Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 26754398e658acc6e3dfd1ed9122f87be6452fa9
      
https://github.com/WebKit/WebKit/commit/26754398e658acc6e3dfd1ed9122f87be6452fa9
  Author: Elliott Williams <[email protected]>
  Date:   2024-11-15 (Fri, 15 Nov 2024)

  Changed paths:
    M Source/WebKit/Configurations/Base.xcconfig

  Log Message:
  -----------
  [Swift in WebKit] Downlevel build failure "error: -enable-upcoming-feature 
IsolatedDefaultValues"
https://bugs.webkit.org/show_bug.cgi?id=283219
rdar://140004811

Unreviewed build fix.

Old versions of swift are complaining about not recognizing these
compiler flags, despite AFAICT the language officially supporting the
"enable-upcoming-feature" directive.

    SwiftDriver WebKit normal x86_64 com.apple.xcode.tools.swift.compiler (in 
target 'WebKit' from project 'WebKit')
    ...
    warning: Save unknown driver flag -enable-upcoming-feature as additional 
swift-frontend flag (in target 'WebKit' from project 'WebKit')
    error: Unexpected input file: 
OpenSource/Source/WebKit/IsolatedDefaultValues (in target 'WebKit' from project 
'WebKit')

This isn't affecting open source builds, so maybe it's due to a slight
difference between compilers. I see that other options like this one are
passed directly to the frontend with -Xfrontend. Do that as a
speculative fix.

* Source/WebKit/Configurations/Base.xcconfig:

Canonical link: https://commits.webkit.org/286682@main



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