Unknown type name 'NSUInteger' with Xcode 15.4

[scottkdavis]

Description

After cloning the repo, open template project in VS Code, set debug target to MacOS, attempt to debug. Receive 9 errors about unknown types for NSUInteger, NSInteger, and NSIntegerMax in NSObjCRuntime.h file buried deep in Xcode.app under the iPhoneOS17.5 folder.

If I removed iOS in the project file so only net8.0-maccatalyst is listed as a target framework. I also receive NS_FORMAT_ARGUMENT error in the NSString.h file inside Xcode.app.

Searching the internet, this seems to be an issue with Xcode 15.4 that doesn't exist in 15.2. Maui 8 is supposed to support 15.4

Like most people who are probably looking at the Maui.NativeLibraryInterop, I'm an Xcode noob and have no idea how to troubleshoot this issue. I assume I cannot roll Xcode back to 15.2 because experience shows me that Maui needs a very specific version to work.

Steps to Reproduce

Close repo, attempt to run debug "template" project without modification.

Link to public reproduction project repository

No response

Environment

• OS: MacOS Sonoma 14.5 (M1 chip)
• .NET MAUI: 8
• Target platforms: MacOS, iOS