The WK_NOT_ build settings can invert "" to "YES" and "YES" to "NO", but can't invert "NO" to "YES". This is problematic for other build configuration that builds upon this construction and only ever expects a value of YES or NO. `WK_NOT_NO` should be defined, with a value of "YES".
<rdar://problem/93984643>
https://github.com/WebKit/WebKit/pull/1058
Committed r294897 (251020@main): <https://commits.webkit.org/251020@main> Reviewed commits have been landed. Closing PR #1058 and removing active labels.