Gevent cant be installed on M1 mac using poetry

Question

I tried to install many dependencies for a virtual environment using poetry. When it gets to gevent (20.9.0) it gets the following

import error:

ImportError: dlopen(/private/var/folders/21/wxg5bdsj1w3f3j_9sl_pktbw0000gn/T/pip-build-env-50mwte36/overlay/lib/python3.8/site-packages/_cffi_backend.cpython-38-darwin.so,
0x0002): tried:
'/private/var/folders/21/wxg5bdsj1w3f3j_9sl_pktbw0000gn/T/pip-build-env-50mwte36/overlay/lib/python3.8/site-packages/_cffi_backend.cpython-38-darwin.so'
(mach-o file, but is an incompatible architecture (have 'x86_64', need 'arm64e')), '/usr/local/lib/_cffi_backend.cpython-38-darwin.so' (no such file), '/usr/lib/_cffi_backend.cpython-38-darwin.so' (no such file)

I've tried to use pip3 instead, but still had the same problem.

Answer 1

I've have this problem with other libraries also and this solution worked some times:

sudo arch -arm64 <poetry or pip> install <lib to istall>

Using arch -arm64 allowed me to install the rigt wheel for the M1 processor

Answer 2

The M1 needs either all x86 code or all arm64 code in a process. This issue is caused by a program attempting to load an x86_64-only library from a native arm64 process. This unfortunately can't be done (See here).

With specific regard to gevent, the project page here includes the following information:

Beginning with gevent 20.12.0, 64-bit ARM binaries are distributed on PyPI for aarch64 manylinux2014 compatible systems. Installing these needs a very recent version of pip. These wheels do not contain the c-ares resolver, are not tested, and are built with very low levels of optimizations. Serious production users of gevent on 64-bit ARM systems are encouraged to build their own binary wheels.

I'm not sure if arm64 is exclusively supported on Linux, but in any case, I would suggest updating your versions of both gevent and pip to the lastest possible versions.