/intern/GHOST_Context.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_Context.cpp
rename to intern/ghost/intern/GHOST_Context.cc
index 6a670e51deb..cb7bfa61fd8 100644
--- a/intern/ghost/intern/GHOST_Context.cpp
+++ b/intern/ghost/intern/GHOST_Context.cc
@@ -7,7 +7,7 @@
  * Definition of GHOST_Context class.
  */
 
-#include "GHOST_Context.h"
+#include "GHOST_Context.hh"
 
 #ifdef _WIN32
 #  include <epoxy/wgl.h>
diff --git a/intern/ghost/intern/GHOST_Context.h b/intern/ghost/intern/GHOST_Context.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_Context.h
rename to intern/ghost/intern/GHOST_Context.hh
index 82972b81468..e79f2847fe8 100644
--- a/intern/ghost/intern/GHOST_Context.h
+++ b/intern/ghost/intern/GHOST_Context.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "GHOST_IContext.h"
+#include "GHOST_IContext.hh"
 #include "GHOST_Types.h"
 
 #include <epoxy/gl.h>
diff --git a/intern/ghost/intern/GHOST_ContextCGL.h b/intern/ghost/intern/GHOST_ContextCGL.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_ContextCGL.h
rename to intern/ghost/intern/GHOST_ContextCGL.hh
index 2cc35a5d13e..f0ec062bf4b 100644
--- a/intern/ghost/intern/GHOST_ContextCGL.h
+++ b/intern/ghost/intern/GHOST_ContextCGL.hh
@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include "GHOST_Context.h"
+#include "GHOST_Context.hh"
 
 #include <Cocoa/Cocoa.h>
 #include <Metal/Metal.h>
diff --git a/intern/ghost/intern/GHOST_ContextCGL.mm b/intern/ghost/intern/GHOST_ContextCGL.mm
index 9335dc6cd19..200e4ac2c3d 100644
--- a/intern/ghost/intern/GHOST_ContextCGL.mm
+++ b/intern/ghost/intern/GHOST_ContextCGL.mm
@@ -13,7 +13,7 @@
 #  pragma clang diagnostic ignored "-Wdeprecated-declarations"
 #endif
 
-#include "GHOST_ContextCGL.h"
+#include "GHOST_ContextCGL.hh"
 
 #include <Cocoa/Cocoa.h>
 #include <Metal/Metal.h>
diff --git a/intern/ghost/intern/GHOST_ContextD3D.cpp b/intern/ghost/intern/GHOST_ContextD3D.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_ContextD3D.cpp
rename to intern/ghost/intern/GHOST_ContextD3D.cc
index 53bb73ba258..4a7bac01741 100644
--- a/intern/ghost/intern/GHOST_ContextD3D.cpp
+++ b/intern/ghost/intern/GHOST_ContextD3D.cc
@@ -12,8 +12,8 @@
 
 #include <epoxy/wgl.h>
 
-#include "GHOST_ContextD3D.h"
-#include "GHOST_ContextWGL.h" /* For shared drawing */
+#include "GHOST_ContextD3D.hh"
+#include "GHOST_ContextWGL.hh" /* For shared drawing */
 
 HMODULE GHOST_ContextD3D::s_d3d_lib = NULL;
 PFN_D3D11_CREATE_DEVICE GHOST_ContextD3D::s_D3D11CreateDeviceFn = NULL;
diff --git a/intern/ghost/intern/GHOST_ContextD3D.h b/intern/ghost/intern/GHOST_ContextD3D.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_ContextD3D.h
rename to intern/ghost/intern/GHOST_ContextD3D.hh
index c97064d9cce..f52d34bfedb 100644
--- a/intern/ghost/intern/GHOST_ContextD3D.h
+++ b/intern/ghost/intern/GHOST_ContextD3D.hh
@@ -12,7 +12,7 @@
 
 #include <D3D11.h>
 
-#include "GHOST_Context.h"
+#include "GHOST_Context.hh"
 
 class GHOST_ContextD3D : public GHOST_Context {
   /* XR code needs low level graphics data to send to OpenXR. */
diff --git a/intern/ghost/intern/GHOST_ContextEGL.cpp b/intern/ghost/intern/GHOST_ContextEGL.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_ContextEGL.cpp
rename to intern/ghost/intern/GHOST_ContextEGL.cc
index ca19a2e0e15..91f86bbd262 100644
--- a/intern/ghost/intern/GHOST_ContextEGL.cpp
+++ b/intern/ghost/intern/GHOST_ContextEGL.cc
@@ -7,7 +7,7 @@
  * Definition of GHOST_ContextEGL class.
  */
 
-#include "GHOST_ContextEGL.h"
+#include "GHOST_ContextEGL.hh"
 
 #include <set>
 #include <sstream>
diff --git a/intern/ghost/intern/GHOST_ContextEGL.h b/intern/ghost/intern/GHOST_ContextEGL.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_ContextEGL.h
rename to intern/ghost/intern/GHOST_ContextEGL.hh
index 931f55164f2..4fae6487d4d 100644
--- a/intern/ghost/intern/GHOST_ContextEGL.h
+++ b/intern/ghost/intern/GHOST_ContextEGL.hh
@@ -7,8 +7,8 @@
 
 #pragma once
 
-#include "GHOST_Context.h"
-#include "GHOST_System.h"
+#include "GHOST_Context.hh"
+#include "GHOST_System.hh"
 
 #include <epoxy/egl.h>
 #include <epoxy/gl.h>
diff --git a/intern/ghost/intern/GHOST_ContextGLX.cpp b/intern/ghost/intern/GHOST_ContextGLX.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_ContextGLX.cpp
rename to intern/ghost/intern/GHOST_ContextGLX.cc
index d4e5c39a01e..04021d05cda 100644
--- a/intern/ghost/intern/GHOST_ContextGLX.cpp
+++ b/intern/ghost/intern/GHOST_ContextGLX.cc
@@ -7,8 +7,8 @@
  * Definition of GHOST_ContextGLX class.
  */
 
-#include "GHOST_ContextGLX.h"
-#include "GHOST_SystemX11.h"
+#include "GHOST_ContextGLX.hh"
+#include "GHOST_SystemX11.hh"
 
 #include <vector>
 
diff --git a/intern/ghost/intern/GHOST_ContextGLX.h b/intern/ghost/intern/GHOST_ContextGLX.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_ContextGLX.h
rename to intern/ghost/intern/GHOST_ContextGLX.hh
index 448d6c16ef4..5df74464242 100644
--- a/intern/ghost/intern/GHOST_ContextGLX.h
+++ b/intern/ghost/intern/GHOST_ContextGLX.hh
@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include "GHOST_Context.h"
+#include "GHOST_Context.hh"
 
 #include <epoxy/glx.h>
 
diff --git a/intern/ghost/intern/GHOST_ContextNone.cpp b/intern/ghost/intern/GHOST_ContextNone.cc
similarity index 96%
rename from intern/ghost/intern/GHOST_ContextNone.cpp
rename to intern/ghost/intern/GHOST_ContextNone.cc
index 24c9deb04c8..d8cb9505200 100644
--- a/intern/ghost/intern/GHOST_ContextNone.cpp
+++ b/intern/ghost/intern/GHOST_ContextNone.cc
@@ -7,7 +7,7 @@
  * Definition of GHOST_ContextNone class.
  */
 
-#include "GHOST_ContextNone.h"
+#include "GHOST_ContextNone.hh"
 
 GHOST_TSuccess GHOST_ContextNone::swapBuffers()
 {
diff --git a/intern/ghost/intern/GHOST_ContextNone.h b/intern/ghost/intern/GHOST_ContextNone.hh
similarity index 97%
rename from intern/ghost/intern/GHOST_ContextNone.h
rename to intern/ghost/intern/GHOST_ContextNone.hh
index ac8b5ae6478..06983caff11 100644
--- a/intern/ghost/intern/GHOST_ContextNone.h
+++ b/intern/ghost/intern/GHOST_ContextNone.hh
@@ -9,7 +9,7 @@
 
 #pragma once
 
-#include "GHOST_Context.h"
+#include "GHOST_Context.hh"
 
 class GHOST_ContextNone : public GHOST_Context {
  public:
diff --git a/intern/ghost/intern/GHOST_ContextSDL.cpp b/intern/ghost/intern/GHOST_ContextSDL.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_ContextSDL.cpp
rename to intern/ghost/intern/GHOST_ContextSDL.cc
index d06ece6e75c..a0450c065dd 100644
--- a/intern/ghost/intern/GHOST_ContextSDL.cpp
+++ b/intern/ghost/intern/GHOST_ContextSDL.cc
@@ -7,7 +7,7 @@
  * Definition of GHOST_ContextSDL class.
  */
 
-#include "GHOST_ContextSDL.h"
+#include "GHOST_ContextSDL.hh"
 
 #include <vector>
 
diff --git a/intern/ghost/intern/GHOST_ContextSDL.h b/intern/ghost/intern/GHOST_ContextSDL.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_ContextSDL.h
rename to intern/ghost/intern/GHOST_ContextSDL.hh
index 56bc39a7e59..ad6db6b63a0 100644
--- a/intern/ghost/intern/GHOST_ContextSDL.h
+++ b/intern/ghost/intern/GHOST_ContextSDL.hh
@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include "GHOST_Context.h"
+#include "GHOST_Context.hh"
 
 extern "C" {
 #include "SDL.h"
diff --git a/intern/ghost/intern/GHOST_ContextVK.cpp b/intern/ghost/intern/GHOST_ContextVK.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_ContextVK.cpp
rename to intern/ghost/intern/GHOST_ContextVK.cc
index b6d64b157eb..d1dc8083955 100644
--- a/intern/ghost/intern/GHOST_ContextVK.cpp
+++ b/intern/ghost/intern/GHOST_ContextVK.cc
@@ -4,7 +4,7 @@
  * \ingroup GHOST
  */
 
-#include "GHOST_ContextVK.h"
+#include "GHOST_ContextVK.hh"
 
 #ifdef _WIN32
 #  include <vulkan/vulkan_win32.h>
diff --git a/intern/ghost/intern/GHOST_ContextVK.h b/intern/ghost/intern/GHOST_ContextVK.hh
similarity index 97%
rename from intern/ghost/intern/GHOST_ContextVK.h
rename to intern/ghost/intern/GHOST_ContextVK.hh
index 1fdf6658a82..aa8af898b1b 100644
--- a/intern/ghost/intern/GHOST_ContextVK.h
+++ b/intern/ghost/intern/GHOST_ContextVK.hh
@@ -6,16 +6,16 @@
 
 #pragma once
 
-#include "GHOST_Context.h"
+#include "GHOST_Context.hh"
 
 #ifdef _WIN32
-#  include "GHOST_SystemWin32.h"
+#  include "GHOST_SystemWin32.hh"
 #elif defined(__APPLE__)
-#  include "GHOST_SystemCocoa.h"
+#  include "GHOST_SystemCocoa.hh"
 #else
-#  include "GHOST_SystemX11.h"
+#  include "GHOST_SystemX11.hh"
 #  ifdef WITH_GHOST_WAYLAND
-#    include "GHOST_SystemWayland.h"
+#    include "GHOST_SystemWayland.hh"
 #  else
 #    define wl_surface void
 #    define wl_display void
diff --git a/intern/ghost/intern/GHOST_ContextWGL.cpp b/intern/ghost/intern/GHOST_ContextWGL.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_ContextWGL.cpp
rename to intern/ghost/intern/GHOST_ContextWGL.cc
index 3a33475d71a..dcf877106fd 100644
--- a/intern/ghost/intern/GHOST_ContextWGL.cpp
+++ b/intern/ghost/intern/GHOST_ContextWGL.cc
@@ -7,7 +7,7 @@
  * Definition of GHOST_ContextWGL class.
  */
 
-#include "GHOST_ContextWGL.h"
+#include "GHOST_ContextWGL.hh"
 
 #include <tchar.h>
 
diff --git a/intern/ghost/intern/GHOST_ContextWGL.h b/intern/ghost/intern/GHOST_ContextWGL.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_ContextWGL.h
rename to intern/ghost/intern/GHOST_ContextWGL.hh
index 23d5382d7ac..943dba7c89a 100644
--- a/intern/ghost/intern/GHOST_ContextWGL.h
+++ b/intern/ghost/intern/GHOST_ContextWGL.hh
@@ -9,7 +9,7 @@
 
 //#define WIN32_COMPOSITING
 
-#include "GHOST_Context.h"
+#include "GHOST_Context.hh"
 
 #include <epoxy/wgl.h>
 
diff --git a/intern/ghost/intern/GHOST_Debug.h b/intern/ghost/intern/GHOST_Debug.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_Debug.h
rename to intern/ghost/intern/GHOST_Debug.hh
diff --git a/intern/ghost/intern/GHOST_DisplayManager.cpp b/intern/ghost/intern/GHOST_DisplayManager.cc
similarity index 98%
rename from intern/ghost/intern/GHOST_DisplayManager.cpp
rename to intern/ghost/intern/GHOST_DisplayManager.cc
index dfc1dd9aa49..42a816b645a 100644
--- a/intern/ghost/intern/GHOST_DisplayManager.cpp
+++ b/intern/ghost/intern/GHOST_DisplayManager.cc
@@ -9,8 +9,8 @@
  * Copyright (C) 2001 NaN Technologies B.V.
  */
 
-#include "GHOST_DisplayManager.h"
-#include "GHOST_Debug.h"
+#include "GHOST_DisplayManager.hh"
+#include "GHOST_Debug.hh"
 
 GHOST_DisplayManager::GHOST_DisplayManager() : m_settingsInitialized(false) {}
 
diff --git a/intern/ghost/intern/GHOST_DisplayManager.h b/intern/ghost/intern/GHOST_DisplayManager.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_DisplayManager.h
rename to intern/ghost/intern/GHOST_DisplayManager.hh
diff --git a/intern/ghost/intern/GHOST_DisplayManagerCocoa.h b/intern/ghost/intern/GHOST_DisplayManagerCocoa.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_DisplayManagerCocoa.h
rename to intern/ghost/intern/GHOST_DisplayManagerCocoa.hh
index 7106db314ea..b68946861b0 100644
--- a/intern/ghost/intern/GHOST_DisplayManagerCocoa.h
+++ b/intern/ghost/intern/GHOST_DisplayManagerCocoa.hh
@@ -12,7 +12,7 @@
 #  error Apple only!
 #endif  // __APPLE__
 
