Can't generate Xcode project

[danielfalbo]

Describe the bug

After building the toolchain using Ninja, I'm trying to create Xcode projects for LLVM and Swift with as according to the Using ninja with Xcode guide, but the command is failing.

I'm getting a couple of errors all similar to

CMake Error in SwiftCompilerSources/CMakeLists.txt:
  The custom command generating

    /Users/danielfalbo/Developer/swift-project/build/Xcode-DebugAssert/swift-macosx-arm64/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)/lib/swift/macosx/x86_64/libcxxshim.modulemap

  is attached to multiple targets:

    lib-swift-macosx-x86_64-libcxxshim.modulemap
    lib-swift-macosx-arm64-libcxxshim.modulemap

  but none of these is a common dependency of the other(s).  This is not
  allowed by the Xcode "new build system".

Steps To Reproduce

Just run

utils/build-script --skip-build --xcode --skip-early-swift-driver

Expected behavior

Build succeeding.

Environment (please fill out the following information)

• OS: macOS 12.4 on M1 MacBook Air
• Xcode Version/Tag/Branch: Xcode 13.4.1 (13F100)

Additional context

Full output: xcodeOutput.txt

Hashes: hashes.txt

[danielfalbo]

Swift forum post: https://forums.swift.org/t/stuck-newbie-needs-help-cant-generate-xcode-project/58971

[danielfalbo]

Finally managed to successfully generate the Xcode project (see forum post), closing this.