Showing Recent Messages Disabling previews because SWIFT_VERSION is set and SWIFT_OPTIMIZATION_LEVEL=-O, expected -Onone

Question

janAccount OP

Created Oct ’24

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After updated MAC OS I am getting this error in swift version 16.0 and MAC OS VERSION 15.0.1

note: Disabling previews because SWIFT_VERSION is set and SWIFT_OPTIMIZATION_LEVEL=-O, expected -Onone (in target 'Closures' from project 'Pods')

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Answer 1

DTS Engineer OP

Apple

Oct ’24

If you create a new test project from one of the built-in templates, does it have the same problem?

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Answer 2

Frameworks Engineer OP

Apple

Oct ’24

That is a build log message pointing out that the Closures target in the Pods project is not built with -Onone which is necessary if the target is used when running Previews.

It's not an error, just a build log "note:". If you indeed intend to build this project with optimizations then you can ignore it.

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