https://forums.swift.org/t/swift-build-failure-with-ninja-and-xcode-11-5-default-toolchain-when-building-xctest-compiler-mismatch/37937

Swift build failure with ninja and Xcode 11.5 default toolchain whe...

Hi everybody, A couple of days ago I stopped being able to build swift, which is weird. The configuration is MacOS 10.5.5 with Xcode 11.5 (Version 11.5 (11E608c)) and the default toolchain (although I have had the same thing happen with other toolchains, and swift also won't...

11:06 PM

Xcode 12じゃないとだめなのかあ

11:06 PM

macOS To build for macOS, you need Xcode 12 beta 3. The required version of Xcode changes frequently, and is often a beta release. Check this document or the host information on https://ci.swift.org for the current required version.