Description

Besides embedded targets my installed Swift toolchain is unusable. It is incapable of compiling any code that in any way depends on the Darwin module. This makes it impossible to use system APIs, any C/C++ libraries that depend on the OS like SDL2, Swift scripts that import Darwin, language features like macros which depend on SwiftSyntax and so on.

There appears to be a conflict between Swift toolchains and the SDK provided by the latest (either 15.0 or 15.1) developer beta of Xcode. Using the built in Swift toolchain from Xcode works but is missing some features I need from newer toolchains.

Reproduction

N/A

Expected behavior

The toolchains to be usable.

Environment

Apple Swift version 6.1-dev (LLVM 9d45b9c9d5c48a0, Swift 08721cf939ec503)
Target: arm64-apple-macosx15.0

Additional information

No response