gh-138850: Add --disable-epoll to configure

[mtelka]

Fixes #138850

• Issue: configure option for epoll disable #138850

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[encukou]

Looks good! Could you also add docs to https://docs.python.org/3/using/configure.html (maybe a new System Options?) and to https://docs.python.org/3/library/select.html#select.epoll?

Or let me know if you want me to do that.

[mtelka]

@encukou I'd really appreciate if you'll do that. Thank you.

[vstinner]

@mtelka: Would it make sense to detect illumos in configure and disable epoll support on this OS?

[mtelka]

@mtelka: Would it make sense to detect illumos in configure and disable epoll support on this OS?

Yes, it would. However I'm not sure it is worth doing.

[vstinner]

I tested the change on Linux:

$ ./configure --disable-epoll && make
$ ./python
>>> import select
>>> select.epoll
Traceback (most recent call last):
  File "<python-input-1>", line 1, in <module>
    select.epoll
AttributeError: module 'select' has no attribute 'epoll'. Did you mean '.poll' instead of '.epoll'?

It works as expected :-)

[vstinner]

LGTM.