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#Xcode experts: I have a Mac Catalyst app which contains a non-catalyst helper, so when I build the Catalyst app’s target, it also builds the helper. This has worked fine until I’ve now made the helper target link against a static library target. If I build the helper on its own, it works fine, but when built implicitly via the catalyst target, it tries to link against the catalyst binary of the library, which fails. (build/Debug-maccatalyst/libWhatever.a rather than build/Debug/libWhatever.a)
The “ask for help” trick worked again. Enabling “Allow multi-platform builds” in the library target seems to have fixed it. 