Maturin compiled Python CLI tool expecting x86 library on arm64 M1 Mac

[iskandr]

I'm struggling to get my first Maturin project working, for some reason it expects an x86 compiled library on my M1 mac even though the build process is correctly targeting arm64.

Here's the ultimate error:

$ yolotrim
Traceback (most recent call last):
  File "/Users/iskander/miniconda3/bin/yolotrim", line 5, in <module>
    from yolotrim import cli
  File "/Users/iskander/miniconda3/lib/python3.10/site-packages/yolotrim/__init__.py", line 1, in <module>
    from .yolotrim import *
ImportError: dlopen(/Users/iskander/miniconda3/lib/python3.10/site-packages/yolotrim/yolotrim.cpython-310-darwin.so, 0x0002): tried: '/Users/iskander/miniconda3/lib/python3.10/site-packages/yolotrim/yolotrim.cpython-310-darwin.so' (mach-o file, but is an incompatible architecture (have 'arm64', need 'x86_64')), '/usr/local/lib/yolotrim.cpython-310-darwin.so' (no such file), '/usr/lib/yolotrim.cpython-310-darwin.so' (no such file)

Here's the output of rustup show:

 rustup show
Default host: aarch64-apple-darwin
rustup home:  /Users/iskander/.rustup

installed targets for active toolchain
--------------------------------------

aarch64-apple-darwin
x86_64-apple-darwin

active toolchain
----------------

stable-aarch64-apple-darwin (default)
rustc 1.65.0 (897e37553 2022-11-02)

And here's the output of maturin build:

 maturin build
📦 Including license file "/Users/iskander/code/yolotrim/LICENSE"
🔗 Found pyo3 bindings
🐍 Found CPython 3.10 at /Users/iskander/miniconda3/bin/python3
📡 Using build options features from pyproject.toml
💻 Using `MACOSX_DEPLOYMENT_TARGET=11.0` for aarch64-apple-darwin by default
   Compiling target-lexicon v0.12.6
   Compiling autocfg v1.1.0
   Compiling once_cell v1.17.1
   Compiling proc-macro2 v1.0.56
   Compiling libc v0.2.141
   Compiling unicode-ident v1.0.8
   Compiling quote v1.0.26
   Compiling syn v1.0.109
   Compiling parking_lot_core v0.9.7
   Compiling scopeguard v1.1.0
   Compiling smallvec v1.10.0
   Compiling cfg-if v1.0.0
   Compiling unindent v0.1.11
   Compiling indoc v1.0.9
   Compiling lock_api v0.4.9
   Compiling memoffset v0.8.0
   Compiling pyo3-build-config v0.18.2
   Compiling parking_lot v0.12.1
   Compiling pyo3-ffi v0.18.2
   Compiling pyo3 v0.18.2
   Compiling pyo3-macros-backend v0.18.2
   Compiling pyo3-macros v0.18.2
   Compiling yolotrim v0.1.0 (/Users/iskander/code/yolotrim)
    Finished dev [unoptimized + debuginfo] target(s) in 6.02s
📦 Built wheel for CPython 3.10 to /Users/iskander/code/yolotrim/target/wheels/yolotrim-0.1.0-cp310-cp310-macosx_11_0_arm64.whl

Any ideas for how to figure out why the wrong architecture ends up expected at runtime?

[iskandr]

Ah, I just realized my Python interpreter is an x86 binary!

$ file `which python`
/Users/iskander/miniconda3/bin/python: Mach-O 64-bit executable x86_64