Orion doesn't build correctly on Xcode 12.5

[ja1dan]

In the IDE, next to the first line with "import Orion" on it, this shows:
Failed to build module 'Orion' from its module interface; the compiler that produced it, 'Apple Swift version 5.2.4 (swiftlang-1103.0.32.9 clang-1103.0.32.53)', may have used features that aren't supported by this compiler, 'Apple Swift version 5.4 (swiftlang-1205.0.24.6 clang-1205.0.19.54)'
Upon building with make clean all messages=yes, I get this: Orion does not support this version of Swift yet. Please check https://github.com/theos/Orion for progress updates. #error("""

[kabiroberai]

afaict there's no breaking changes in Swift 5.4 that should affect Orion. At this point I'm just waiting for Apple to release swift-syntax for Swift 5.4: see https://github.com/apple/swift-syntax#usage.

[kabiroberai]

Fixed with e357ada. Turns out due to a compiler bug Orion.framework crashes the 5.4 compiler but that's irrelevant to users of the framework since the only thing that clients need to build is the preprocessor which now works fine.