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It seems as though the way the MarketingCloudSDK Swift Package Module is built that it cannot be included in projects that use a different version of the Swift compiler. When trying to use the Swift Package for 8.0.3 in my team's project we get the following error:

Failed to build module 'MarketingCloudSDK'; this SDK is not supported by the compiler (the SDK is built with 'Apple Swift version 5.4 (swiftlang-1205.0.26.9 clang-1205.0.19.55)', while this compiler is 'Apple Swift version 5.5.2 (swiftlang-1300.0.47.5 clang-1300.0.29.30)'). Please select a toolchain which matches the SDK.

We are building with the latest Xcode, version 13.2.1.

There is an issue on Stack Overflow similar to this with possible resolution steps: https://stackoverflow.com/questions/70556401/swift-version-conflict-this-sdk-is-not-supported-by-the-compiler-please-select

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  • I was able to build and archive an app with Xcode version 13.2.1 using swift version 5.5.2 and Marketing Cloud SDK 8.0.3. Is there a certain step or setting you are seeing this happen with?
    – Skyler Tanner
    Commented Jan 13, 2022 at 14:35
  • Our project is very large so to isolate the problem I created a new empty project in Xcode that contained just a view controller and then included the Swift Package and tried to import MarketingCloudSDK and I get the same issue. So I don't believe it is any particular setting in our project.
    – Joey
    Commented Jan 13, 2022 at 20:17
  • Perhaps I should add that this is being built on an Intel MacBook for x86_64 simulator.
    – Joey
    Commented Jan 13, 2022 at 20:21
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    I have verified I am using Swift compiler v5.5.2. I noticed on your sample app that you are only pulling in MarketingCloudSDK. That alone will not work. Via the documentation, when moving to MarketingCloudSDK v8.0+, be advised you will also need to bring in the (Core) SFMCSdk swift package. Ref: salesforce-marketingcloud.github.io/MarketingCloudSDK-iOS/…
    – Skyler Tanner
    Commented Jan 19, 2022 at 14:51
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    Ah! Okay. That fixes it. I totally missed the notes on this migration. I always just reference this page salesforce-marketingcloud.github.io/MarketingCloudSDK-iOS. I think it would be helpful if there was a callout somewhere in the body of that page about migrating with the link (other than just the sidebar). I wasn't aware there was any migration steps to update to from 7.x to 8+. Thanks for the help!
    – Joey
    Commented Jan 19, 2022 at 17:19

1 Answer 1

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For MarketingCloudSDK v8.x and above you also need to pull in the SFMCSdk Swift package. Migration steps outlined here: https://salesforce-marketingcloud.github.io/MarketingCloudSDK-iOS/get-started/get-started-migration.html

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  • These step are not clear, it will be nice if some one can add it into sample project as it crashing on some devices
    – Ajay Singh Mehra
    Commented Sep 30, 2022 at 4:46

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