-#include "GHOST_DisplayManager.h"
+#include "GHOST_DisplayManager.hh"
 
 /**
  * Manages system displays  (Mac OSX/Cocoa implementation).
diff --git a/intern/ghost/intern/GHOST_DisplayManagerCocoa.mm b/intern/ghost/intern/GHOST_DisplayManagerCocoa.mm
index fba0795ee2b..09d8f09d956 100644
--- a/intern/ghost/intern/GHOST_DisplayManagerCocoa.mm
+++ b/intern/ghost/intern/GHOST_DisplayManagerCocoa.mm
@@ -3,8 +3,8 @@
 
 #include <Cocoa/Cocoa.h>
 
-#include "GHOST_Debug.h"
-#include "GHOST_DisplayManagerCocoa.h"
+#include "GHOST_Debug.hh"
+#include "GHOST_DisplayManagerCocoa.hh"
 
 // We do not support multiple monitors at the moment
 
diff --git a/intern/ghost/intern/GHOST_DisplayManagerNULL.h b/intern/ghost/intern/GHOST_DisplayManagerNULL.hh
similarity index 94%
rename from intern/ghost/intern/GHOST_DisplayManagerNULL.h
rename to intern/ghost/intern/GHOST_DisplayManagerNULL.hh
index dbef4fafd8f..9b6c39e570a 100644
--- a/intern/ghost/intern/GHOST_DisplayManagerNULL.h
+++ b/intern/ghost/intern/GHOST_DisplayManagerNULL.hh
@@ -7,8 +7,8 @@
 
 #pragma once
 
-#include "GHOST_DisplayManager.h"
-#include "GHOST_SystemHeadless.h"
+#include "GHOST_DisplayManager.hh"
+#include "GHOST_SystemHeadless.hh"
 
 class GHOST_SystemHeadless;
 
diff --git a/intern/ghost/intern/GHOST_DisplayManagerSDL.cpp b/intern/ghost/intern/GHOST_DisplayManagerSDL.cc
similarity index 97%
rename from intern/ghost/intern/GHOST_DisplayManagerSDL.cpp
rename to intern/ghost/intern/GHOST_DisplayManagerSDL.cc
index eed437adc6c..9387b716061 100644
--- a/intern/ghost/intern/GHOST_DisplayManagerSDL.cpp
+++ b/intern/ghost/intern/GHOST_DisplayManagerSDL.cc
@@ -8,10 +8,10 @@
  * \ingroup GHOST
  */
 
-#include "GHOST_DisplayManagerSDL.h"
-#include "GHOST_SystemSDL.h"
+#include "GHOST_DisplayManagerSDL.hh"
+#include "GHOST_SystemSDL.hh"
 
-#include "GHOST_WindowManager.h"
+#include "GHOST_WindowManager.hh"
 
 GHOST_DisplayManagerSDL::GHOST_DisplayManagerSDL(GHOST_SystemSDL *system)
     : GHOST_DisplayManager(), m_system(system)
diff --git a/intern/ghost/intern/GHOST_DisplayManagerSDL.h b/intern/ghost/intern/GHOST_DisplayManagerSDL.hh
similarity index 96%
rename from intern/ghost/intern/GHOST_DisplayManagerSDL.h
rename to intern/ghost/intern/GHOST_DisplayManagerSDL.hh
index 266eb9b8455..58dda0acfea 100644
--- a/intern/ghost/intern/GHOST_DisplayManagerSDL.h
+++ b/intern/ghost/intern/GHOST_DisplayManagerSDL.hh
@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include "GHOST_DisplayManager.h"
+#include "GHOST_DisplayManager.hh"
 
 extern "C" {
 #include "SDL.h"
diff --git a/intern/ghost/intern/GHOST_DisplayManagerWin32.cpp b/intern/ghost/intern/GHOST_DisplayManagerWin32.cc
similarity index 98%
rename from intern/ghost/intern/GHOST_DisplayManagerWin32.cpp
rename to intern/ghost/intern/GHOST_DisplayManagerWin32.cc
index ce107016877..69624dcf8b2 100644
--- a/intern/ghost/intern/GHOST_DisplayManagerWin32.cpp
+++ b/intern/ghost/intern/GHOST_DisplayManagerWin32.cc
@@ -5,8 +5,8 @@
  * \ingroup GHOST
  */
 
-#include "GHOST_DisplayManagerWin32.h"
-#include "GHOST_Debug.h"
+#include "GHOST_DisplayManagerWin32.hh"
+#include "GHOST_Debug.hh"
 
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
diff --git a/intern/ghost/intern/GHOST_DisplayManagerWin32.h b/intern/ghost/intern/GHOST_DisplayManagerWin32.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_DisplayManagerWin32.h
rename to intern/ghost/intern/GHOST_DisplayManagerWin32.hh
index 387867d2a5d..b1f62ab98e4 100644
--- a/intern/ghost/intern/GHOST_DisplayManagerWin32.h
+++ b/intern/ghost/intern/GHOST_DisplayManagerWin32.hh
@@ -12,7 +12,7 @@
 #  error WIN32 only!
 #endif  // WIN32
 
-#include "GHOST_DisplayManager.h"
+#include "GHOST_DisplayManager.hh"
 
 /**
  * Manages system displays  (WIN32 implementation).
diff --git a/intern/ghost/intern/GHOST_DisplayManagerX11.cpp b/intern/ghost/intern/GHOST_DisplayManagerX11.cc
similarity index 98%
rename from intern/ghost/intern/GHOST_DisplayManagerX11.cpp
rename to intern/ghost/intern/GHOST_DisplayManagerX11.cc
index 53189c6551b..a6a632a1efb 100644
--- a/intern/ghost/intern/GHOST_DisplayManagerX11.cpp
+++ b/intern/ghost/intern/GHOST_DisplayManagerX11.cc
@@ -14,8 +14,8 @@
 #  include <X11/extensions/xf86vmode.h>
 #endif
 
-#include "GHOST_DisplayManagerX11.h"
-#include "GHOST_SystemX11.h"
+#include "GHOST_DisplayManagerX11.hh"
+#include "GHOST_SystemX11.hh"
 
 GHOST_DisplayManagerX11::GHOST_DisplayManagerX11(GHOST_SystemX11 *system)
     : GHOST_DisplayManager(), m_system(system)
diff --git a/intern/ghost/intern/GHOST_DisplayManagerX11.h b/intern/ghost/intern/GHOST_DisplayManagerX11.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_DisplayManagerX11.h
rename to intern/ghost/intern/GHOST_DisplayManagerX11.hh
index 497759cb8af..76deeac1a7d 100644
--- a/intern/ghost/intern/GHOST_DisplayManagerX11.h
+++ b/intern/ghost/intern/GHOST_DisplayManagerX11.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "GHOST_DisplayManager.h"
+#include "GHOST_DisplayManager.hh"
 
 class GHOST_SystemX11;
 
diff --git a/intern/ghost/intern/GHOST_DropTargetWin32.cpp b/intern/ghost/intern/GHOST_DropTargetWin32.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_DropTargetWin32.cpp
rename to intern/ghost/intern/GHOST_DropTargetWin32.cc
index c2c58d1867c..b21bd5fabad 100644
--- a/intern/ghost/intern/GHOST_DropTargetWin32.cpp
+++ b/intern/ghost/intern/GHOST_DropTargetWin32.cc
@@ -5,8 +5,8 @@
  * \ingroup GHOST
  */
 
-#include "GHOST_DropTargetWin32.h"
-#include "GHOST_Debug.h"
+#include "GHOST_DropTargetWin32.hh"
+#include "GHOST_Debug.hh"
 #include <shellapi.h>
 
 #include "utf_winfunc.h"
diff --git a/intern/ghost/intern/GHOST_DropTargetWin32.h b/intern/ghost/intern/GHOST_DropTargetWin32.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_DropTargetWin32.h
rename to intern/ghost/intern/GHOST_DropTargetWin32.hh
index 03e5492fcb1..c7355baa23e 100644
--- a/intern/ghost/intern/GHOST_DropTargetWin32.h
+++ b/intern/ghost/intern/GHOST_DropTargetWin32.hh
@@ -7,8 +7,8 @@
 
 #pragma once
 
-#include "GHOST_SystemWin32.h"
-#include "GHOST_WindowWin32.h"
+#include "GHOST_SystemWin32.hh"
+#include "GHOST_WindowWin32.hh"
 #include <GHOST_Types.h>
 #include <string.h>
 
diff --git a/intern/ghost/intern/GHOST_DropTargetX11.cpp b/intern/ghost/intern/GHOST_DropTargetX11.cc
similarity index 97%
rename from intern/ghost/intern/GHOST_DropTargetX11.cpp
rename to intern/ghost/intern/GHOST_DropTargetX11.cc
index 7595f31c2e1..f3b42a1da93 100644
--- a/intern/ghost/intern/GHOST_DropTargetX11.cpp
+++ b/intern/ghost/intern/GHOST_DropTargetX11.cc
@@ -5,10 +5,10 @@
  * \ingroup GHOST
  */
 
-#include "GHOST_DropTargetX11.h"
-#include "GHOST_Debug.h"
-#include "GHOST_PathUtils.h"
-#include "GHOST_utildefines.h"
+#include "GHOST_DropTargetX11.hh"
+#include "GHOST_Debug.hh"
+#include "GHOST_PathUtils.hh"
+#include "GHOST_utildefines.hh"
 
 #include <cassert>
 #include <cctype>
diff --git a/intern/ghost/intern/GHOST_DropTargetX11.h b/intern/ghost/intern/GHOST_DropTargetX11.hh
similarity index 97%
rename from intern/ghost/intern/GHOST_DropTargetX11.h
rename to intern/ghost/intern/GHOST_DropTargetX11.hh
index 484c76eacbe..66d16cc655f 100644
--- a/intern/ghost/intern/GHOST_DropTargetX11.h
+++ b/intern/ghost/intern/GHOST_DropTargetX11.hh
@@ -7,8 +7,8 @@
 
 #pragma once
 
-#include "GHOST_SystemX11.h"
-#include "GHOST_WindowX11.h"
+#include "GHOST_SystemX11.hh"
+#include "GHOST_WindowX11.hh"
 #include <GHOST_Types.h>
 
 #include "xdnd.h"
diff --git a/intern/ghost/intern/GHOST_Event.h b/intern/ghost/intern/GHOST_Event.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_Event.h
rename to intern/ghost/intern/GHOST_Event.hh
index 1e1c428e2ae..fa7948e3f90 100644
--- a/intern/ghost/intern/GHOST_Event.h
+++ b/intern/ghost/intern/GHOST_Event.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "GHOST_IEvent.h"
+#include "GHOST_IEvent.hh"
 
 /**
  * Base class for events received the operating system.
diff --git a/intern/ghost/intern/GHOST_EventButton.h b/intern/ghost/intern/GHOST_EventButton.hh
similarity index 95%
rename from intern/ghost/intern/GHOST_EventButton.h
rename to intern/ghost/intern/GHOST_EventButton.hh
index f42805e2c6b..c62fa79387f 100644
--- a/intern/ghost/intern/GHOST_EventButton.h
+++ b/intern/ghost/intern/GHOST_EventButton.hh
@@ -8,8 +8,8 @@
 
 #pragma once
 
-#include "GHOST_Event.h"
-#include "GHOST_Window.h"
+#include "GHOST_Event.hh"
+#include "GHOST_Window.hh"
 
 /**
  * Mouse button event.
diff --git a/intern/ghost/intern/GHOST_EventCursor.h b/intern/ghost/intern/GHOST_EventCursor.hh
similarity index 97%
rename from intern/ghost/intern/GHOST_EventCursor.h
rename to intern/ghost/intern/GHOST_EventCursor.hh
index a9e834e6531..8909ba095c8 100644
--- a/intern/ghost/intern/GHOST_EventCursor.h
+++ b/intern/ghost/intern/GHOST_EventCursor.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "GHOST_Event.h"
+#include "GHOST_Event.hh"
 
 /**
  * Cursor event.
diff --git a/intern/ghost/intern/GHOST_EventDragnDrop.h b/intern/ghost/intern/GHOST_EventDragnDrop.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_EventDragnDrop.h
rename to intern/ghost/intern/GHOST_EventDragnDrop.hh
index 3e703731ced..cebbaa6fe4e 100644
--- a/intern/ghost/intern/GHOST_EventDragnDrop.h
+++ b/intern/ghost/intern/GHOST_EventDragnDrop.hh
@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include "GHOST_Event.h"
+#include "GHOST_Event.hh"
 extern "C" {
 #include "IMB_imbuf.h"
 #include "IMB_imbuf_types.h"
diff --git a/intern/ghost/intern/GHOST_EventKey.h b/intern/ghost/intern/GHOST_EventKey.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_EventKey.h
rename to intern/ghost/intern/GHOST_EventKey.hh
index f85a674be9f..aed83c9a06f 100644
--- a/intern/ghost/intern/GHOST_EventKey.h
+++ b/intern/ghost/intern/GHOST_EventKey.hh
@@ -10,7 +10,7 @@
 
 #include <string.h>
 
-#include "GHOST_Event.h"
+#include "GHOST_Event.hh"
 
 /**
  * Key event.
diff --git a/intern/ghost/intern/GHOST_EventManager.cpp b/intern/ghost/intern/GHOST_EventManager.cc
similarity index 98%
rename from intern/ghost/intern/GHOST_EventManager.cpp
rename to intern/ghost/intern/GHOST_EventManager.cc
index 90897b0e54c..2daf4030104 100644
--- a/intern/ghost/intern/GHOST_EventManager.cpp
+++ b/intern/ghost/intern/GHOST_EventManager.cc
@@ -9,8 +9,8 @@
  * Copyright (C) 2001 NaN Technologies B.V.
  */
 
-#include "GHOST_EventManager.h"
-#include "GHOST_Debug.h"
+#include "GHOST_EventManager.hh"
+#include "GHOST_Debug.hh"
 #include <algorithm>
 
 GHOST_EventManager::GHOST_EventManager() {}
diff --git a/intern/ghost/intern/GHOST_EventManager.h b/intern/ghost/intern/GHOST_EventManager.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_EventManager.h
rename to intern/ghost/intern/GHOST_EventManager.hh
index 32666ff57c8..37460257242 100644
--- a/intern/ghost/intern/GHOST_EventManager.h
+++ b/intern/ghost/intern/GHOST_EventManager.hh
@@ -11,7 +11,7 @@
 #include <deque>
 #include <vector>
 
