same issue, and 15.1 is not working.
now you will be prompted:
Error: Your Xcode (15.0) is outdated.
Please update to Xcode 15.4 (or delete it).
Xcode can be updated from the App Store.
but if you are using 15.4 still get the error message:
Error: apple/apple/game-porting-toolkit 1.1 did not build
Logs:
/Users/AAAA/Library/Logs/Homebrew/game-porting-toolkit/00.options.out
/Users/AAAA/Library/Logs/Homebrew/game-porting-toolkit/01.configure
/Users/AAAA/Library/Logs/Homebrew/game-porting-toolkit/01.configure.cc
/Users/AAAA/Library/Logs/Homebrew/game-porting-toolkit/02.make
/Users/AAAA/Library/Logs/Homebrew/game-porting-toolkit/wine64-build
If reporting this issue please do so to (not Homebrew/brew or Homebrew/homebrew-core):
apple/apple