Issue building from source on ARM Mac

[spencerdearman]

Describe the bug

The primary issue that I am having is that the qsharp package is failing to build on the last step due to a MacOS platform issue.

To Reproduce

Run ./build.py in the root directory as if you were just going to build the package and the error should present itself.

Expected behavior

The package should complete building, but instead I receive this error.

98 files are correctly formatted. build.py: Finished in 12.408s. build.py: Building the command line compiler Compiling qsharp v0.0.0 (/Users/spencerdearman/qsharp/pip) error: linking withcc` failed: exit status: 1 ... ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

error: could not compile qsharp (lib) due to 1 previous error Traceback (most recent call last): File "/Users/spencerdearman/qsharp/./build.py", line 221, in subprocess.run(cargo_build_args, check=True, text=True, cwd=root_dir) File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/subprocess.py", line 571, in run raise CalledProcessError(retcode, process.args, subprocess.CalledProcessError: Command '['cargo', 'build', '--release']' returned non-zero exit status 101. `

System information

Operating System: ARM64 Chip: M3 Max MacOS: Sonoma 14.4.1 Python Version: python 3.11.9 Package Version: The default when the repo is downloaded

[nirajvenkat]

I was able to make some kludgy fixes to get this working in the short term: 50a20bc38eac7d6dddc182f06dbbff6b6d414fac

[idavis]

@nirajvenkat Do you have both the aarch64 and x86_64 rust toolchains installed? Can you try running:

rustup target add x86_64-apple-darwin
rustup target add aarch64-apple-darwin

And then run the build again?

[spencerdearman]

I had to run rustup target add x86_64-apple-darwin to get it to work on my device but it was able to build after doing so.

[billti]

Interesting that the error was 'ld: symbol(s) not found for architecture arm64' but adding the x64 target fixed it :-/

I'm guessing as we build universal wheels on the mac by default (see https://github.com/microsoft/qsharp/blob/main/build.py#L240), if you build that on Mac (which build.py does by default) then you need both x64 and arm64 targets installed in your Rust toolchain. Maybe our README should include that tidbit.

[idavis]

I created #1649 to address this and guide users to a working build.

[nirajvenkat]

@idavis Thanks this helps with the full ./build.py. These changes (https://github.com/microsoft/qsharp/commit/50a20bc38eac7d6dddc182f06dbbff6b6d414) are still required though. My rustup target list --installed now shows:

aarch64-apple-darwin
wasm32-unknown-unknown
x86_64-apple-darwin

Earlier I was only doing ./build.py --wasm --npm --vscode so the lack of x86_64 toolchain was not affecting me.

[idavis]

@nirajvenkat What version of rust are you using? This build works fine for me without any source changes with 1.78.

[nirajvenkat]

@idavis rustc 1.79.0 (129f3b996 2024-06-10)

[idavis]

@nirajvenkat #1649 should have fixed your issues. Please reopen if you have any more problems. Thank you!