ライブラリの中のターゲットで Logging みたいな名前が付いてると別の Logging とぶつかる問題。

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https://github.com/apple/swift-tools-support-core/blob/main/Package.swift#L64

swift-tools-support-core/Package.swift at main · apple/swift-tools-...

Contains common infrastructural code for both SwiftPM and llbuild. - swift-tools-support-core/Package.swift at main · apple/swift-tools-support-core

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 .target( /** TSCBasic support library */ name: "TSCBasic", dependencies: [ "TSCLibc", "TSCclibc", .product(name: "SystemPackage", package: "swift-system"), ], exclude: CMakeFiles + ["README.md"]),

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この問題があるから、 swift-tools-support-core とかは内部ターゲットに TSC prefix を付けるなどしている