-#include "GHOST_IEventConsumer.h"
+#include "GHOST_IEventConsumer.hh"
 
 /**
  * Manages an event stack and a list of event consumers.
diff --git a/intern/ghost/intern/GHOST_EventNDOF.h b/intern/ghost/intern/GHOST_EventNDOF.hh
similarity index 96%
rename from intern/ghost/intern/GHOST_EventNDOF.h
rename to intern/ghost/intern/GHOST_EventNDOF.hh
index 79a8974a07a..b2f280019f0 100644
--- a/intern/ghost/intern/GHOST_EventNDOF.h
+++ b/intern/ghost/intern/GHOST_EventNDOF.hh
@@ -10,7 +10,7 @@
 #  error NDOF code included in non-NDOF-enabled build
 #endif
 
-#include "GHOST_Event.h"
+#include "GHOST_Event.hh"
 
 class GHOST_EventNDOFMotion : public GHOST_Event {
  protected:
diff --git a/intern/ghost/intern/GHOST_EventPrinter.cpp b/intern/ghost/intern/GHOST_EventPrinter.cc
similarity index 98%
rename from intern/ghost/intern/GHOST_EventPrinter.cpp
rename to intern/ghost/intern/GHOST_EventPrinter.cc
index 0d7f05009ff..99a56e206b5 100644
--- a/intern/ghost/intern/GHOST_EventPrinter.cpp
+++ b/intern/ghost/intern/GHOST_EventPrinter.cc
@@ -6,10 +6,10 @@
  * Declaration of GHOST_EventPrinter class.
  */
 
-#include "GHOST_EventPrinter.h"
-#include "GHOST_Debug.h"
-#include "GHOST_EventDragnDrop.h"
-#include "GHOST_EventKey.h"
+#include "GHOST_EventPrinter.hh"
+#include "GHOST_Debug.hh"
+#include "GHOST_EventDragnDrop.hh"
+#include "GHOST_EventKey.hh"
 #include <iostream>
 
 #include <cstdio>
diff --git a/intern/ghost/intern/GHOST_EventPrinter.h b/intern/ghost/intern/GHOST_EventPrinter.hh
similarity index 96%
rename from intern/ghost/intern/GHOST_EventPrinter.h
rename to intern/ghost/intern/GHOST_EventPrinter.hh
index dfa35f72026..9b8cc509975 100644
--- a/intern/ghost/intern/GHOST_EventPrinter.h
+++ b/intern/ghost/intern/GHOST_EventPrinter.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "GHOST_IEventConsumer.h"
+#include "GHOST_IEventConsumer.hh"
 
 /**
  * An Event consumer that prints all the events to standard out.
diff --git a/intern/ghost/intern/GHOST_EventString.h b/intern/ghost/intern/GHOST_EventString.hh
similarity index 97%
rename from intern/ghost/intern/GHOST_EventString.h
rename to intern/ghost/intern/GHOST_EventString.hh
index fa59462b32b..116d5057559 100644
--- a/intern/ghost/intern/GHOST_EventString.h
+++ b/intern/ghost/intern/GHOST_EventString.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "GHOST_Event.h"
+#include "GHOST_Event.hh"
 
 /**
  * Generic class for events with string data
diff --git a/intern/ghost/intern/GHOST_EventTrackpad.h b/intern/ghost/intern/GHOST_EventTrackpad.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_EventTrackpad.h
rename to intern/ghost/intern/GHOST_EventTrackpad.hh
index 4b98514eeef..0bc355e7ac5 100644
--- a/intern/ghost/intern/GHOST_EventTrackpad.h
+++ b/intern/ghost/intern/GHOST_EventTrackpad.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "GHOST_Event.h"
+#include "GHOST_Event.hh"
 
 /**
  * Trackpad (scroll, magnify, rotate, ...) event.
diff --git a/intern/ghost/intern/GHOST_EventWheel.h b/intern/ghost/intern/GHOST_EventWheel.hh
similarity index 97%
rename from intern/ghost/intern/GHOST_EventWheel.h
rename to intern/ghost/intern/GHOST_EventWheel.hh
index 7c32d575e67..e7086f2c1e4 100644
--- a/intern/ghost/intern/GHOST_EventWheel.h
+++ b/intern/ghost/intern/GHOST_EventWheel.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "GHOST_Event.h"
+#include "GHOST_Event.hh"
 
 /**
  * Mouse wheel event.
diff --git a/intern/ghost/intern/GHOST_ISystem.cpp b/intern/ghost/intern/GHOST_ISystem.cc
similarity index 94%
rename from intern/ghost/intern/GHOST_ISystem.cpp
rename to intern/ghost/intern/GHOST_ISystem.cc
index 696848ce623..5b0d9c7af99 100644
--- a/intern/ghost/intern/GHOST_ISystem.cpp
+++ b/intern/ghost/intern/GHOST_ISystem.cc
@@ -11,22 +11,22 @@
 
 #include <stdexcept>
 
-#include "GHOST_ISystem.h"
-#include "GHOST_SystemHeadless.h"
+#include "GHOST_ISystem.hh"
+#include "GHOST_SystemHeadless.hh"
 
 #if defined(WITH_GHOST_X11) && defined(WITH_GHOST_WAYLAND)
-#  include "GHOST_SystemWayland.h"
-#  include "GHOST_SystemX11.h"
+#  include "GHOST_SystemWayland.hh"
+#  include "GHOST_SystemX11.hh"
 #elif defined(WITH_GHOST_X11)
-#  include "GHOST_SystemX11.h"
+#  include "GHOST_SystemX11.hh"
 #elif defined(WITH_GHOST_WAYLAND)
-#  include "GHOST_SystemWayland.h"
+#  include "GHOST_SystemWayland.hh"
 #elif defined(WITH_GHOST_SDL)
-#  include "GHOST_SystemSDL.h"
+#  include "GHOST_SystemSDL.hh"
 #elif defined(WIN32)
-#  include "GHOST_SystemWin32.h"
+#  include "GHOST_SystemWin32.hh"
 #elif defined(__APPLE__)
-#  include "GHOST_SystemCocoa.h"
+#  include "GHOST_SystemCocoa.hh"
 #endif
 
 GHOST_ISystem *GHOST_ISystem::m_system = nullptr;
diff --git a/intern/ghost/intern/GHOST_ISystemPaths.cpp b/intern/ghost/intern/GHOST_ISystemPaths.cc
similarity index 88%
rename from intern/ghost/intern/GHOST_ISystemPaths.cpp
rename to intern/ghost/intern/GHOST_ISystemPaths.cc
index 599a9fec681..b6359fcb5a1 100644
--- a/intern/ghost/intern/GHOST_ISystemPaths.cpp
+++ b/intern/ghost/intern/GHOST_ISystemPaths.cc
@@ -9,15 +9,15 @@
  * Copyright (C) 2001 NaN Technologies B.V.
  */
 
-#include "GHOST_ISystemPaths.h"
+#include "GHOST_ISystemPaths.hh"
 
 #ifdef WIN32
-#  include "GHOST_SystemPathsWin32.h"
+#  include "GHOST_SystemPathsWin32.hh"
 #else
 #  ifdef __APPLE__
-#    include "GHOST_SystemPathsCocoa.h"
+#    include "GHOST_SystemPathsCocoa.hh"
 #  else
-#    include "GHOST_SystemPathsUnix.h"
+#    include "GHOST_SystemPathsUnix.hh"
 #  endif
 #endif
 
diff --git a/intern/ghost/intern/GHOST_IXrGraphicsBinding.h b/intern/ghost/intern/GHOST_IXrGraphicsBinding.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_IXrGraphicsBinding.h
rename to intern/ghost/intern/GHOST_IXrGraphicsBinding.hh
index 152b6b68026..ee92f90ca5d 100644
--- a/intern/ghost/intern/GHOST_IXrGraphicsBinding.h
+++ b/intern/ghost/intern/GHOST_IXrGraphicsBinding.hh
@@ -11,7 +11,7 @@
 #include <string>
 #include <vector>
 
-#include "GHOST_Xr_openxr_includes.h"
+#include "GHOST_Xr_openxr_includes.hh"
 
 class GHOST_IXrGraphicsBinding {
  public:
diff --git a/intern/ghost/intern/GHOST_IconX11.h b/intern/ghost/intern/GHOST_IconX11.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_IconX11.h
rename to intern/ghost/intern/GHOST_IconX11.hh
diff --git a/intern/ghost/intern/GHOST_ImeWin32.cpp b/intern/ghost/intern/GHOST_ImeWin32.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_ImeWin32.cpp
rename to intern/ghost/intern/GHOST_ImeWin32.cc
index ccc25b0ec28..54171130ca3 100644
--- a/intern/ghost/intern/GHOST_ImeWin32.cpp
+++ b/intern/ghost/intern/GHOST_ImeWin32.cc
@@ -7,9 +7,9 @@
 
 #ifdef WITH_INPUT_IME
 
-#  include "GHOST_ImeWin32.h"
+#  include "GHOST_ImeWin32.hh"
 #  include "GHOST_C-api.h"
-#  include "GHOST_WindowWin32.h"
+#  include "GHOST_WindowWin32.hh"
 #  include "utfconv.h"
 
 /* ISO_639-1 2-Letter Abbreviations. */
diff --git a/intern/ghost/intern/GHOST_ImeWin32.h b/intern/ghost/intern/GHOST_ImeWin32.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_ImeWin32.h
rename to intern/ghost/intern/GHOST_ImeWin32.hh
index cb6d8a770cf..933b0f8c5fe 100644
--- a/intern/ghost/intern/GHOST_ImeWin32.h
+++ b/intern/ghost/intern/GHOST_ImeWin32.hh
@@ -14,8 +14,8 @@
 
 #  include <string>
 
-#  include "GHOST_Event.h"
-#  include "GHOST_Rect.h"
+#  include "GHOST_Event.hh"
+#  include "GHOST_Rect.hh"
 #  include <vector>
 
 /* MSDN LOCALE_SISO639LANGNAME states maximum length of 9, including terminating null. */
diff --git a/intern/ghost/intern/GHOST_ModifierKeys.cpp b/intern/ghost/intern/GHOST_ModifierKeys.cc
similarity index 98%
rename from intern/ghost/intern/GHOST_ModifierKeys.cpp
rename to intern/ghost/intern/GHOST_ModifierKeys.cc
index 86f483c2d14..b721182da6e 100644
--- a/intern/ghost/intern/GHOST_ModifierKeys.cpp
+++ b/intern/ghost/intern/GHOST_ModifierKeys.cc
@@ -9,8 +9,8 @@
  * Copyright (C) 2001 NaN Technologies B.V.
  */
 
-#include "GHOST_ModifierKeys.h"
-#include "GHOST_Debug.h"
+#include "GHOST_ModifierKeys.hh"
+#include "GHOST_Debug.hh"
 
 GHOST_ModifierKeys::GHOST_ModifierKeys()
 {
diff --git a/intern/ghost/intern/GHOST_ModifierKeys.h b/intern/ghost/intern/GHOST_ModifierKeys.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_ModifierKeys.h
rename to intern/ghost/intern/GHOST_ModifierKeys.hh
diff --git a/intern/ghost/intern/GHOST_NDOFManager.cpp b/intern/ghost/intern/GHOST_NDOFManager.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_NDOFManager.cpp
rename to intern/ghost/intern/GHOST_NDOFManager.cc
index d0309b4bba3..05724bd88f6 100644
--- a/intern/ghost/intern/GHOST_NDOFManager.cpp
+++ b/intern/ghost/intern/GHOST_NDOFManager.cc
@@ -1,11 +1,11 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
 
-#include "GHOST_NDOFManager.h"
-#include "GHOST_Debug.h"
-#include "GHOST_EventKey.h"
-#include "GHOST_EventNDOF.h"
-#include "GHOST_WindowManager.h"
-#include "GHOST_utildefines.h"
+#include "GHOST_NDOFManager.hh"
+#include "GHOST_Debug.hh"
+#include "GHOST_EventKey.hh"
+#include "GHOST_EventNDOF.hh"
+#include "GHOST_WindowManager.hh"
+#include "GHOST_utildefines.hh"
 
 /* Logging, use `ghost.ndof.*` prefix. */
 #include "CLG_log.h"
diff --git a/intern/ghost/intern/GHOST_NDOFManager.h b/intern/ghost/intern/GHOST_NDOFManager.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_NDOFManager.h
rename to intern/ghost/intern/GHOST_NDOFManager.hh
index 26b0138cffa..4bdcc62b75d 100644
--- a/intern/ghost/intern/GHOST_NDOFManager.h
+++ b/intern/ghost/intern/GHOST_NDOFManager.hh
@@ -6,7 +6,7 @@
 #  error NDOF code included in non-NDOF-enabled build
 #endif
 
-#include "GHOST_System.h"
+#include "GHOST_System.hh"
 
 typedef enum {
   NDOF_UnknownDevice = 0,
diff --git a/intern/ghost/intern/GHOST_NDOFManagerCocoa.h b/intern/ghost/intern/GHOST_NDOFManagerCocoa.hh
similarity index 91%
rename from intern/ghost/intern/GHOST_NDOFManagerCocoa.h
rename to intern/ghost/intern/GHOST_NDOFManagerCocoa.hh
index a40406ad2d0..ec873849bc8 100644
--- a/intern/ghost/intern/GHOST_NDOFManagerCocoa.h
+++ b/intern/ghost/intern/GHOST_NDOFManagerCocoa.hh
@@ -2,7 +2,7 @@
 
 #pragma once
 
-#include "GHOST_NDOFManager.h"
+#include "GHOST_NDOFManager.hh"
 
 // Event capture is handled within the NDOF manager on Macintosh,
 // so there's no need for SystemCocoa to look for them.
diff --git a/intern/ghost/intern/GHOST_NDOFManagerCocoa.mm b/intern/ghost/intern/GHOST_NDOFManagerCocoa.mm
index 6f8208915d8..e699fdfe330 100644
--- a/intern/ghost/intern/GHOST_NDOFManagerCocoa.mm
+++ b/intern/ghost/intern/GHOST_NDOFManagerCocoa.mm
@@ -2,8 +2,8 @@
 
