How to set the swift compiler version?

Question

Created Oct ’20

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Hi,

I am new at developing with Swift so I guess I am missing something...

I have an iOS app built in Swift 3, which is no longer supported in xCode. So I guess I need to migrate to a newer version of swift. Xcode (10.1) suggests Swift 4.2.
But ... There is a dependency which uses Swift 3. I tried recompiling this library (using Xcode 12.1 because I get some built errors in Xcode 10.1). In that project the Swift version is set on Swift 4.2. I compiled the and added the package to the original app.

Now I get an error: Module compiled with Swift 5.3 cannot be imported by the Swift 4.2 compiler.

How can is get the package compiled with Swift 4.2?

Thanks

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Answer 1

Claude31 OP

Oct ’20

Can't you recompile the library with Xcode 10.1 ? In order to have everything at the same level ?

Or port all to 5.3 if that's possible.

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Answer 2

Wim-Kaspar OP

Oct ’20

I have started with the port to 5.3 but why is the build of the package still 5 while i tell it to use the swift 4 compiler?

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