Trouble with platforming Bevy on mac

[JanCVanB]

I'm trying to get a simple Bevy-based game platform working, but I'm stuck on the "hello world" step. See d58b818 on ignore_noncontribution_bevy_debugging.

This seems like the crux of the issue (and it seems related to rust-lang/rust#91372) :

[nix-shell:~/code/clones/roc]$ cargo run examples/hello-rust/Hello.roc
   Compiling libc v0.2.106
   ...
   Compiling roc_cli v0.1.0 (/Users/jan/code/clones/roc/cli)
    Finished dev [unoptimized + debuginfo] target(s) in 3m 19s
     Running `target/debug/roc examples/hello-rust/Hello.roc`
🔨 Rebuilding host... Done!
Undefined symbols for architecture x86_64:
  "_AudioComponentFindNext", referenced from:
      __ZN9coreaudio10audio_unit9AudioUnit14new_with_flags17heb6ec65f112e010bE in host.o
  ...
  "_AudioUnitUninitialize", referenced from:
      __ZN9coreaudio10audio_unit9AudioUnit12uninitialize17h3386111a26093dcbE in host.o
      __ZN74_$LT$coreaudio..audio_unit..AudioUnit$u20$as$u20$core..ops..drop..Drop$GT$4drop17h75c103dc6ced4686E in host.o
ld: symbol(s) not found for architecture x86_64

[rtfeldman]

So now that #2430 is merged, you should be able to add -framework CoreAudio (following the same pattern of the -framework flags added in that PR) to the macOS linking, and see if that helps.

I'm on clang version 11.1.0; I'd try updating to that if possible too!

[ayazhafiz]

I rebased ignore_noncontribution_bevy_debugging on trunk and added 41d36bf. Linking with AudioUnit and CoreAudio seems to be enough:

    Finished dev [unoptimized + debuginfo] target(s) in 24.17s
     Running `target/debug/roc examples/hello-rust/Hello.roc`
🔨 Rebuilding host... Done!
hello world
Hello, World!

[JanCVanB]

Today, on my 2015 macbook:

• Hmm, how do I update clang?
• Hmm, how do I update Xcode?
• Hmm, why does the Xcode installer say there's not enough disk space?
• Hmm, why can't I clear 200GB of system data?
• Hmm, why did deleting Xcode manually break the updater?
• Hmm, why didn't anything tell me there was OS update?
• Hmm, why is the OS download stalled?

My prediction for tomorrow:

• Hmm, how do I remap the apple key in Manjaro?

[JanCVanB]

If 41d36bf does indeed get it working, should I PR that change into trunk?

[JanCVanB]

• Updated to macOS 12.2
• Updated to XCode 13.2.1
• Uninstalled & reinstalled Nix
• Successfully ran cargo run examples/hello-rust/Hello.roc on the first try
• Modified the example to use the commented-out sections with the breakout game
• Failed to run cargo run examples/hello-rust/Hello.roc due to errors about _IOHIDDeviceCopyMatchingElement, _IOHIDElementGetChildren, _IOHIDManagerClose, etc.
• Learned about the /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/ directory
• Added IOKit to compiler/build/src/link.rs
• Successfully ran the breakout game on the first try!!!

Thank you both so much! 😄 I'll PR the linkages now.