 #define DEBUG_NDOF_DRIVER false
 
-#include "GHOST_NDOFManagerCocoa.h"
-#include "GHOST_SystemCocoa.h"
+#include "GHOST_NDOFManagerCocoa.hh"
+#include "GHOST_SystemCocoa.hh"
 
 #include <dlfcn.h>
 #include <stdint.h>
diff --git a/intern/ghost/intern/GHOST_NDOFManagerUnix.cpp b/intern/ghost/intern/GHOST_NDOFManagerUnix.cc
similarity index 98%
rename from intern/ghost/intern/GHOST_NDOFManagerUnix.cpp
rename to intern/ghost/intern/GHOST_NDOFManagerUnix.cc
index d3b4161307e..98a3fa0786f 100644
--- a/intern/ghost/intern/GHOST_NDOFManagerUnix.cpp
+++ b/intern/ghost/intern/GHOST_NDOFManagerUnix.cc
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
 
-#include "GHOST_NDOFManagerUnix.h"
-#include "GHOST_System.h"
+#include "GHOST_NDOFManagerUnix.hh"
+#include "GHOST_System.hh"
 
 /* Logging, use `ghost.ndof.unix.*` prefix. */
 #include "CLG_log.h"
diff --git a/intern/ghost/intern/GHOST_NDOFManagerUnix.h b/intern/ghost/intern/GHOST_NDOFManagerUnix.hh
similarity index 92%
rename from intern/ghost/intern/GHOST_NDOFManagerUnix.h
rename to intern/ghost/intern/GHOST_NDOFManagerUnix.hh
index 2b98fad974f..b6d306bb561 100644
--- a/intern/ghost/intern/GHOST_NDOFManagerUnix.h
+++ b/intern/ghost/intern/GHOST_NDOFManagerUnix.hh
@@ -2,7 +2,7 @@
 
 #pragma once
 
-#include "GHOST_NDOFManager.h"
+#include "GHOST_NDOFManager.hh"
 
 /* Event capture is handled within the NDOF manager on Linux,
  * so there's no need for SystemX11 to look for them. */
diff --git a/intern/ghost/intern/GHOST_NDOFManagerWin32.cpp b/intern/ghost/intern/GHOST_NDOFManagerWin32.cc
similarity index 91%
rename from intern/ghost/intern/GHOST_NDOFManagerWin32.cpp
rename to intern/ghost/intern/GHOST_NDOFManagerWin32.cc
index 43f31cb2368..68819e5f391 100644
--- a/intern/ghost/intern/GHOST_NDOFManagerWin32.cpp
+++ b/intern/ghost/intern/GHOST_NDOFManagerWin32.cc
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later */
 
-#include "GHOST_NDOFManagerWin32.h"
+#include "GHOST_NDOFManagerWin32.hh"
 
 GHOST_NDOFManagerWin32::GHOST_NDOFManagerWin32(GHOST_System &sys) : GHOST_NDOFManager(sys)
 {
diff --git a/intern/ghost/intern/GHOST_NDOFManagerWin32.h b/intern/ghost/intern/GHOST_NDOFManagerWin32.hh
similarity index 85%
rename from intern/ghost/intern/GHOST_NDOFManagerWin32.h
rename to intern/ghost/intern/GHOST_NDOFManagerWin32.hh
index 1da269d23da..a1cfedcb61d 100644
--- a/intern/ghost/intern/GHOST_NDOFManagerWin32.h
+++ b/intern/ghost/intern/GHOST_NDOFManagerWin32.hh
@@ -2,7 +2,7 @@
 
 #pragma once
 
-#include "GHOST_NDOFManager.h"
+#include "GHOST_NDOFManager.hh"
 
 class GHOST_NDOFManagerWin32 : public GHOST_NDOFManager {
  public:
diff --git a/intern/ghost/intern/GHOST_Path-api.cpp b/intern/ghost/intern/GHOST_Path-api.cc
similarity index 93%
rename from intern/ghost/intern/GHOST_Path-api.cpp
rename to intern/ghost/intern/GHOST_Path-api.cc
index 66ade104005..ec1cc24dabf 100644
--- a/intern/ghost/intern/GHOST_Path-api.cpp
+++ b/intern/ghost/intern/GHOST_Path-api.cc
@@ -7,10 +7,10 @@
 
 #include <cstdio>
 
-#include "GHOST_ISystemPaths.h"
-#include "GHOST_Path-api.h"
+#include "GHOST_ISystemPaths.hh"
+#include "GHOST_Path-api.hh"
 #include "GHOST_Types.h"
-#include "intern/GHOST_Debug.h"
+#include "intern/GHOST_Debug.hh"
 
 GHOST_TSuccess GHOST_CreateSystemPaths()
 {
diff --git a/intern/ghost/intern/GHOST_PathUtils.cpp b/intern/ghost/intern/GHOST_PathUtils.cc
similarity index 98%
rename from intern/ghost/intern/GHOST_PathUtils.cpp
rename to intern/ghost/intern/GHOST_PathUtils.cc
index fb42938fb87..3856f35ee8a 100644
--- a/intern/ghost/intern/GHOST_PathUtils.cpp
+++ b/intern/ghost/intern/GHOST_PathUtils.cc
@@ -11,7 +11,7 @@
 #include <cstdlib>
 #include <cstring>
 
-#include "GHOST_PathUtils.h"
+#include "GHOST_PathUtils.hh"
 #include "GHOST_Types.h"
 
 /* Based on: https://stackoverflow.com/a/2766963/432509 */
diff --git a/intern/ghost/intern/GHOST_PathUtils.h b/intern/ghost/intern/GHOST_PathUtils.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_PathUtils.h
rename to intern/ghost/intern/GHOST_PathUtils.hh
diff --git a/intern/ghost/intern/GHOST_Rect.cpp b/intern/ghost/intern/GHOST_Rect.cc
similarity index 98%
rename from intern/ghost/intern/GHOST_Rect.cpp
rename to intern/ghost/intern/GHOST_Rect.cc
index c425b21cd27..db59a14b3f8 100644
--- a/intern/ghost/intern/GHOST_Rect.cpp
+++ b/intern/ghost/intern/GHOST_Rect.cc
@@ -5,7 +5,7 @@
  * \ingroup GHOST
  */
 
-#include "GHOST_Rect.h"
+#include "GHOST_Rect.hh"
 
 void GHOST_Rect::inset(int32_t i)
 {
diff --git a/intern/ghost/intern/GHOST_System.cpp b/intern/ghost/intern/GHOST_System.cc
similarity index 98%
rename from intern/ghost/intern/GHOST_System.cpp
rename to intern/ghost/intern/GHOST_System.cc
index 9094e5a5b97..d146e7cee78 100644
--- a/intern/ghost/intern/GHOST_System.cpp
+++ b/intern/ghost/intern/GHOST_System.cc
@@ -5,19 +5,19 @@
  * \ingroup GHOST
  */
 
-#include "GHOST_System.h"
+#include "GHOST_System.hh"
 
 #include <chrono>
 #include <cstdio> /* Just for #printf. */
 
-#include "GHOST_DisplayManager.h"
-#include "GHOST_EventManager.h"
-#include "GHOST_TimerManager.h"
-#include "GHOST_TimerTask.h"
-#include "GHOST_WindowManager.h"
+#include "GHOST_DisplayManager.hh"
+#include "GHOST_EventManager.hh"
+#include "GHOST_TimerManager.hh"
+#include "GHOST_TimerTask.hh"
+#include "GHOST_WindowManager.hh"
 
 #ifdef WITH_INPUT_NDOF
-#  include "GHOST_NDOFManager.h"
+#  include "GHOST_NDOFManager.hh"
 #endif
 
 GHOST_System::GHOST_System()
diff --git a/intern/ghost/intern/GHOST_System.h b/intern/ghost/intern/GHOST_System.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_System.h
rename to intern/ghost/intern/GHOST_System.hh
index a319f553231..9ede2fda862 100644
--- a/intern/ghost/intern/GHOST_System.h
+++ b/intern/ghost/intern/GHOST_System.hh
@@ -8,14 +8,14 @@
 
 #pragma once
 
-#include "GHOST_ISystem.h"
+#include "GHOST_ISystem.hh"
 
-#include "GHOST_Buttons.h"
-#include "GHOST_Debug.h"
-#include "GHOST_EventManager.h"
-#include "GHOST_ModifierKeys.h"
+#include "GHOST_Buttons.hh"
+#include "GHOST_Debug.hh"
+#include "GHOST_EventManager.hh"
+#include "GHOST_ModifierKeys.hh"
 #ifdef WITH_GHOST_DEBUG
-#  include "GHOST_EventPrinter.h"
+#  include "GHOST_EventPrinter.hh"
 #endif  // WITH_GHOST_DEBUG
 
 class GHOST_DisplayManager;
diff --git a/intern/ghost/intern/GHOST_SystemCocoa.h b/intern/ghost/intern/GHOST_SystemCocoa.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_SystemCocoa.h
rename to intern/ghost/intern/GHOST_SystemCocoa.hh
index 2a9056619be..af574cc4980 100644
--- a/intern/ghost/intern/GHOST_SystemCocoa.h
+++ b/intern/ghost/intern/GHOST_SystemCocoa.hh
@@ -14,7 +14,7 @@
 
 //#define __CARBONSOUND__
 
-#include "GHOST_System.h"
+#include "GHOST_System.hh"
 
 class GHOST_EventCursor;
 class GHOST_EventKey;
diff --git a/intern/ghost/intern/GHOST_SystemCocoa.mm b/intern/ghost/intern/GHOST_SystemCocoa.mm
index 1451f2ed62d..166f6d938ee 100644
--- a/intern/ghost/intern/GHOST_SystemCocoa.mm
+++ b/intern/ghost/intern/GHOST_SystemCocoa.mm
@@ -1,20 +1,20 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later
  * Copyright 2001-2002 NaN Holding BV. All rights reserved. */
 
-#include "GHOST_SystemCocoa.h"
+#include "GHOST_SystemCocoa.hh"
 
-#include "GHOST_DisplayManagerCocoa.h"
-#include "GHOST_EventButton.h"
-#include "GHOST_EventCursor.h"
-#include "GHOST_EventDragnDrop.h"
-#include "GHOST_EventKey.h"
-#include "GHOST_EventString.h"
-#include "GHOST_EventTrackpad.h"
-#include "GHOST_EventWheel.h"
-#include "GHOST_TimerManager.h"
-#include "GHOST_TimerTask.h"
-#include "GHOST_WindowCocoa.h"
-#include "GHOST_WindowManager.h"
+#include "GHOST_DisplayManagerCocoa.hh"
+#include "GHOST_EventButton.hh"
+#include "GHOST_EventCursor.hh"
+#include "GHOST_EventDragnDrop.hh"
+#include "GHOST_EventKey.hh"
+#include "GHOST_EventString.hh"
+#include "GHOST_EventTrackpad.hh"
+#include "GHOST_EventWheel.hh"
+#include "GHOST_TimerManager.hh"
+#include "GHOST_TimerTask.hh"
+#include "GHOST_WindowCocoa.hh"
+#include "GHOST_WindowManager.hh"
 
 /* Don't generate OpenGL deprecation warning. This is a known thing, and is not something easily
  * solvable in a short term. */
@@ -22,14 +22,14 @@
 #  pragma clang diagnostic ignored "-Wdeprecated-declarations"
 #endif
 
-#include "GHOST_ContextCGL.h"
+#include "GHOST_ContextCGL.hh"
 
 #ifdef WITH_VULKAN_BACKEND
-#  include "GHOST_ContextVK.h"
+#  include "GHOST_ContextVK.hh"
 #endif
 
 #ifdef WITH_INPUT_NDOF
-#  include "GHOST_NDOFManagerCocoa.h"
+#  include "GHOST_NDOFManagerCocoa.hh"
 #endif
 
 #include "AssertMacros.h"
diff --git a/intern/ghost/intern/GHOST_SystemHeadless.h b/intern/ghost/intern/GHOST_SystemHeadless.hh
similarity index 96%
rename from intern/ghost/intern/GHOST_SystemHeadless.h
rename to intern/ghost/intern/GHOST_SystemHeadless.hh
index 02a09dd6c9e..feefbe264d6 100644
--- a/intern/ghost/intern/GHOST_SystemHeadless.h
+++ b/intern/ghost/intern/GHOST_SystemHeadless.hh
@@ -8,14 +8,14 @@
 #pragma once
 
 #include "../GHOST_Types.h"
-#include "GHOST_DisplayManagerNULL.h"
-#include "GHOST_System.h"
-#include "GHOST_WindowNULL.h"
+#include "GHOST_DisplayManagerNULL.hh"
+#include "GHOST_System.hh"
+#include "GHOST_WindowNULL.hh"
 
 #ifdef __linux__
-#  include "GHOST_ContextEGL.h"
+#  include "GHOST_ContextEGL.hh"
 #endif
-#include "GHOST_ContextNone.h"
+#include "GHOST_ContextNone.hh"
 
 class GHOST_WindowNULL;
 
diff --git a/intern/ghost/intern/GHOST_SystemPaths.h b/intern/ghost/intern/GHOST_SystemPaths.hh
similarity index 97%
rename from intern/ghost/intern/GHOST_SystemPaths.h
rename to intern/ghost/intern/GHOST_SystemPaths.hh
index 2dadcd35883..01089e86203 100644
--- a/intern/ghost/intern/GHOST_SystemPaths.h
+++ b/intern/ghost/intern/GHOST_SystemPaths.hh
@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include "GHOST_ISystemPaths.h"
+#include "GHOST_ISystemPaths.hh"
 
 class GHOST_SystemPaths : public GHOST_ISystemPaths {
  protected:
diff --git a/intern/ghost/intern/GHOST_SystemPathsCocoa.h b/intern/ghost/intern/GHOST_SystemPathsCocoa.hh
similarity index 97%
rename from intern/ghost/intern/GHOST_SystemPathsCocoa.h
rename to intern/ghost/intern/GHOST_SystemPathsCocoa.hh
index 3c95cb57243..95b4790ea85 100644
--- a/intern/ghost/intern/GHOST_SystemPathsCocoa.h
+++ b/intern/ghost/intern/GHOST_SystemPathsCocoa.hh
@@ -11,7 +11,7 @@
 #  error Apple OSX only!
 #endif  // __APPLE__
 
