Cannot generate project files on Apple Silicon Macs

[tieleman]

Describe the bug, issue or concern

On Apple Silicon Macs you cannot generate the project files out-of-the-box. It fails while linking XcodeGen due to an architecture mismatch. This can be worked around by adding the correct architecture in Makefile:

build_xcodegen:
	cd vendor/XcodeGen && swift build -c release -Xswiftc "-target" -Xswiftc "arm64-apple-macosx10.13"

Maybe something like uname -m (will return x86_64 on Intel and arm64 on AS) can be used in the Makefile to insert the correct architecture at run time.

To Reproduce

Steps to reproduce the behavior:

1. Clone the repo on your M1 Mac (I'm using a Mac mini)
2. make dev
3. Wait for XcodeGen to build
4. See error:

ld: warning: ignoring file /Users/tieleman/Documents/Code/nl-covid19-notification-app-ios/vendor/XcodeGen/.build/arm64-apple-macosx/release/CYaml.build/src/api.c.o, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
ld: warning: ignoring file /Users/tieleman/Documents/Code/nl-covid19-notification-app-ios/vendor/XcodeGen/.build/arm64-apple-macosx/release/CYaml.build/src/emitter.c.o, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
ld: warning: ignoring file /Users/tieleman/Documents/Code/nl-covid19-notification-app-ios/vendor/XcodeGen/.build/arm64-apple-macosx/release/CYaml.build/src/parser.c.o, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
ld: warning: ignoring file /Users/tieleman/Documents/Code/nl-covid19-notification-app-ios/vendor/XcodeGen/.build/arm64-apple-macosx/release/CYaml.build/src/reader.c.o, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
ld: warning: ignoring file /Users/tieleman/Documents/Code/nl-covid19-notification-app-ios/vendor/XcodeGen/.build/arm64-apple-macosx/release/CYaml.build/src/scanner.c.o, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
ld: warning: ignoring file /Users/tieleman/Documents/Code/nl-covid19-notification-app-ios/vendor/XcodeGen/.build/arm64-apple-macosx/release/CYaml.build/src/writer.c.o, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
ld: warning: ignoring file /Users/tieleman/Documents/Code/nl-covid19-notification-app-ios/vendor/XcodeGen/.build/arm64-apple-macosx/release/XcodeProjCExt.build/XCPStringEscape.c.o, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
ld: warning: ignoring file /Users/tieleman/Documents/Code/nl-covid19-notification-app-ios/vendor/XcodeGen/.build/arm64-apple-macosx/release/XcodeProjCExt.build/XCPHashing.c.o, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
Undefined symbols for architecture x86_64:
  "_XCPComputeMD5", referenced from:
      _$sSS9XcodeProjE3md5SSvgSSSWXEfU_ in String+md5.swift.o
  "_XCPEscapedString", referenced from:

[snip missing symbols]

  "_yaml_stream_start_event_initialize", referenced from:
      _$s4Yams7EmitterC4openyyKF in Emitter.swift.o
ld: symbol(s) not found for architecture x86_64
<unknown>:0: error: link command failed with exit code 1 (use -v to see invocation)
[17/18] Linking xcodegen
make: *** [build_xcodegen] Error 1

Expected behavior

I'd expect the build to complete so I can run make project.

Governance

• I've read the contributing document https://github.com/minvws/.github/blob/master/CONTRIBUTING.md
• I've read and understand the Code of Conduct https://github.com/minvws/.github/blob/master/CODE_OF_CONDUCT.md
• I understand that any contributions or suggestions I made may make it into the actual code. I've read the License https://github.com/minvws/nl-covid19-notification-app-coordination/blob/master/LICENSE.txt and the contributor license agreement https://github.com/minvws/nl-covid19-notification-app-coordination/blob/master/CLA.md

[roelspruit]

Hi,

Thanks for the nice catch. As you might have guessed none of the iOS developers in the core team have an M1 Mac yet so we didn't notice.

I see that Xcodegen has been updated with support for building for M1 in their own makefile. I'm going to mirror this ticket on our internal issue board and we can try to upgrade Xcodegen while we're at it. I'll keep this ticket here open as a reference and we'll close it when we're done.

Once again, thanks for the catch and the report!

Roel

[tieleman]

Glad to help! I did update XcodeGen at first to see if that would fix it, but it didn't. However, after fixing the Makefile and updating XcodeGen it does work correctly, so I guess you could update that as well in one go. 👍

[roelspruit]

I updated Xcodegen (and our makefile) in the master branch. Could you try to build this on your AS mac to verify that it works correctly?

[tieleman]

Just checked it quickly: XcodeGen will build and the project files can be generated and opened in Xcode.

[roelspruit]

great to hear. Thanks for checking. I'll close this ticket now