とりあえずswiftlintをユニバーサルバイナリにするPRを書いてみた。 https://github.com/realm/SwiftLint/pull/3437

[Makefile] Build swiftlint as a universal binary on macOS by nori...

SwiftPM 5.3 uses the XCBuild.framework to generate universal binaries when it receives multiple --arch options. In that case, --show-bin-path returns .build/apple/Products/Release.