Passing --arch parameter to LLDB

[adam-fowler]

Is there a setting to pass a --arch parameter to the invocation of lldb?

[vadimcn]

I think you can use settings set target.default-arch ....

[adam-fowler]

I can make this call in lldb, but is it possible to get CodeLLDB to set this up?

My issue is since the release of Swift 5.6 the swift version of lldb does not automatically choose the executable from a universal binary based on the system it is running on. It expects you to specify it via --arch. If you don't you get the error

error: more than one platform supports this executable (host, remote-macosx), specify an architecture to disambiguate

To run tests on macOS we are required to use the test framework executable xctest from Xcode. This happens to be a universal binary. So running tests with Swift 5.6 is currently broken until I can find a way to specify the architecture.

[adam-fowler]

Ok I think I've got slightly further. I added "initCommands": ["settings set target.default-arch x86_64"] to my launch config but I'm still seeing the error from above.

Even if I do the following in an instance of lldb outside of VSCode. It doesn't work.

settings set target.default-arch x86_64
file /Applications/Xcode.app/Contents/Developer/usr/bin/xctest

[vadimcn]

Ok, I'll need to investigate what's going on there...

Meanwhile, you can go the custom launch route and specify arch in target create --arch <arch> <file>.

[adam-fowler]

Cheers. I have looked at generating a custom launch and it does work.