webkitgtk-2.52.0/Source/WebCore/platform/graphics/ShareableBitmap.h:61:139: error: expected unqualified-id before numeric constant
   61 |     WEBCORE_EXPORT ShareableBitmapConfiguration(const IntSize&, std::optional<DestinationColorSpace> = std::nullopt, Headroom = Headroom::None, bool isOpaque = false);
      |                                                                                                                                           ^~~~
webkitgtk-2.52.0/Source/WebCore/platform/graphics/ShareableBitmap.h:105:37: error: expected unqualified-id before numeric constant
  105 |     Headroom m_headroom { Headroom::None };
      |                                     ^~~~
build/amd64/WebCore/PrivateHeaders/WebCore/ImageFrame.h:151:69: error: could not convert '{<expression error>}' from '<brace-enclosed initializer list>' to 'WebCore::ImageOrientation'
  151 |     ImageOrientation m_orientation { ImageOrientation::Orientation::None };
      |                                                                     ^~~~
      |                                                                     |
      |                                                                     <brace-enclosed initializer list>
build/amd64/WebCore/PrivateHeaders/WebCore/ImageSource.h:109:140: error: expected unqualified-id before numeric constant
  109 |     virtual ImageOrientation frameOrientationAtIndex(unsigned) const { RELEASE_ASSERT_NOT_REACHED(); return ImageOrientation::Orientation::None; }
      |                                                                                                                                            ^~~~
webkitgtk-2.52.0/Source/WebCore/platform/graphics/transforms/TransformationMatrix.h:274:9: error: expected '}' before numeric constant
  274 |         None,
      |         ^~~~
webkitgtk-2.52.0/build/amd64/WebCore/PrivateHeaders/WebCore/SharedMemory.h:57:27: error: expected identifier before numeric constant
   57 | enum class MemoryLedger { None, Default, Network, Media, Graphics, Neural };
      |                           ^~~~

--- webkitgtk-2.52.0/Source/WebCore/platform/graphics/ShareableBitmap.h.~1~
+++ webkitgtk-2.52.0/Source/WebCore/platform/graphics/ShareableBitmap.h
@@ -54,6 +54,10 @@
 inline constexpr auto defaultCopyOnWrite = SharedMemory::CopyOnWrite::No;
 #endif
 
+#if defined(None)
+#undef None
+#endif
+
 class ShareableBitmapConfiguration {
 public:
     ShareableBitmapConfiguration() = default;
--- webkitgtk-2.52.0/Source/WebCore/platform/graphics/ImageFrame.h.~1~
+++ webkitgtk-2.52.0/Source/WebCore/platform/graphics/ImageFrame.h
@@ -33,6 +33,10 @@
 #include <WebCore/NativeImage.h>
 #include <wtf/Seconds.h>
 
+#if defined(None)
+#undef None
+#endif
+
 namespace WebCore {
 
 class ImageFrame {
--- webkitgtk-2.52.0/Source/WebCore/platform/graphics/ImageSource.h.~1~
+++ webkitgtk-2.52.0/Source/WebCore/platform/graphics/ImageSource.h
@@ -30,6 +30,10 @@
 #include <WebCore/ImageTypes.h>
 #include <wtf/ThreadSafeWeakPtr.h>
 
+#if defined(None)
+#undef None
+#endif
+
 namespace WebCore {
 
 class FragmentedSharedBuffer;
--- webkitgtk-2.52.0/Source/WebCore/platform/graphics/transforms/TransformationMatrix.h.~1~
+++ webkitgtk-2.52.0/Source/WebCore/platform/graphics/transforms/TransformationMatrix.h
@@ -57,6 +57,10 @@
 #endif
 #endif
 
+#if defined(None)
+#undef None
+#endif
+
 namespace WTF {
 class TextStream;
 }
--- webkitgtk-2.52.0/Source/WebCore/platform/SharedMemory.h.~1~
+++ webkitgtk-2.52.0/Source/WebCore/platform/SharedMemory.h
@@ -48,6 +48,10 @@
 OBJC_CLASS NSData;
 #endif
 
+#if defined(None)
+#undef None
+#endif
+
 namespace WebCore {
 
 class FragmentedSharedBuffer;
--- webkitgtk-2.52.0/Source/WebCore/rendering/style/RenderStyleConstants.h.old
+++ webkitgtk-2.52.0/Source/WebCore/rendering/style/RenderStyleConstants.h
@@ -33,6 +33,23 @@
 #include <wtf/EnumSet.h>
 #include <wtf/EnumTraits.h>
 
