Xcode building for iOS Simulator, but linking in an object file built for iOS, for architecture "arm64"

Matheus Mello
Matheus Mello
September 2, 2023
Cover Image for Xcode building for iOS Simulator, but linking in an object file built for iOS, for architecture "arm64"

📱 Xcode Building for iOS Simulator, but Linking in Object File Built for iOS, for Architecture 'arm64'

Are you facing the annoying error "building for iOS Simulator, but linking in object file built for iOS, for architecture 'arm64'" when trying to build your project in Xcode 12? Don't worry, you're not alone! This is a common issue that many developers encounter, especially when migrating a codebase from Objective-C to Swift. In this blog post, we'll explore the possible causes of this problem and walk you through some easy solutions.

💡 Understanding the Issue

The error message suggests that you are trying to build your project for the iOS Simulator, but there is an object file (likely from a framework or library) that was built for iOS devices. The mismatch in architectures causes Xcode to raise this error during the linking phase.

🤔 Possible Causes

There could be several reasons why this issue occurs:

  1. Outdated Framework: The framework or library you are using might not have been updated to support the latest version of Xcode and iOS. In some cases, the framework might only support physical devices and not the simulator.

  2. Build Settings Mismatch: The build settings of your project might be misconfigured, causing Xcode to select the wrong architecture during the build process. This can happen when migrating codebases or when using outdated build settings.

🔧 Easy Solutions

Now that we understand the issue, let's explore some easy solutions to get rid of this error:

1. Update Your Frameworks

Check if the frameworks or libraries in your project have updates available. Visit their official websites or GitHub repositories to ensure you are using the latest versions that are compatible with Xcode 12 and iOS 14.

2. Reset Build Settings

Sometimes, incorrect build settings can cause this issue. To fix it, try resetting the build settings of your project:

  1. In Xcode, go to your project's Build Settings.

  2. Search for the Valid Architectures setting.

  3. Remove any outdated or unsupported architectures, such as armv7 and armv7s, leaving only arm64.

  4. Clean and rebuild your project.

3. Check Framework Compatibility

If the error persists, inspect the compatibility of the frameworks you are using:

  1. Open the terminal and navigate to the directory containing the framework file.

  2. Run the command lipo -info <framework_name> to see the architectures supported by the framework.

  3. Ensure that the framework supports arm64, the architecture required by Xcode 12.

  4. If the framework doesn't support arm64, check for an updated version or contact the framework's developers for support.

😎 Let's Get Back to Coding

By following these easy solutions, you should be able to overcome the "building for iOS Simulator, but linking in object file built for iOS, for architecture 'arm64'" error. Take a deep breath and get back to coding with the latest Xcode and iOS versions!

If you found this blog post useful, don't forget to share it with your fellow developers. Let us know in the comments if you have any other questions or if there are any other Xcode-related issues you'd like us to cover in future blog posts. Happy coding! 💻🚀

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