-#include "GHOST_SystemPaths.h"
+#include "GHOST_SystemPaths.hh"
 
 class GHOST_SystemPathsCocoa : public GHOST_SystemPaths {
  public:
diff --git a/intern/ghost/intern/GHOST_SystemPathsCocoa.mm b/intern/ghost/intern/GHOST_SystemPathsCocoa.mm
index 7a26b40be36..e4f003d2cee 100644
--- a/intern/ghost/intern/GHOST_SystemPathsCocoa.mm
+++ b/intern/ghost/intern/GHOST_SystemPathsCocoa.mm
@@ -3,8 +3,8 @@
 
 #import <Foundation/Foundation.h>
 
-#include "GHOST_Debug.h"
-#include "GHOST_SystemPathsCocoa.h"
+#include "GHOST_Debug.hh"
+#include "GHOST_SystemPathsCocoa.hh"
 
 #pragma mark initialization/finalization
 
diff --git a/intern/ghost/intern/GHOST_SystemPathsUnix.cpp b/intern/ghost/intern/GHOST_SystemPathsUnix.cc
similarity index 98%
rename from intern/ghost/intern/GHOST_SystemPathsUnix.cpp
rename to intern/ghost/intern/GHOST_SystemPathsUnix.cc
index f0392a8ec73..1c1bad320dc 100644
--- a/intern/ghost/intern/GHOST_SystemPathsUnix.cpp
+++ b/intern/ghost/intern/GHOST_SystemPathsUnix.cc
@@ -7,9 +7,9 @@
 
 #include <sstream>
 
-#include "GHOST_SystemPathsUnix.h"
+#include "GHOST_SystemPathsUnix.hh"
 
-#include "GHOST_Debug.h"
+#include "GHOST_Debug.hh"
 
 /* For timing. */
 #include <sys/time.h>
diff --git a/intern/ghost/intern/GHOST_SystemPathsUnix.h b/intern/ghost/intern/GHOST_SystemPathsUnix.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_SystemPathsUnix.h
rename to intern/ghost/intern/GHOST_SystemPathsUnix.hh
index e220faf7c2e..d9b9b5a9e05 100644
--- a/intern/ghost/intern/GHOST_SystemPathsUnix.h
+++ b/intern/ghost/intern/GHOST_SystemPathsUnix.hh
@@ -8,7 +8,7 @@
 #pragma once
 
 #include "../GHOST_Types.h"
-#include "GHOST_SystemPaths.h"
+#include "GHOST_SystemPaths.hh"
 
 class GHOST_SystemPathsUnix : public GHOST_SystemPaths {
  public:
diff --git a/intern/ghost/intern/GHOST_SystemPathsWin32.cpp b/intern/ghost/intern/GHOST_SystemPathsWin32.cc
similarity index 98%
rename from intern/ghost/intern/GHOST_SystemPathsWin32.cpp
rename to intern/ghost/intern/GHOST_SystemPathsWin32.cc
index 636ced8d88d..c9740483803 100644
--- a/intern/ghost/intern/GHOST_SystemPathsWin32.cpp
+++ b/intern/ghost/intern/GHOST_SystemPathsWin32.cc
@@ -5,8 +5,8 @@
  * \ingroup GHOST
  */
 
-#include "GHOST_SystemPathsWin32.h"
-#include "GHOST_Debug.h"
+#include "GHOST_SystemPathsWin32.hh"
+#include "GHOST_Debug.hh"
 
 #ifndef _WIN32_IE
 #  define _WIN32_IE 0x0501
diff --git a/intern/ghost/intern/GHOST_SystemPathsWin32.h b/intern/ghost/intern/GHOST_SystemPathsWin32.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_SystemPathsWin32.h
rename to intern/ghost/intern/GHOST_SystemPathsWin32.hh
index 13694e225e7..e15f1958319 100644
--- a/intern/ghost/intern/GHOST_SystemPathsWin32.h
+++ b/intern/ghost/intern/GHOST_SystemPathsWin32.hh
@@ -14,7 +14,7 @@
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 
-#include "GHOST_SystemPaths.h"
+#include "GHOST_SystemPaths.hh"
 
 /**
  * WIN32 Implementation of GHOST_SystemPaths class.
diff --git a/intern/ghost/intern/GHOST_SystemSDL.cpp b/intern/ghost/intern/GHOST_SystemSDL.cc
similarity index 98%
rename from intern/ghost/intern/GHOST_SystemSDL.cpp
rename to intern/ghost/intern/GHOST_SystemSDL.cc
index 4e82f1d10c8..b99d2091054 100644
--- a/intern/ghost/intern/GHOST_SystemSDL.cpp
+++ b/intern/ghost/intern/GHOST_SystemSDL.cc
@@ -7,16 +7,16 @@
 #include <cassert>
 #include <stdexcept>
 
-#include "GHOST_ContextSDL.h"
-#include "GHOST_SystemSDL.h"
-#include "GHOST_WindowSDL.h"
+#include "GHOST_ContextSDL.hh"
+#include "GHOST_SystemSDL.hh"
+#include "GHOST_WindowSDL.hh"
 
-#include "GHOST_WindowManager.h"
+#include "GHOST_WindowManager.hh"
 
-#include "GHOST_EventButton.h"
-#include "GHOST_EventCursor.h"
-#include "GHOST_EventKey.h"
-#include "GHOST_EventWheel.h"
+#include "GHOST_EventButton.hh"
+#include "GHOST_EventCursor.hh"
+#include "GHOST_EventKey.hh"
+#include "GHOST_EventWheel.hh"
 
 GHOST_SystemSDL::GHOST_SystemSDL() : GHOST_System()
 {
diff --git a/intern/ghost/intern/GHOST_SystemSDL.h b/intern/ghost/intern/GHOST_SystemSDL.hh
similarity index 93%
rename from intern/ghost/intern/GHOST_SystemSDL.h
rename to intern/ghost/intern/GHOST_SystemSDL.hh
index 261fc2d2d68..67e093f3ddd 100644
--- a/intern/ghost/intern/GHOST_SystemSDL.h
+++ b/intern/ghost/intern/GHOST_SystemSDL.hh
@@ -8,11 +8,11 @@
 #pragma once
 
 #include "../GHOST_Types.h"
-#include "GHOST_DisplayManagerSDL.h"
-#include "GHOST_Event.h"
-#include "GHOST_System.h"
-#include "GHOST_TimerManager.h"
-#include "GHOST_WindowSDL.h"
+#include "GHOST_DisplayManagerSDL.hh"
+#include "GHOST_Event.hh"
+#include "GHOST_System.hh"
+#include "GHOST_TimerManager.hh"
+#include "GHOST_WindowSDL.hh"
 
 extern "C" {
 #include "SDL.h"
diff --git a/intern/ghost/intern/GHOST_SystemWayland.cpp b/intern/ghost/intern/GHOST_SystemWayland.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_SystemWayland.cpp
rename to intern/ghost/intern/GHOST_SystemWayland.cc
index 00474b38351..603b8802665 100644
--- a/intern/ghost/intern/GHOST_SystemWayland.cpp
+++ b/intern/ghost/intern/GHOST_SystemWayland.cc
@@ -4,28 +4,28 @@
  * \ingroup GHOST
  */
 
-#include "GHOST_SystemWayland.h"
-#include "GHOST_Event.h"
-#include "GHOST_EventButton.h"
-#include "GHOST_EventCursor.h"
-#include "GHOST_EventDragnDrop.h"
-#include "GHOST_EventKey.h"
-#include "GHOST_EventTrackpad.h"
-#include "GHOST_EventWheel.h"
-#include "GHOST_PathUtils.h"
-#include "GHOST_TimerManager.h"
-#include "GHOST_WaylandUtils.h"
-#include "GHOST_WindowManager.h"
-#include "GHOST_utildefines.h"
+#include "GHOST_SystemWayland.hh"
+#include "GHOST_Event.hh"
+#include "GHOST_EventButton.hh"
+#include "GHOST_EventCursor.hh"
+#include "GHOST_EventDragnDrop.hh"
+#include "GHOST_EventKey.hh"
+#include "GHOST_EventTrackpad.hh"
+#include "GHOST_EventWheel.hh"
+#include "GHOST_PathUtils.hh"
+#include "GHOST_TimerManager.hh"
+#include "GHOST_WaylandUtils.hh"
+#include "GHOST_WindowManager.hh"
+#include "GHOST_utildefines.hh"
 
-#include "GHOST_ContextEGL.h"
+#include "GHOST_ContextEGL.hh"
 
 #ifdef WITH_VULKAN_BACKEND
-#  include "GHOST_ContextVK.h"
+#  include "GHOST_ContextVK.hh"
 #endif
 
 #ifdef WITH_INPUT_NDOF
-#  include "GHOST_NDOFManagerUnix.h"
+#  include "GHOST_NDOFManagerUnix.hh"
 #endif
 
 #ifdef WITH_GHOST_WAYLAND_DYNLOAD
@@ -49,7 +49,7 @@
 #endif
 #include <wayland-cursor.h>
 
-#include "GHOST_WaylandCursorSettings.h"
+#include "GHOST_WaylandCursorSettings.hh"
 
 #include <xkbcommon/xkbcommon.h>
 
@@ -85,7 +85,7 @@
 #include "CLG_log.h"
 
 #ifdef USE_EVENT_BACKGROUND_THREAD
-#  include "GHOST_TimerTask.h"
+#  include "GHOST_TimerTask.hh"
 
 #  include <pthread.h>
 #endif
diff --git a/intern/ghost/intern/GHOST_SystemWayland.h b/intern/ghost/intern/GHOST_SystemWayland.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_SystemWayland.h
rename to intern/ghost/intern/GHOST_SystemWayland.hh
index 787d0d7b7bb..4b464e2d1e7 100644
--- a/intern/ghost/intern/GHOST_SystemWayland.h
+++ b/intern/ghost/intern/GHOST_SystemWayland.hh
@@ -8,8 +8,8 @@
 #pragma once
 
 #include "../GHOST_Types.h"
-#include "GHOST_System.h"
-#include "GHOST_WindowWayland.h"
+#include "GHOST_System.hh"
+#include "GHOST_WindowWayland.hh"
 
 #ifdef WITH_GHOST_WAYLAND_DYNLOAD
 #  include <wayland_dynload_client.h>
diff --git a/intern/ghost/intern/GHOST_SystemWin32.cpp b/intern/ghost/intern/GHOST_SystemWin32.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_SystemWin32.cpp
rename to intern/ghost/intern/GHOST_SystemWin32.cc
index f49bac243f1..51a8a5d464e 100644
--- a/intern/ghost/intern/GHOST_SystemWin32.cpp
+++ b/intern/ghost/intern/GHOST_SystemWin32.cc
@@ -5,10 +5,10 @@
  * \ingroup GHOST
  */
 
-#include "GHOST_SystemWin32.h"
-#include "GHOST_ContextD3D.h"
-#include "GHOST_EventDragnDrop.h"
-#include "GHOST_EventTrackpad.h"
+#include "GHOST_SystemWin32.hh"
+#include "GHOST_ContextD3D.hh"
+#include "GHOST_EventDragnDrop.hh"
+#include "GHOST_EventTrackpad.hh"
 
 #ifndef _WIN32_IE
 #  define _WIN32_IE 0x0501 /* shipped before XP, so doesn't impose additional requirements */
@@ -26,23 +26,23 @@
 #include "utf_winfunc.h"
 #include "utfconv.h"
 
-#include "GHOST_DisplayManagerWin32.h"
-#include "GHOST_EventButton.h"
-#include "GHOST_EventCursor.h"
-#include "GHOST_EventKey.h"
-#include "GHOST_EventWheel.h"
-#include "GHOST_TimerManager.h"
-#include "GHOST_TimerTask.h"
-#include "GHOST_WindowManager.h"
-#include "GHOST_WindowWin32.h"
+#include "GHOST_DisplayManagerWin32.hh"
+#include "GHOST_EventButton.hh"
+#include "GHOST_EventCursor.hh"
+#include "GHOST_EventKey.hh"
+#include "GHOST_EventWheel.hh"
+#include "GHOST_TimerManager.hh"
+#include "GHOST_TimerTask.hh"
+#include "GHOST_WindowManager.hh"
+#include "GHOST_WindowWin32.hh"
 
-#include "GHOST_ContextWGL.h"
+#include "GHOST_ContextWGL.hh"
 #ifdef WITH_VULKAN_BACKEND
-#  include "GHOST_ContextVK.h"
+#  include "GHOST_ContextVK.hh"
 #endif
 
 #ifdef WITH_INPUT_NDOF
-#  include "GHOST_NDOFManagerWin32.h"
+#  include "GHOST_NDOFManagerWin32.hh"
 #endif
 
 /* Key code values not found in `winuser.h`. */
diff --git a/intern/ghost/intern/GHOST_SystemWin32.h b/intern/ghost/intern/GHOST_SystemWin32.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_SystemWin32.h
rename to intern/ghost/intern/GHOST_SystemWin32.hh
index 29c35891062..f434be24448 100644
--- a/intern/ghost/intern/GHOST_SystemWin32.h
+++ b/intern/ghost/intern/GHOST_SystemWin32.hh
@@ -16,7 +16,7 @@
 #include <ole2.h> /* For drag-n-drop. */
 #include <windows.h>
 
-#include "GHOST_System.h"
+#include "GHOST_System.hh"
 
 class GHOST_EventButton;
 class GHOST_EventCursor;
diff --git a/intern/ghost/intern/GHOST_SystemX11.cpp b/intern/ghost/intern/GHOST_SystemX11.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_SystemX11.cpp
rename to intern/ghost/intern/GHOST_SystemX11.cc
index d3dab0401cc..19dfd717c04 100644
--- a/intern/ghost/intern/GHOST_SystemX11.cpp
+++ b/intern/ghost/intern/GHOST_SystemX11.cc
@@ -12,32 +12,32 @@
 #include <X11/Xutil.h>
 #include <X11/keysym.h>
 