+#if defined(None)
+#undef None
+#endif
+
+#if defined(Below)
+#undef Below
+#endif
+
+#if defined(Always)
+#undef Always
+#endif
+
+#if defined(Above)
+#undef Above
+#endif
+
+
 namespace WTF {
 class TextStream;
 }
--- webkitgtk-2.52.0/Source/WebCore/dom/Document.h.old
+++ webkitgtk-2.52.0/Source/WebCore/dom/Document.h
@@ -82,6 +82,22 @@
 #include <wtf/ThreadingPrimitives.h>
 #endif
 
+#if defined(FocusIn)
+#undef FocusIn
+#endif
+
+#if defined(FocusOut)
+#undef FocusOut
+#endif
+
+#if defined(None)
+#undef None
+#endif
+
+#if defined(Left)
+#undef Left
+#endif
+
 namespace JSC {
 class CallFrame;
 class InputCursor;
--- webkitgtk-2.52.0/Source/WebCore/editing/VisibleSelection.h.old
+++ webkitgtk-2.52.0/Source/WebCore/editing/VisibleSelection.h
@@ -28,6 +28,10 @@
 #include <WebCore/TextGranularity.h>
 #include <WebCore/VisiblePosition.h>
 
+#if defined(None)
+#undef None
+#endif
+
 namespace WebCore {
 
 // On Mac, Shift-arrow keys move the anchor in a strongly directional selection
--- webkitgtk-2.52.0/Source/WebCore/editing/FrameSelection.h.old
+++ webkitgtk-2.52.0/Source/WebCore/editing/FrameSelection.h
@@ -39,6 +39,10 @@
 #include <wtf/Platform.h>
 #include <wtf/TZoneMalloc.h>
 
+#if defined(Always)
+#undef Always
+#endif
+
 namespace WebCore {
 
 class CharacterData;
--- webkitgtk-2.52.0/Source/WebCore/html/HTMLTextFormControlElement.h.old
+++ webkitgtk-2.52.0/Source/WebCore/html/HTMLTextFormControlElement.h
@@ -28,6 +28,10 @@
 #include <WebCore/PointerEventTypeNames.h>
 #include <wtf/ValueOrReference.h>
 
+#if defined(None)
+#undef None
+#endif
+
 namespace WebCore {
 
 class Position;
--- webkitgtk-2.52.0/Source/WebCore/editing/FontAttributes.h.old
+++ webkitgtk-2.52.0/Source/WebCore/editing/FontAttributes.h
@@ -33,6 +33,15 @@
 #include <wtf/RetainPtr.h>
 #include <wtf/text/WTFString.h>
 
+#if defined(None)
+#undef None
+#endif
+
+#if defined(Left)
+#undef Left
+#endif
+
+
 OBJC_CLASS NSDictionary;
 OBJC_CLASS NSTextList;
 
--- webkitgtk-2.52.0/Source/WebKit/Shared/EditorState.h.old
+++ webkitgtk-2.52.0/Source/WebKit/Shared/EditorState.h
@@ -43,6 +43,10 @@
 #include <WebCore/DictationContext.h>
 #endif
 
+#if defined(None)
+#undef None
+#endif
+
 namespace WTF {
 class TextStream;
 };
--- webkitgtk-2.52.0/Source/WebCore/editing/EditingStyle.h.old
+++ webkitgtk-2.52.0/Source/WebCore/editing/EditingStyle.h
@@ -39,6 +39,10 @@
 #include <wtf/TriState.h>
 #include <wtf/text/WTFString.h>
 
+#if defined(None)
+#undef None
+#endif
+
 namespace WebCore {
 
 class CSSStyleProperties;
--- webkitgtk-2.52.0/Source/WebKit/WebProcess/WebPage/glib/WebPageGLib.cpp.old
+++ webkitgtk-2.52.0/Source/WebKit/WebProcess/WebPage/glib/WebPageGLib.cpp
@@ -66,6 +66,10 @@
 #include <xf86drm.h>
 #endif
 
+#if defined(True)
+#undef True
+#endif
+
 namespace WebKit {
 using namespace WebCore;