Getting "an attribute specifier sequence in this position is a C++23 extension" when trying to build Bun

[crishoj]

I'm on macOS, followed https://bun.sh/docs/project/contributing and made sure clang-18 is in my path.

bun run build fails at...

-- Generating done (0.1s)
-- Build files have been written to: /Users/christian/Code/bun/build/debug
  cmake took 0.51 seconds
CMake Build
  $ cmake --build /Users/christian/Code/bun/build/debug
[0/2] Re-checking globbed directories...
[0/416] Building CXX object CMakeFiles/bun-debug.dir/src/bun.js/bindings/BunObject.cpp.o

...with errors like the following:

cache/webkit-c333de54223425d7/include/wtf/RunLoop.h:253:58: error: an attribute specifier sequence in this position is a C++23 extension [-Werror,-Wc++23-lambda-attributes]
  253 |             : Timer(WTFMove(runLoop), [object, function] SUPPRESS_UNCOUNTED_LAMBDA_CAPTURE { // The Timer's owner is expected to cancel the Timer in its destructor.
      |                                                          ^
cache/webkit-c333de54223425d7/include/wtf/Compiler.h:565:5: note: expanded from macro 'SUPPRESS_UNCOUNTED_LAMBDA_CAPTURE'
  565 |     IGNORE_CLANG_STATIC_ANALYZER_WARNINGS_ATTRIBUTE("webkit.UncountedLambdaCapturesChecker")
      |     ^
cache/webkit-c333de54223425d7/include/wtf/Compiler.h:512:71: note: expanded from macro 'IGNORE_CLANG_STATIC_ANALYZER_WARNINGS_ATTRIBUTE'
  512 | #define IGNORE_CLANG_STATIC_ANALYZER_WARNINGS_ATTRIBUTE(warning, ...) [[clang::suppress]]
      |                                                                       ^
2 errors generated.
ninja: build stopped: subcommand failed.
  cmake took 6.07 seconds
  Command exited: code 1
error: script "build:debug" exited with code 1
error: script "build" exited with code 1

Anyone has a clue what I'm doing wrong?

[crishoj]

No longer an issue with latest main.