manylinux_2_28-cross:x86_64 : ssl module in Python is not available

[makslevental]

Sorry if I've misunderstood the discussion @ pypa/cibuildwheel#598 but I can't get this to work with cibuildwheel:

# pyproject.toml

[tool.cibuildwheel.linux]
archs = ["x86_64", "aarch64"]
manylinux-x86_64-image = "messense/manylinux_2_28-cross:x86_64"
...

produces

$ cibuildwheel --platform linux

  Installing build dependencies: started
  Running command pip subprocess to install build dependencies
  Using pip 22.3.1 from /opt/_internal/cpython-3.10.8/lib/python3.10/site-packages/pip (python 3.10)
  WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
  WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/setuptools/
  WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/setuptools/
  WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/setuptools/
  WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/setuptools/
  WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/setuptools/
  Could not fetch URL https://pypi.org/simple/setuptools/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/setuptools/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping
  ERROR: Could not find a version that satisfies the requirement setuptools>=42 (from versions: none)
  ERROR: No matching distribution found for setuptools>=42
  error: subprocess-exited-with-error

Currently investigating whether manylinux2014 works...

[messense]

cibuildwheel doesn't support this right now, /opt/_internal/cpython-* is target Python which wasn't compiled with SSL support.

What you are doing now is basically using QEMU to run them (except that you are targeting x86_64 on x86_64 so QEMU isn't required).

See also https://crossenv.readthedocs.io/en/latest/quickstart.html