macOS Big Sur 11.0.1 build failure

[ootoovak]

This crate does not build on macOS Big Sur 11.0.1 right now. I've tried both the latest version as well as the master branch as of today. I am having a read of the build file to see if I can tweak anything to get it working myself.

[ootoovak]

First issue is there is a problem finding llvm-config but explicitly defining it's location with an environment variable helps it along LLVM_CONFIG_PATH=/usr/local/opt/llvm/bin/llvm-config cargo build.

But it then gets stuck on the current macOS version error: invalid version number in '-mmacosx-version-min=11.0' but as far as I can tell from the code that likely comes from bindgen so I imagine the fix will need to happen there first.

[MichaelHills]

I haven't upgraded to Big Sur yet, but might be helpful to post the full error log? Did you install latest Xcode and command line tools? At a guess, it sounds like your version of clang doesn't know about version 11.0? What version of Xcode/clang are you running?

[ootoovak]

Yeah, installed the latest Xcode and CLI using sudo xcode-select --install.

Clang version is:

Apple clang version 12.0.0 (clang-1200.0.32.27)
Target: x86_64-apple-darwin20.1.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

Build error:

Caused by:
  process didn't exit successfully: `./coreaudio-sys/target/debug/build/coreaudio-sys-f0151f718cd0f5f4/build-script-build` (exit code: 101)
  --- stdout
  cargo:rerun-if-env-changed=COREAUDIO_SDK_PATH
  cargo:rustc-link-lib=framework=AudioToolbox
  cargo:rustc-link-lib=framework=AudioToolbox
  cargo:rustc-link-lib=framework=CoreAudio
  cargo:rustc-link-lib=framework=OpenAL
  cargo:rustc-link-lib=framework=CoreMIDI
  cargo:rerun-if-env-changed=BINDGEN_EXTRA_CLANG_ARGS

  --- stderr
  error: invalid version number in '-mmacosx-version-min=11.0', err: true
  thread 'main' panicked at 'unable to generate bindings: ()', build.rs:124:39
  stack backtrace:
     0: rust_begin_unwind
               at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/std/src/panicking.rs:475
     1: core::panicking::panic_fmt
               at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/panicking.rs:85
     2: core::option::expect_none_failed
               at /rustc/18bf6b4f01a6feaf7259ba7cdae58031af1b7b39/library/core/src/option.rs:1221
     3: core::result::Result<T,E>::expect
               at ~/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/src/rust/library/core/src/result.rs:933
     4: build_script_build::build
               at ./build.rs:124
     5: build_script_build::main
               at ./build.rs:139
     6: core::ops::function::FnOnce::call_once
               at ~/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/src/rust/library/core/src/ops/function.rs:227

[MichaelHills]

Hm, do you know if it's easy to get bindgen to log the clang command it's trying to run? Apparently Big Sur is bricking late 2013 MBPs (though maybe just 13" and I have 15") so I'm holding off on upgrading for the moment just in case...

[ootoovak]

No, I'm not sure but I'll try look through the bindgen docs/code at some point to see if I can figure that out.

For what it is worth I'm on a Late 2013 15" MBP, and thankfully there was no issues. I totally get holding off though and would as well if I knew there was a chance of bricking! 😬

[ootoovak]

Updating the clang-sys in rust-bindgen seems to fix the issue. I've submitted a Pull Request for the update and once that is merged in and released I'll create a Pull Request here for the rust-bindgen dependency update as well.

[ootoovak]

https://github.com/rust-lang/rust-bindgen/pull/1923

[ootoovak]

The Bindgen changes have been merged in so I've now submitted a PR for this project: https://github.com/RustAudio/coreaudio-sys/pull/43

[MichaelHills]

Fixed by https://github.com/RustAudio/coreaudio-sys/pull/43