-#include "GHOST_DisplayManagerX11.h"
-#include "GHOST_EventButton.h"
-#include "GHOST_EventCursor.h"
-#include "GHOST_EventDragnDrop.h"
-#include "GHOST_EventKey.h"
-#include "GHOST_EventWheel.h"
-#include "GHOST_SystemX11.h"
-#include "GHOST_TimerManager.h"
-#include "GHOST_WindowManager.h"
-#include "GHOST_WindowX11.h"
+#include "GHOST_DisplayManagerX11.hh"
+#include "GHOST_EventButton.hh"
+#include "GHOST_EventCursor.hh"
+#include "GHOST_EventDragnDrop.hh"
+#include "GHOST_EventKey.hh"
+#include "GHOST_EventWheel.hh"
+#include "GHOST_SystemX11.hh"
+#include "GHOST_TimerManager.hh"
+#include "GHOST_WindowManager.hh"
+#include "GHOST_WindowX11.hh"
 #ifdef WITH_INPUT_NDOF
-#  include "GHOST_NDOFManagerUnix.h"
+#  include "GHOST_NDOFManagerUnix.hh"
 #endif
-#include "GHOST_utildefines.h"
+#include "GHOST_utildefines.hh"
 
 #ifdef WITH_XDND
-#  include "GHOST_DropTargetX11.h"
+#  include "GHOST_DropTargetX11.hh"
 #endif
 
-#include "GHOST_Debug.h"
+#include "GHOST_Debug.hh"
 
-#include "GHOST_ContextEGL.h"
-#include "GHOST_ContextGLX.h"
+#include "GHOST_ContextEGL.hh"
+#include "GHOST_ContextGLX.hh"
 
 #ifdef WITH_VULKAN_BACKEND
-#  include "GHOST_ContextVK.h"
+#  include "GHOST_ContextVK.hh"
 #endif
 
 #ifdef WITH_XF86KEYSYM
@@ -326,7 +326,7 @@ GHOST_IWindow *GHOST_SystemX11::createWindow(const char *title,
                                (glSettings.flags & GHOST_glDebugContext) != 0);
 
   if (window) {
-    /* Both are now handle in GHOST_WindowX11.cpp
+    /* Both are now handle in GHOST_WindowX11.cc
      * Focus and Delete atoms. */
 
     if (window->getValid()) {
diff --git a/intern/ghost/intern/GHOST_SystemX11.h b/intern/ghost/intern/GHOST_SystemX11.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_SystemX11.h
rename to intern/ghost/intern/GHOST_SystemX11.hh
index a2e0f097d9f..4314063f2ba 100644
--- a/intern/ghost/intern/GHOST_SystemX11.h
+++ b/intern/ghost/intern/GHOST_SystemX11.hh
@@ -12,7 +12,7 @@
 #include <X11/Xlib.h>
 
 #include "../GHOST_Types.h"
-#include "GHOST_System.h"
+#include "GHOST_System.hh"
 
 /* For tablets. */
 #ifdef WITH_X11_XINPUT
diff --git a/intern/ghost/intern/GHOST_TaskbarWin32.h b/intern/ghost/intern/GHOST_TaskbarWin32.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_TaskbarWin32.h
rename to intern/ghost/intern/GHOST_TaskbarWin32.hh
diff --git a/intern/ghost/intern/GHOST_TaskbarX11.cpp b/intern/ghost/intern/GHOST_TaskbarX11.cc
similarity index 98%
rename from intern/ghost/intern/GHOST_TaskbarX11.cpp
rename to intern/ghost/intern/GHOST_TaskbarX11.cc
index 1e568c3a2b0..139f0aa688d 100644
--- a/intern/ghost/intern/GHOST_TaskbarX11.cpp
+++ b/intern/ghost/intern/GHOST_TaskbarX11.cc
@@ -4,7 +4,7 @@
  * \ingroup GHOST
  */
 
-#include "GHOST_TaskbarX11.h"
+#include "GHOST_TaskbarX11.hh"
 
 #include <cassert>
 #include <cstdio>
diff --git a/intern/ghost/intern/GHOST_TaskbarX11.h b/intern/ghost/intern/GHOST_TaskbarX11.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_TaskbarX11.h
rename to intern/ghost/intern/GHOST_TaskbarX11.hh
diff --git a/intern/ghost/intern/GHOST_TimerManager.cpp b/intern/ghost/intern/GHOST_TimerManager.cc
similarity index 97%
rename from intern/ghost/intern/GHOST_TimerManager.cpp
rename to intern/ghost/intern/GHOST_TimerManager.cc
index ca881c74acd..f0541dbf447 100644
--- a/intern/ghost/intern/GHOST_TimerManager.cpp
+++ b/intern/ghost/intern/GHOST_TimerManager.cc
@@ -9,11 +9,11 @@
  * Copyright (C) 2001 NaN Technologies B.V.
  */
 
-#include "GHOST_TimerManager.h"
+#include "GHOST_TimerManager.hh"
 
 #include <algorithm>
 
-#include "GHOST_TimerTask.h"
+#include "GHOST_TimerTask.hh"
 
 GHOST_TimerManager::GHOST_TimerManager() {}
 
diff --git a/intern/ghost/intern/GHOST_TimerManager.h b/intern/ghost/intern/GHOST_TimerManager.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_TimerManager.h
rename to intern/ghost/intern/GHOST_TimerManager.hh
diff --git a/intern/ghost/intern/GHOST_TimerTask.h b/intern/ghost/intern/GHOST_TimerTask.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_TimerTask.h
rename to intern/ghost/intern/GHOST_TimerTask.hh
index 8ca8e36837e..6b39b788d9b 100644
--- a/intern/ghost/intern/GHOST_TimerTask.h
+++ b/intern/ghost/intern/GHOST_TimerTask.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "GHOST_ITimerTask.h"
+#include "GHOST_ITimerTask.hh"
 
 /**
  * Implementation of a timer task.
diff --git a/intern/ghost/intern/GHOST_TrackpadWin32.cpp b/intern/ghost/intern/GHOST_TrackpadWin32.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_TrackpadWin32.cpp
rename to intern/ghost/intern/GHOST_TrackpadWin32.cc
index 4d5ce6fabe1..d19b0469123 100644
--- a/intern/ghost/intern/GHOST_TrackpadWin32.cpp
+++ b/intern/ghost/intern/GHOST_TrackpadWin32.cc
@@ -6,8 +6,8 @@
 
 #include <cmath>
 
-#include "GHOST_Debug.h"
-#include "GHOST_TrackpadWin32.h"
+#include "GHOST_Debug.hh"
+#include "GHOST_TrackpadWin32.hh"
 
 GHOST_DirectManipulationHelper::GHOST_DirectManipulationHelper(
     HWND hWnd,
diff --git a/intern/ghost/intern/GHOST_TrackpadWin32.h b/intern/ghost/intern/GHOST_TrackpadWin32.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_TrackpadWin32.h
rename to intern/ghost/intern/GHOST_TrackpadWin32.hh
diff --git a/intern/ghost/intern/GHOST_Util.h b/intern/ghost/intern/GHOST_Util.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_Util.h
rename to intern/ghost/intern/GHOST_Util.hh
diff --git a/intern/ghost/intern/GHOST_WaylandCursorSettings.h b/intern/ghost/intern/GHOST_WaylandCursorSettings.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_WaylandCursorSettings.h
rename to intern/ghost/intern/GHOST_WaylandCursorSettings.hh
diff --git a/intern/ghost/intern/GHOST_WaylandUtils.h b/intern/ghost/intern/GHOST_WaylandUtils.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_WaylandUtils.h
rename to intern/ghost/intern/GHOST_WaylandUtils.hh
diff --git a/intern/ghost/intern/GHOST_Window.cpp b/intern/ghost/intern/GHOST_Window.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_Window.cpp
rename to intern/ghost/intern/GHOST_Window.cc
index aeff3e8df0a..12d83180fb0 100644
--- a/intern/ghost/intern/GHOST_Window.cpp
+++ b/intern/ghost/intern/GHOST_Window.cc
@@ -9,9 +9,9 @@
  * Copyright (C) 2001 NaN Technologies B.V.
  */
 
-#include "GHOST_Window.h"
+#include "GHOST_Window.hh"
 
-#include "GHOST_ContextNone.h"
+#include "GHOST_ContextNone.hh"
 
 #include <cassert>
 
diff --git a/intern/ghost/intern/GHOST_Window.h b/intern/ghost/intern/GHOST_Window.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_Window.h
rename to intern/ghost/intern/GHOST_Window.hh
index 85d7babfb56..d9d65832dfe 100644
--- a/intern/ghost/intern/GHOST_Window.h
+++ b/intern/ghost/intern/GHOST_Window.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "GHOST_IWindow.h"
+#include "GHOST_IWindow.hh"
 
 class GHOST_Context;
 
diff --git a/intern/ghost/intern/GHOST_WindowCocoa.h b/intern/ghost/intern/GHOST_WindowCocoa.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_WindowCocoa.h
rename to intern/ghost/intern/GHOST_WindowCocoa.hh
index 35daa9ec2a3..36bdd314e47 100644
--- a/intern/ghost/intern/GHOST_WindowCocoa.h
+++ b/intern/ghost/intern/GHOST_WindowCocoa.hh
@@ -12,9 +12,9 @@
 #  error Apple OSX only!
 #endif  // __APPLE__
 
-#include "GHOST_Window.h"
+#include "GHOST_Window.hh"
 #ifdef WITH_INPUT_IME
-#  include "GHOST_Event.h"
+#  include "GHOST_Event.hh"
 #endif
 
 @class CAMetalLayer;
diff --git a/intern/ghost/intern/GHOST_WindowCocoa.mm b/intern/ghost/intern/GHOST_WindowCocoa.mm
index dd25ce56cf8..58b82673735 100644
--- a/intern/ghost/intern/GHOST_WindowCocoa.mm
+++ b/intern/ghost/intern/GHOST_WindowCocoa.mm
@@ -1,10 +1,10 @@
 /* SPDX-License-Identifier: GPL-2.0-or-later
  * Copyright 2001-2002 NaN Holding BV. All rights reserved. */
 
-#include "GHOST_WindowCocoa.h"
-#include "GHOST_ContextNone.h"
-#include "GHOST_Debug.h"
-#include "GHOST_SystemCocoa.h"
+#include "GHOST_WindowCocoa.hh"
+#include "GHOST_ContextNone.hh"
+#include "GHOST_Debug.hh"
+#include "GHOST_SystemCocoa.hh"
 
 /* Don't generate OpenGL deprecation warning. This is a known thing, and is not something easily
  * solvable in a short term. */
@@ -12,10 +12,10 @@
 #  pragma clang diagnostic ignored "-Wdeprecated-declarations"
 #endif
 
-#include "GHOST_ContextCGL.h"
+#include "GHOST_ContextCGL.hh"
 
 #ifdef WITH_VULKAN_BACKEND
-#  include "GHOST_ContextVK.h"
+#  include "GHOST_ContextVK.hh"
 #endif
 
 #include <Cocoa/Cocoa.h>
@@ -264,13 +264,13 @@
 /* NSView for handling input and drawing. */
 #define COCOA_VIEW_CLASS CocoaOpenGLView
 #define COCOA_VIEW_BASE_CLASS NSOpenGLView
-#include "GHOST_WindowViewCocoa.h"
+#include "GHOST_WindowViewCocoa.hh"
 #undef COCOA_VIEW_CLASS
 #undef COCOA_VIEW_BASE_CLASS
 
 #define COCOA_VIEW_CLASS CocoaMetalView
 #define COCOA_VIEW_BASE_CLASS NSView
-#include "GHOST_WindowViewCocoa.h"
+#include "GHOST_WindowViewCocoa.hh"
 #undef COCOA_VIEW_CLASS
 #undef COCOA_VIEW_BASE_CLASS
 
diff --git a/intern/ghost/intern/GHOST_WindowManager.cpp b/intern/ghost/intern/GHOST_WindowManager.cc
similarity index 97%
rename from intern/ghost/intern/GHOST_WindowManager.cpp
rename to intern/ghost/intern/GHOST_WindowManager.cc
index e8785cbdb24..33a45a09669 100644
--- a/intern/ghost/intern/GHOST_WindowManager.cpp
+++ b/intern/ghost/intern/GHOST_WindowManager.cc
@@ -9,9 +9,9 @@
  * Copyright (C) 2001 NaN Technologies B.V.
  */
 
-#include "GHOST_WindowManager.h"
-#include "GHOST_Debug.h"
-#include "GHOST_Window.h"
+#include "GHOST_WindowManager.hh"
+#include "GHOST_Debug.hh"
+#include "GHOST_Window.hh"
 #include <algorithm>
 
 GHOST_WindowManager::GHOST_WindowManager()
diff --git a/intern/ghost/intern/GHOST_WindowManager.h b/intern/ghost/intern/GHOST_WindowManager.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_WindowManager.h
rename to intern/ghost/intern/GHOST_WindowManager.hh
index 79645bc68ed..ece949d622d 100644
--- a/intern/ghost/intern/GHOST_WindowManager.h
+++ b/intern/ghost/intern/GHOST_WindowManager.hh
@@ -10,8 +10,8 @@
 
 #include <vector>
 
-#include "GHOST_IWindow.h"
-#include "GHOST_Rect.h"
+#include "GHOST_IWindow.hh"
+#include "GHOST_Rect.hh"
 
 /**
  * Manages system windows (platform independent implementation).
diff --git a/intern/ghost/intern/GHOST_WindowNULL.h b/intern/ghost/intern/GHOST_WindowNULL.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_WindowNULL.h
rename to intern/ghost/intern/GHOST_WindowNULL.hh
index f9c0a593d5f..3749206d2ed 100644
--- a/intern/ghost/intern/GHOST_WindowNULL.h
+++ b/intern/ghost/intern/GHOST_WindowNULL.hh
@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include "GHOST_Window.h"
+#include "GHOST_Window.hh"
 
 #include <map>
 
diff --git a/intern/ghost/intern/GHOST_WindowSDL.cpp b/intern/ghost/intern/GHOST_WindowSDL.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_WindowSDL.cpp
rename to intern/ghost/intern/GHOST_WindowSDL.cc
index f0d5f5d93ab..5783c8005dc 100644
--- a/intern/ghost/intern/GHOST_WindowSDL.cpp
+++ b/intern/ghost/intern/GHOST_WindowSDL.cc
@@ -4,10 +4,10 @@
  * \ingroup GHOST
  */
 
-#include "GHOST_WindowSDL.h"
+#include "GHOST_WindowSDL.hh"
 #include "SDL_mouse.h"
 
-#include "GHOST_ContextSDL.h"
+#include "GHOST_ContextSDL.hh"
 
