Having issues compiling the IOPCIFamily kext

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Created Oct ’22

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I am trying to compile the IOPCIFamily kext, but it isn't working with me. I'm normally pretty good with troubleshooting, but I'm at a complete loss. I don't even know where to begin 😆 I saw someone say on a thread from 4 years ago that you need to compile XNU to compile IOPCIFamily. I successfully compiled XNU (after much trial and error), but now I'm not sure what to do with it. Could anyone point me in the right direction? Thanks! Screen Shot 2022-10-27 at 9.12.29 PM.png

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DTS Engineer OP

Apple

Oct ’22

[It’d help if you included the error as text rather than a screen shot. See Quinn’s Top Ten DevForums Tips for this and other tips.]

The error you’re seeing:

unable to resolve product type 'com.apple.product-type.kernel-extension.iokit.shallow' for platform 'macosx'

relates to a fundamental but generally hidden feature of Xcode:

Every target has a product type. For example, an app target builds differently than a framework target which builds differently than a kext target.
That product type must be supported by your platform. You can’t, for example, build a kext target for iOS.
The way that the product type builds can vary by platform. For example, Xcode builds macOS frameworks differently than iOS frameworks.

You can’t change the product type of a target. It’s set when you create the target and is fixed after that.

If you dig into the Xcode project file, you’ll see the product manifest as a property called productType. For third-party kexts, this is always com.apple.product-type.kernel-extension.

In this case the target you’re trying to build uses a product type (com.apple.product-type.kernel-extension.iokit.shallow) that’s not supported by your platform (macosx). I suspect that this is because you’re using the public macOS SDK, which supports fewer product types than the internal SDK used by engineering teams at Apple. However, I don’t have all the details here because, like you, I work exclusively with Apple’s public tools.

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
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