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Packages can now declare executable targets

Available from Swift 5.4

Paul Hudson      @twostraws

SE-0294 adds a new target option for apps using Swift Package manager, allowing us to explicitly declare an executable target.

This is particularly important for folks who want to use SE-0281 (using @main to mark your program’s entry point), because it didn’t play nicely with Swift Package Manager – it would always look for a main.swift file.

With this change, we can now remove main.swift and use @main instead. Note: You must specify // swift-tools-version:5.4 in your Package.swift file in order to get this new functionality.

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Other changes in Swift 5.4…

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