 #include <cassert>
 
diff --git a/intern/ghost/intern/GHOST_WindowSDL.h b/intern/ghost/intern/GHOST_WindowSDL.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_WindowSDL.h
rename to intern/ghost/intern/GHOST_WindowSDL.hh
index 49ff3ace6c3..807fb7ec72a 100644
--- a/intern/ghost/intern/GHOST_WindowSDL.h
+++ b/intern/ghost/intern/GHOST_WindowSDL.hh
@@ -7,8 +7,8 @@
 
 #pragma once
 
-#include "GHOST_SystemSDL.h"
-#include "GHOST_Window.h"
+#include "GHOST_SystemSDL.hh"
+#include "GHOST_Window.hh"
 
 #include <map>
 
diff --git a/intern/ghost/intern/GHOST_WindowViewCocoa.h b/intern/ghost/intern/GHOST_WindowViewCocoa.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_WindowViewCocoa.h
rename to intern/ghost/intern/GHOST_WindowViewCocoa.hh
diff --git a/intern/ghost/intern/GHOST_WindowWayland.cpp b/intern/ghost/intern/GHOST_WindowWayland.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_WindowWayland.cpp
rename to intern/ghost/intern/GHOST_WindowWayland.cc
index 3108ff01799..b51cfc68635 100644
--- a/intern/ghost/intern/GHOST_WindowWayland.cpp
+++ b/intern/ghost/intern/GHOST_WindowWayland.cc
@@ -4,18 +4,18 @@
  * \ingroup GHOST
  */
 
-#include "GHOST_WindowWayland.h"
-#include "GHOST_SystemWayland.h"
-#include "GHOST_WaylandUtils.h"
-#include "GHOST_WindowManager.h"
-#include "GHOST_utildefines.h"
+#include "GHOST_WindowWayland.hh"
+#include "GHOST_SystemWayland.hh"
+#include "GHOST_WaylandUtils.hh"
+#include "GHOST_WindowManager.hh"
+#include "GHOST_utildefines.hh"
 
-#include "GHOST_Event.h"
+#include "GHOST_Event.hh"
 
-#include "GHOST_ContextEGL.h"
-#include "GHOST_ContextNone.h"
+#include "GHOST_ContextEGL.hh"
+#include "GHOST_ContextNone.hh"
 #ifdef WITH_VULKAN_BACKEND
-#  include "GHOST_ContextVK.h"
+#  include "GHOST_ContextVK.hh"
 #endif
 
 #include <wayland-client-protocol.h>
diff --git a/intern/ghost/intern/GHOST_WindowWayland.h b/intern/ghost/intern/GHOST_WindowWayland.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_WindowWayland.h
rename to intern/ghost/intern/GHOST_WindowWayland.hh
index e04be48a5e9..150905f4649 100644
--- a/intern/ghost/intern/GHOST_WindowWayland.h
+++ b/intern/ghost/intern/GHOST_WindowWayland.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "GHOST_Window.h"
+#include "GHOST_Window.hh"
 
 #include <vector>
 
diff --git a/intern/ghost/intern/GHOST_WindowWin32.cpp b/intern/ghost/intern/GHOST_WindowWin32.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_WindowWin32.cpp
rename to intern/ghost/intern/GHOST_WindowWin32.cc
index 06d9ea939e0..b8b8e14f400 100644
--- a/intern/ghost/intern/GHOST_WindowWin32.cpp
+++ b/intern/ghost/intern/GHOST_WindowWin32.cc
@@ -5,18 +5,18 @@
  * \ingroup GHOST
  */
 
-#include "GHOST_WindowWin32.h"
-#include "GHOST_ContextD3D.h"
-#include "GHOST_ContextNone.h"
-#include "GHOST_DropTargetWin32.h"
-#include "GHOST_SystemWin32.h"
-#include "GHOST_WindowManager.h"
+#include "GHOST_WindowWin32.hh"
+#include "GHOST_ContextD3D.hh"
+#include "GHOST_ContextNone.hh"
+#include "GHOST_DropTargetWin32.hh"
+#include "GHOST_SystemWin32.hh"
+#include "GHOST_WindowManager.hh"
 #include "utf_winfunc.h"
 #include "utfconv.h"
 
-#include "GHOST_ContextWGL.h"
+#include "GHOST_ContextWGL.hh"
 #ifdef WITH_VULKAN_BACKEND
-#  include "GHOST_ContextVK.h"
+#  include "GHOST_ContextVK.hh"
 #endif
 
 #include <Dwmapi.h>
diff --git a/intern/ghost/intern/GHOST_WindowWin32.h b/intern/ghost/intern/GHOST_WindowWin32.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_WindowWin32.h
rename to intern/ghost/intern/GHOST_WindowWin32.hh
index 44071f0915e..cb6a11691d5 100644
--- a/intern/ghost/intern/GHOST_WindowWin32.h
+++ b/intern/ghost/intern/GHOST_WindowWin32.hh
@@ -12,12 +12,12 @@
 #  error WIN32 only!
 #endif /* WIN32 */
 
-#include "GHOST_TaskbarWin32.h"
-#include "GHOST_TrackpadWin32.h"
-#include "GHOST_Window.h"
-#include "GHOST_Wintab.h"
+#include "GHOST_TaskbarWin32.hh"
+#include "GHOST_TrackpadWin32.hh"
+#include "GHOST_Window.hh"
+#include "GHOST_Wintab.hh"
 #ifdef WITH_INPUT_IME
-#  include "GHOST_ImeWin32.h"
+#  include "GHOST_ImeWin32.hh"
 #endif
 
 #include <vector>
diff --git a/intern/ghost/intern/GHOST_WindowX11.cpp b/intern/ghost/intern/GHOST_WindowX11.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_WindowX11.cpp
rename to intern/ghost/intern/GHOST_WindowX11.cc
index 3e93fdc0b08..ae91a0c3580 100644
--- a/intern/ghost/intern/GHOST_WindowX11.cpp
+++ b/intern/ghost/intern/GHOST_WindowX11.cc
@@ -11,21 +11,21 @@
 #include <X11/Xutil.h>
 #include <X11/cursorfont.h>
 
-#include "GHOST_Debug.h"
-#include "GHOST_IconX11.h"
-#include "GHOST_SystemX11.h"
+#include "GHOST_Debug.hh"
+#include "GHOST_IconX11.hh"
+#include "GHOST_SystemX11.hh"
 #include "GHOST_Types.h"
-#include "GHOST_WindowX11.h"
-#include "GHOST_utildefines.h"
+#include "GHOST_WindowX11.hh"
+#include "GHOST_utildefines.hh"
 
 #ifdef WITH_XDND
-#  include "GHOST_DropTargetX11.h"
+#  include "GHOST_DropTargetX11.hh"
 #endif
 
-#include "GHOST_ContextEGL.h"
-#include "GHOST_ContextGLX.h"
+#include "GHOST_ContextEGL.hh"
+#include "GHOST_ContextGLX.hh"
 #ifdef WITH_VULKAN_BACKEND
-#  include "GHOST_ContextVK.h"
+#  include "GHOST_ContextVK.hh"
 #endif
 
 /* For #XIWarpPointer. */
diff --git a/intern/ghost/intern/GHOST_WindowX11.h b/intern/ghost/intern/GHOST_WindowX11.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_WindowX11.h
rename to intern/ghost/intern/GHOST_WindowX11.hh
index f9dac3b2ac7..36cd2cbe26c 100644
--- a/intern/ghost/intern/GHOST_WindowX11.h
+++ b/intern/ghost/intern/GHOST_WindowX11.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "GHOST_Window.h"
+#include "GHOST_Window.hh"
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
 /* For tablets. */
@@ -16,7 +16,7 @@
 #  include <X11/extensions/XInput.h>
 #endif
 
-#include "GHOST_TaskbarX11.h"
+#include "GHOST_TaskbarX11.hh"
 
 #include <map>
 
@@ -147,7 +147,7 @@ class GHOST_WindowX11 : public GHOST_Window {
   /*
    * Need this in case that we want start the window
    * in FullScree or Maximized state.
-   * Check GHOST_WindowX11.cpp
+   * Check GHOST_WindowX11.cc
    */
   bool m_post_init;
   GHOST_TWindowState m_post_state;
diff --git a/intern/ghost/intern/GHOST_Wintab.cpp b/intern/ghost/intern/GHOST_Wintab.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_Wintab.cpp
rename to intern/ghost/intern/GHOST_Wintab.cc
index f7075efcbdd..784b71d21ef 100644
--- a/intern/ghost/intern/GHOST_Wintab.cpp
+++ b/intern/ghost/intern/GHOST_Wintab.cc
@@ -6,7 +6,7 @@
 
 #define _USE_MATH_DEFINES
 
-#include "GHOST_Wintab.h"
+#include "GHOST_Wintab.hh"
 
 GHOST_Wintab *GHOST_Wintab::loadWintab(HWND hwnd)
 {
diff --git a/intern/ghost/intern/GHOST_Wintab.h b/intern/ghost/intern/GHOST_Wintab.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_Wintab.h
rename to intern/ghost/intern/GHOST_Wintab.hh
diff --git a/intern/ghost/intern/GHOST_Xr.cpp b/intern/ghost/intern/GHOST_Xr.cc
similarity index 91%
rename from intern/ghost/intern/GHOST_Xr.cpp
rename to intern/ghost/intern/GHOST_Xr.cc
index f32200102cd..72e1d5a0045 100644
--- a/intern/ghost/intern/GHOST_Xr.cpp
+++ b/intern/ghost/intern/GHOST_Xr.cc
@@ -11,9 +11,9 @@
 
 #include "GHOST_C-api.h"
 
-#include "GHOST_XrContext.h"
-#include "GHOST_XrException.h"
-#include "GHOST_Xr_intern.h"
+#include "GHOST_XrContext.hh"
+#include "GHOST_XrException.hh"
+#include "GHOST_Xr_intern.hh"
 
 GHOST_XrContextHandle GHOST_XrContextCreate(const GHOST_XrContextCreateInfo *create_info)
 {
diff --git a/intern/ghost/intern/GHOST_XrAction.cpp b/intern/ghost/intern/GHOST_XrAction.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_XrAction.cpp
rename to intern/ghost/intern/GHOST_XrAction.cc
index 9fbe033ade9..79ec9dfcb15 100644
--- a/intern/ghost/intern/GHOST_XrAction.cpp
+++ b/intern/ghost/intern/GHOST_XrAction.cc
@@ -9,10 +9,10 @@
 
 #include "GHOST_Types.h"
 
-#include "GHOST_XrException.h"
-#include "GHOST_Xr_intern.h"
+#include "GHOST_XrException.hh"
+#include "GHOST_Xr_intern.hh"
 
-#include "GHOST_XrAction.h"
+#include "GHOST_XrAction.hh"
 
 /* -------------------------------------------------------------------- */
 /** \name GHOST_XrActionSpace
diff --git a/intern/ghost/intern/GHOST_XrAction.h b/intern/ghost/intern/GHOST_XrAction.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_XrAction.h
rename to intern/ghost/intern/GHOST_XrAction.hh
index 956ff342dc4..0b1e9760026 100644
--- a/intern/ghost/intern/GHOST_XrAction.h
+++ b/intern/ghost/intern/GHOST_XrAction.hh
@@ -13,7 +13,7 @@
 #include <memory>
 #include <string>
 
-#include "GHOST_Util.h"
+#include "GHOST_Util.hh"
 
 /* -------------------------------------------------------------------- */
 
diff --git a/intern/ghost/intern/GHOST_XrContext.cpp b/intern/ghost/intern/GHOST_XrContext.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_XrContext.cpp
rename to intern/ghost/intern/GHOST_XrContext.cc
index 413e2670750..66ebb3c01c6 100644
--- a/intern/ghost/intern/GHOST_XrContext.cpp
+++ b/intern/ghost/intern/GHOST_XrContext.cc
@@ -13,11 +13,11 @@
 #include <string_view>
 
 #include "GHOST_Types.h"
-#include "GHOST_XrException.h"
-#include "GHOST_XrSession.h"
-#include "GHOST_Xr_intern.h"
+#include "GHOST_XrException.hh"
+#include "GHOST_XrSession.hh"
+#include "GHOST_Xr_intern.hh"
 
-#include "GHOST_XrContext.h"
+#include "GHOST_XrContext.hh"
 
 struct OpenXRInstanceData {
   XrInstance instance = XR_NULL_HANDLE;
diff --git a/intern/ghost/intern/GHOST_XrContext.h b/intern/ghost/intern/GHOST_XrContext.hh
similarity index 98%
rename from intern/ghost/intern/GHOST_XrContext.h
rename to intern/ghost/intern/GHOST_XrContext.hh
index 6eac4284e43..98f0991d3ff 100644
--- a/intern/ghost/intern/GHOST_XrContext.h
+++ b/intern/ghost/intern/GHOST_XrContext.hh
@@ -9,9 +9,9 @@
 #include <memory>
 #include <vector>
 
-#include "GHOST_Xr_intern.h"
+#include "GHOST_Xr_intern.hh"
 
-#include "GHOST_IXrContext.h"
+#include "GHOST_IXrContext.hh"
 
 struct OpenXRInstanceData;
 
diff --git a/intern/ghost/intern/GHOST_XrControllerModel.cpp b/intern/ghost/intern/GHOST_XrControllerModel.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_XrControllerModel.cpp
rename to intern/ghost/intern/GHOST_XrControllerModel.cc
index 0a8b0dcb003..55b76f51237 100644
--- a/intern/ghost/intern/GHOST_XrControllerModel.cpp
+++ b/intern/ghost/intern/GHOST_XrControllerModel.cc
@@ -10,10 +10,10 @@
 #include <Eigen/Geometry>
 
 #include "GHOST_Types.h"
-#include "GHOST_XrException.h"
-#include "GHOST_Xr_intern.h"
+#include "GHOST_XrException.hh"
+#include "GHOST_Xr_intern.hh"
 
-#include "GHOST_XrControllerModel.h"
+#include "GHOST_XrControllerModel.hh"
 
