Pip installation failing with Python 3.7

[bmerry]

Describe the bug When running pip install pycuda on a fresh Python 3.7 virtual environment, the build fails (see log lower down). It works on Python 3.8.

To Reproduce Steps to reproduce the behavior:

1. Create a new Python 3.7 virtual environment with the latest packaging packages (I ran pyenv virtualenv --download -p /usr/bin/python3.7 env-3.7)
2. Switch to this virtual environment.
3. Run pip install pycuda

4. See error (there is a lot more compiler output, but this looks like the start of actual errors):

     src/wrapper/wrap_cudadrv.cpp: In function ‘void init_module__driver()’:
     src/wrapper/wrap_cudadrv.cpp:1034:26: error: ‘CU_TARGET_COMPUTE_20’ was not declared in this scope; did you mean ‘CU_TARGET_COMPUTE_90’?
      1034 |     .value("COMPUTE_20", CU_TARGET_COMPUTE_20)
           |                          ^~~~~~~~~~~~~~~~~~~~
           |                          CU_TARGET_COMPUTE_90
     src/wrapper/wrap_cudadrv.cpp:1037:26: error: ‘CU_TARGET_COMPUTE_21’ was not declared in this scope; did you mean ‘CU_TARGET_COMPUTE_61’?
      1037 |     .value("COMPUTE_21", CU_TARGET_COMPUTE_21)
           |                          ^~~~~~~~~~~~~~~~~~~~
           |                          CU_TARGET_COMPUTE_61
     /tmp/pip-build-env-b1oox89y/overlay/lib/python3.7/site-packages/setuptools/command/build_py.py:201: _Warning: Package 'pycuda.cuda' is absent from the `packages` configuration.
     !!
   
             ********************************************************************************
             ############################
             # Package would be ignored #
             ############################
             Python recognizes 'pycuda.cuda' as an importable package[^1],
             but it is absent from setuptools' `packages` configuration.
   
             This leads to an ambiguous overall configuration. If you want to distribute this
             package, please make sure that 'pycuda.cuda' is explicitly added
             to the `packages` configuration field.
   
             Alternatively, you can also rely on setuptools' discovery methods
             (for example by using `find_namespace_packages(...)`/`find_namespace:`
             instead of `find_packages(...)`/`find:`).
   
             You can read more about "package discovery" on setuptools documentation page:
   
             - https://setuptools.pypa.io/en/latest/userguide/package_discovery.html
   
             If you don't want 'pycuda.cuda' to be distributed and are
             already explicitly excluding 'pycuda.cuda' via
             `find_namespace_packages(...)/find_namespace` or `find_packages(...)/find`,
             you can try to use `exclude_package_data`, or `include-package-data=False` in
             combination with a more fine grained `package-data` configuration.
   
             You can read more about "package data files" on setuptools documentation page:
   
             - https://setuptools.pypa.io/en/latest/userguide/datafiles.html
   
             [^1]: For Python, any directory (with suitable naming) can be imported,
                   even if it does not contain any `.py` files.
                   On the other hand, currently there is no concept of package data
                   directory, all directories are treated like packages.
             ********************************************************************************
   
     !!
       check.warn(importable)
     error: command '/usr/bin/x86_64-linux-gnu-gcc' failed with exit code 1
     [end of output]
   
   note: This error originates from a subprocess, and is likely not a problem with pip.
   ERROR: Failed building wheel for pycuda
   Failed to build pycuda
   ERROR: Could not build wheels for pycuda, which is required to install pyproject.toml-based projects

Expected behavior Successful install.

Environment (please complete the following information):

• OS: Ubuntu 22.04, with Deadsnakes PPA for Python 3.7
• CUDA version: 12.0.1
• CUDA driver version: 525.105.17
• PyCUDA version: 2022.1
• Python version: 3.7.16

[inducer]

We're no longer supporting versions of Python before 3.8:

https://github.com/inducer/pycuda/blob/ad519613d8930dff319bf30c78c0fbf8bd9d424c/setup.py#L223

[bmerry]

Ah, that would explain it. Perhaps you could document that though? The changelogs at https://documen.tician.de/pycuda/misc.html stop at 2020, and the installation guide at https://wiki.tiker.net/PyCuda/Installation/Linux/ says the minimum version is Python 2.4.

[inducer]

https://pypi.org/project/pycuda/ shows this info.