While working on cleaning up things for https://bugs.webkit.org/show_bug.cgi?id=196704 I'm expecting to see some things that can be refactored or need to be fixed but can't be addressed till later in the process. This bug is meant to track those things so they don't get lost in the shuffle.
In Source/WTF/wtf/CMakeLists.txt the WTF_INCLUDE_DIRECTORIES should only propagate bmalloc includes. Not fixing yet because this causes a bunch of unrelated changes to be needed.
In Source/WTF/wtf/CMakeLists.txt the forwarding headers directory is used for copying the unified bundles script. This also requires changes to WebKitMacros.cmake
I have no idea why there are calls to WEBKIT_CREATE_FORWARDING_HEADERS inside of WTF in Source/WTF/wtf/PlatformMac.cmake