 #define TINYGLTF_IMPLEMENTATION
 #define TINYGLTF_NO_STB_IMAGE
diff --git a/intern/ghost/intern/GHOST_XrControllerModel.h b/intern/ghost/intern/GHOST_XrControllerModel.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_XrControllerModel.h
rename to intern/ghost/intern/GHOST_XrControllerModel.hh
diff --git a/intern/ghost/intern/GHOST_XrEvent.cpp b/intern/ghost/intern/GHOST_XrEvent.cc
similarity index 95%
rename from intern/ghost/intern/GHOST_XrEvent.cpp
rename to intern/ghost/intern/GHOST_XrEvent.cc
index 8a251439128..8097422275a 100644
--- a/intern/ghost/intern/GHOST_XrEvent.cpp
+++ b/intern/ghost/intern/GHOST_XrEvent.cc
@@ -7,8 +7,8 @@
 #include <iostream>
 
 #include "GHOST_C-api.h"
-#include "GHOST_XrContext.h"
-#include "GHOST_Xr_intern.h"
+#include "GHOST_XrContext.hh"
+#include "GHOST_Xr_intern.hh"
 
 static bool GHOST_XrEventPollNext(XrInstance instance, XrEventDataBuffer &r_event_data)
 {
diff --git a/intern/ghost/intern/GHOST_XrException.h b/intern/ghost/intern/GHOST_XrException.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_XrException.h
rename to intern/ghost/intern/GHOST_XrException.hh
diff --git a/intern/ghost/intern/GHOST_XrGraphicsBinding.cpp b/intern/ghost/intern/GHOST_XrGraphicsBinding.cc
similarity index 98%
rename from intern/ghost/intern/GHOST_XrGraphicsBinding.cpp
rename to intern/ghost/intern/GHOST_XrGraphicsBinding.cc
index d387b222538..70099ac4dcc 100644
--- a/intern/ghost/intern/GHOST_XrGraphicsBinding.cpp
+++ b/intern/ghost/intern/GHOST_XrGraphicsBinding.cc
@@ -9,24 +9,24 @@
 #include <sstream>
 
 #if defined(WITH_GHOST_X11)
-#  include "GHOST_ContextEGL.h"
-#  include "GHOST_ContextGLX.h"
-#  include "GHOST_SystemX11.h"
+#  include "GHOST_ContextEGL.hh"
+#  include "GHOST_ContextGLX.hh"
+#  include "GHOST_SystemX11.hh"
 #endif
 #if defined(WITH_GHOST_WAYLAND)
-#  include "GHOST_ContextEGL.h"
-#  include "GHOST_SystemWayland.h"
+#  include "GHOST_ContextEGL.hh"
+#  include "GHOST_SystemWayland.hh"
 #endif
 #if defined(WIN32)
-#  include "GHOST_ContextD3D.h"
-#  include "GHOST_ContextWGL.h"
-#  include "GHOST_SystemWin32.h"
+#  include "GHOST_ContextD3D.hh"
+#  include "GHOST_ContextWGL.hh"
+#  include "GHOST_SystemWin32.hh"
 #endif
 #include "GHOST_C-api.h"
-#include "GHOST_XrException.h"
-#include "GHOST_Xr_intern.h"
+#include "GHOST_XrException.hh"
+#include "GHOST_Xr_intern.hh"
 
-#include "GHOST_IXrGraphicsBinding.h"
+#include "GHOST_IXrGraphicsBinding.hh"
 
 static std::optional<int64_t> choose_swapchain_format_from_candidates(
     const std::vector<int64_t> &gpu_binding_formats, const std::vector<int64_t> &runtime_formats)
diff --git a/intern/ghost/intern/GHOST_XrSession.cpp b/intern/ghost/intern/GHOST_XrSession.cc
similarity index 99%
rename from intern/ghost/intern/GHOST_XrSession.cpp
rename to intern/ghost/intern/GHOST_XrSession.cc
index e8f9b96b15c..6a874a7f2c0 100644
--- a/intern/ghost/intern/GHOST_XrSession.cpp
+++ b/intern/ghost/intern/GHOST_XrSession.cc
@@ -13,15 +13,15 @@
 
 #include "GHOST_C-api.h"
 
-#include "GHOST_IXrGraphicsBinding.h"
-#include "GHOST_XrAction.h"
-#include "GHOST_XrContext.h"
-#include "GHOST_XrControllerModel.h"
-#include "GHOST_XrException.h"
-#include "GHOST_XrSwapchain.h"
-#include "GHOST_Xr_intern.h"
+#include "GHOST_IXrGraphicsBinding.hh"
+#include "GHOST_XrAction.hh"
+#include "GHOST_XrContext.hh"
+#include "GHOST_XrControllerModel.hh"
+#include "GHOST_XrException.hh"
+#include "GHOST_XrSwapchain.hh"
+#include "GHOST_Xr_intern.hh"
 
-#include "GHOST_XrSession.h"
+#include "GHOST_XrSession.hh"
 
 struct OpenXRSessionData {
   XrSystemId system_id = XR_NULL_SYSTEM_ID;
diff --git a/intern/ghost/intern/GHOST_XrSession.h b/intern/ghost/intern/GHOST_XrSession.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_XrSession.h
rename to intern/ghost/intern/GHOST_XrSession.hh
index 5e0cdbbc1fc..e7f7fa6db6f 100644
--- a/intern/ghost/intern/GHOST_XrSession.h
+++ b/intern/ghost/intern/GHOST_XrSession.hh
@@ -9,7 +9,7 @@
 #include <map>
 #include <memory>
 
-#include "GHOST_Xr_intern.h"
+#include "GHOST_Xr_intern.hh"
 
 class GHOST_XrContext;
 class GHOST_XrSwapchain;
diff --git a/intern/ghost/intern/GHOST_XrSwapchain.cpp b/intern/ghost/intern/GHOST_XrSwapchain.cc
similarity index 96%
rename from intern/ghost/intern/GHOST_XrSwapchain.cpp
rename to intern/ghost/intern/GHOST_XrSwapchain.cc
index 8f4514954f0..9a7116e9c1d 100644
--- a/intern/ghost/intern/GHOST_XrSwapchain.cpp
+++ b/intern/ghost/intern/GHOST_XrSwapchain.cc
@@ -8,12 +8,12 @@
 
 #include "GHOST_C-api.h"
 
-#include "GHOST_IXrGraphicsBinding.h"
-#include "GHOST_XrException.h"
-#include "GHOST_XrSession.h"
-#include "GHOST_Xr_intern.h"
+#include "GHOST_IXrGraphicsBinding.hh"
+#include "GHOST_XrException.hh"
+#include "GHOST_XrSession.hh"
+#include "GHOST_Xr_intern.hh"
 
-#include "GHOST_XrSwapchain.h"
+#include "GHOST_XrSwapchain.hh"
 
 struct OpenXRSwapchainData {
   using ImageVec = std::vector<XrSwapchainImageBaseHeader *>;
diff --git a/intern/ghost/intern/GHOST_XrSwapchain.h b/intern/ghost/intern/GHOST_XrSwapchain.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_XrSwapchain.h
rename to intern/ghost/intern/GHOST_XrSwapchain.hh
diff --git a/intern/ghost/intern/GHOST_Xr_intern.h b/intern/ghost/intern/GHOST_Xr_intern.hh
similarity index 97%
rename from intern/ghost/intern/GHOST_Xr_intern.h
rename to intern/ghost/intern/GHOST_Xr_intern.hh
index 8c542762b91..bc12604842e 100644
--- a/intern/ghost/intern/GHOST_Xr_intern.h
+++ b/intern/ghost/intern/GHOST_Xr_intern.hh
@@ -9,7 +9,7 @@
 #include <memory>
 #include <vector>
 
-#include "GHOST_Xr_openxr_includes.h"
+#include "GHOST_Xr_openxr_includes.hh"
 
 #define CHECK_XR(call, error_msg) \
   { \
diff --git a/intern/ghost/intern/GHOST_Xr_openxr_includes.h b/intern/ghost/intern/GHOST_Xr_openxr_includes.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_Xr_openxr_includes.h
rename to intern/ghost/intern/GHOST_Xr_openxr_includes.hh
diff --git a/intern/ghost/intern/GHOST_utildefines.h b/intern/ghost/intern/GHOST_utildefines.hh
similarity index 99%
rename from intern/ghost/intern/GHOST_utildefines.h
rename to intern/ghost/intern/GHOST_utildefines.hh
index ff092099c7c..4cb834514d5 100644
--- a/intern/ghost/intern/GHOST_utildefines.h
+++ b/intern/ghost/intern/GHOST_utildefines.hh
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#include "GHOST_utildefines_variadic.h"
+#include "GHOST_utildefines_variadic.hh"
 
 /* -------------------------------------------------------------------- */
 /** \name Branch Prediction Macros
diff --git a/intern/ghost/intern/GHOST_utildefines_variadic.h b/intern/ghost/intern/GHOST_utildefines_variadic.hh
similarity index 100%
rename from intern/ghost/intern/GHOST_utildefines_variadic.h
rename to intern/ghost/intern/GHOST_utildefines_variadic.hh
diff --git a/intern/ghost/test/gears/GHOST_Test.cpp b/intern/ghost/test/gears/GHOST_Test.cpp
index 818cbc38e95..935f233cc96 100644
--- a/intern/ghost/test/gears/GHOST_Test.cpp
+++ b/intern/ghost/test/gears/GHOST_Test.cpp
@@ -27,11 +27,11 @@
 #  include <GL/gl.h>
 #endif  // defined(WIN32) || defined(__APPLE__)
 
-#include "GHOST_Rect.h"
+#include "GHOST_Rect.hh"
 
-#include "GHOST_IEvent.h"
-#include "GHOST_IEventConsumer.h"
-#include "GHOST_ISystem.h"
+#include "GHOST_IEvent.hh"
+#include "GHOST_IEventConsumer.hh"
+#include "GHOST_ISystem.hh"
 
 #define LEFT_EYE 0
 #define RIGHT_EYE 1
diff --git a/source/blender/blenkernel/intern/appdir.c b/source/blender/blenkernel/intern/appdir.c
index 369404724ba..87ba54af1d7 100644
--- a/source/blender/blenkernel/intern/appdir.c
+++ b/source/blender/blenkernel/intern/appdir.c
@@ -25,7 +25,7 @@
 
 #include "BLT_translation.h"
 
-#include "GHOST_Path-api.h"
+#include "GHOST_Path-api.hh"
 
 #include "MEM_guardedalloc.h"
 
diff --git a/source/blender/blenkernel/intern/layer_test.cc b/source/blender/blenkernel/intern/layer_test.cc
index c332c67342b..9dccef76649 100644
--- a/source/blender/blenkernel/intern/layer_test.cc
+++ b/source/blender/blenkernel/intern/layer_test.cc
@@ -19,7 +19,7 @@
 #include "RNA_access.h"
 #include "RNA_prototypes.h"
 
-#include "GHOST_Path-api.h"
+#include "GHOST_Path-api.hh"
 
 namespace blender::bke::tests {
 
diff --git a/source/blender/blenloader/tests/blendfile_loading_base_test.cc b/source/blender/blenloader/tests/blendfile_loading_base_test.cc
index 6613c65c42a..4778cf5db39 100644
--- a/source/blender/blenloader/tests/blendfile_loading_base_test.cc
+++ b/source/blender/blenloader/tests/blendfile_loading_base_test.cc
@@ -39,7 +39,7 @@
 #include "WM_api.h"
 #include "wm.h"
 
-#include "GHOST_Path-api.h"
+#include "GHOST_Path-api.hh"
 
 #include "CLG_log.h"
 
diff --git a/source/blender/gpu/metal/mtl_command_buffer.mm b/source/blender/gpu/metal/mtl_command_buffer.mm
index fa57429b5d8..a10e46cdf77 100644
--- a/source/blender/gpu/metal/mtl_command_buffer.mm
+++ b/source/blender/gpu/metal/mtl_command_buffer.mm
@@ -8,7 +8,7 @@
 #include "mtl_debug.hh"
 #include "mtl_framebuffer.hh"
 
-#include "intern/GHOST_ContextCGL.h"
+#include "intern/GHOST_ContextCGL.hh"
 
 #include <fstream>
 
diff --git a/source/blender/gpu/metal/mtl_context.hh b/source/blender/gpu/metal/mtl_context.hh
index 62ea96d731c..5a782019ccb 100644
--- a/source/blender/gpu/metal/mtl_context.hh
+++ b/source/blender/gpu/metal/mtl_context.hh
@@ -18,9 +18,9 @@
 #  pragma clang diagnostic ignored "-Wdeprecated-declarations"
 #endif
 
-#include "intern/GHOST_Context.h"
-#include "intern/GHOST_ContextCGL.h"
-#include "intern/GHOST_Window.h"
+#include "intern/GHOST_Context.hh"
+#include "intern/GHOST_ContextCGL.hh"
+#include "intern/GHOST_Window.hh"
 
 #include "mtl_backend.hh"
 #include "mtl_capabilities.hh"
diff --git a/source/blender/windowmanager/intern/wm_files.cc b/source/blender/windowmanager/intern/wm_files.cc
index 0ba47e2cf4d..4fb53264dda 100644
--- a/source/blender/windowmanager/intern/wm_files.cc
+++ b/source/blender/windowmanager/intern/wm_files.cc
@@ -103,7 +103,7 @@
 #include "ED_view3d_offscreen.h"
 
 #include "GHOST_C-api.h"
-#include "GHOST_Path-api.h"
+#include "GHOST_Path-api.hh"
 
 #include "GPU_context.h"
 
diff --git a/source/blender/windowmanager/intern/wm_init_exit.cc b/source/blender/windowmanager/intern/wm_init_exit.cc
index 54b6df73954..57b07579291 100644
--- a/source/blender/windowmanager/intern/wm_init_exit.cc
+++ b/source/blender/windowmanager/intern/wm_init_exit.cc
@@ -76,7 +76,7 @@
 #endif
 
 #include "GHOST_C-api.h"
-#include "GHOST_Path-api.h"
+#include "GHOST_Path-api.hh"
 
 #include "RNA_define.h"
 
diff --git a/source/blender/windowmanager/wm_event_types.h b/source/blender/windowmanager/wm_event_types.h
index e17e1ae512e..467ee99b241 100644
--- a/source/blender/windowmanager/wm_event_types.h
+++ b/source/blender/windowmanager/wm_event_types.h
@@ -244,7 +244,7 @@ enum {
   /* *** End of keyboard codes. *** */
 
   /* NDOF (from "Space Navigator" & friends)
-   * These must be kept in sync with `GHOST_NDOFManager.h`.
+   * These must be kept in sync with `GHOST_NDOFManager.hh`.
    * Ordering matters, exact values do not. */
 
   /**