Builder fails with Xcode 15 (worked around for now)

[lemonmojo]

Xcode 15 seems to have issues with symlinks when creating XCFrameworks.

The fix likely involves passing it absolute/resolved paths.

[lemonmojo]

Workaround is now in place until an Xcode update which fixes the issue is out.

[lemonmojo]

We could further improve the code by resolving symlinks on macOS using [NSString stringByResolvingSymlinksInPath].

For reference, here's a quick POC showing how to call ObjC from C#: https://github.com/lemonmojo/SimpleDotNETObjCInterop

There's now a string extension in the repo called ResolveSymlinks_AppleOnly which resolves symlinks using NSString APIs. It's not in use yet though.

[lemonmojo]

Another problem here is that .NET 8 RC1's NativeAOT doesn't play nice with Xcode 15's new linker. See dotnet/runtime#92491.

As mentioned here, we worked around this by adding -ld_classic as an additional linker flag in the generated csproj for now.

We hope to be able to remove this once .NET 8 RC2 is out.

[lemonmojo]

-ld_classic is not required with RC2 anymore so the workaround has been removed in e133610.

[lemonmojo]

I haven't yet tested if Xcode 15.1 Beta fixes the symlink issue with xcodebuild. I'll check when 15.1 is released.

[lemonmojo]

Still not fixed in Xcode 15.1

[lemonmojo]

Note to self: Test again with Xcode 16 Beta