Python 3.10 has deprecated "distutils" in favor of explicit use of
"setuptools" in :pep:`632`; SQLAlchemy's setup.py has replaced imports
accordingly. However, since setuptools itself only recently added the
replacement symbols mentioned in pep-632 as of November of 2022 in version
59.0.1, ``setup.py`` still has fallback imports to distutils, as SQLAlchemy
1.4 does not have a hard setuptools versioning requirement at this time.
SQLAlchemy 2.0 is expected to use a full :pep:`517` installation layout
which will indicate appropriate setuptools versioning up front.

Fixes: #7311
Change-Id: I215ef3c3b226a38266f59d181214aea462c4664d
(cherry picked from commit e6c02c33728a581e0df910caa8d96b6e114c114d)

* remove the c version of distill params since it's actually slower than
the python one
* add a function to langhelpers to check if the cextensions are active
* minor cleanup to the OrderedSet implementation

Change-Id: Iec3d0c3f0f42cdf51f802aaca342ba37b8783b85

* ensure on python 2 correct cflags to fail on undefined
symbols take effect

* fail for implicit function declaration

* python 2 does not publish PyDict_GetItemWithError but has
it as _PyDict_GetItemWIthError but only as of Python 2.7.12

Change-Id: I007509afddf7f44ca64e52fa9140be39f815fa7a

The ``importlib_metadata`` library is used to scan for setuptools
entrypoints rather than pkg_resources.   as importlib_metadata is a small
library that is included as of Python 3.8, the compatibility library is
installed as a dependency for Python versions older than 3.8.

Unfortunately setuptools "attr:" is broken because it tries to import
the module; seems like this is fixed as part of
https://github.com/pypa/setuptools/pull/1753 however this is too recent
to rely upon for now.

Added a new dialect token "mariadb" that may be used in place of "mysql" in
the :func:`_sa.create_engine` URL.  This will deliver a MariaDB dialect
subclass of the MySQLDialect in use that forces the "is_mariadb" flag to
True.  The dialect will raise an error if a server version string that does
not indicate MariaDB in use is received.   This is useful for
MariaDB-specific testing scenarios as well as to support applications that
are hardcoding to MariaDB-only concepts.  As MariaDB and MySQL featuresets
and usage patterns continue to diverge, this pattern may become more
prominent.

Fixes: #5400
Fixes: #5496
Change-Id: I330815ebe572b6a9818377da56621397335fa702

Installation has been modernized to use setup.cfg for most package
metadata.

Fixes: #5404
Change-Id: Id59c0c4e7f81eca89999d1f1f8b03c89835a09d1

Start trying to convert fundamental objects to
C as we now rely on a fairly small core of things,
and 1.4 is having problems with complexity added being
slower than the performance gains we are trying to build in.

immutabledict here does seem to bench as twice as fast as the
Python one, see below.  However, it does not appear to be
used prominently enough to make any dent in the performance
tests.

at the very least it may provide us some more lift-and-copy
code for more C extensions.

import timeit

from sqlalchemy.util._collections import not_immutabledict, immutabledict

def run(dict_cls):
    for i in range(1000000):
        d1 = dict_cls({"x": 5, "y": 4})

        d2 = d1.union({"x": 17, "new key": "some other value"}, None)

        assert list(d2) == ["x", "y", "new key"]

print(
    timeit.timeit(
        "run(d)", "from __main__ import run, not_immutabledict as d", number=1
    )
)
print(
    timeit.timeit(
        "run(d)", "from __main__ import run, immutabledict as d", number=1
    )
)

output:

python: 1.8799766399897635
C code: 0.8880784640205093

Change-Id: I29e7104dc21dcc7cdf895bf274003af2e219bf6d

Also remove no longer used compat code

Change-Id: Ifda239fd84b425e43f4028cb55a5b3b8efa4dfc6

- Fix typo in resultproxy.c that would error on windows.
- add -Wundef to C flags when linux is detected so that undefined
symbols emit a warning
- a few adjustments for tests to succeed on python 3.5
- note minimum version still documented here as 3.4 but this should
move to at least 3.5 if not 3.6 for SQLAlchemy 1.4

Change-Id: Ia93ee1cb5c52e51e72eb0a24c100421c5157d04b

Fixes: #5113

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### Description
Add py3.8 and py3.9 tokens to setup.py

### Checklist
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This pull request is:

- [ ] A documentation / typographical error fix
	- Good to go, no issue or tests are needed
- [x] A short code fix
	- please include the issue number, and create an issue if none exists, which
	  must include a complete example of the issue.  one line code fixes without an
	  issue and demonstration will not be accepted.
	- Please include: `Fixes: #<issue number>` in the commit message
	- please include tests.   one line code fixes without tests will not be accepted.
- [ ] A new feature implementation
	- please include the issue number, and create an issue if none exists, which must
	  include a complete example of how the feature would look.
	- Please include: `Fixes: #<issue number>` in the commit message
	- please include tests.

**Have a nice day!**

Closes: #5115
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/5115
Pull-request-sha: 5ae662f1ec0d89a16a03fe60d6f12712d0d21398

Change-Id: I1313df9bd117b1356c1d06d588e8e04a07ba4e39

The C extensions have been broken since cc718cccc0bf8a01abdf4068c
however CI did not find this, because the build degraded to
non-C extensions without failing.   Ensure that if cext is set,
there is no fallback to non-cext build if the C extension build
fails.

Repair C related issues introduced in cc718cccc0bf8a01abdf4068c.

As C extensions have been silently failing on 2.7 for some commits,
the callcounts also needed to be adjusted for recent performance-related
changes.  That in turn required a fix to the profiling decorator
to use signature rewriting in order to support py.test's
fixture mechanism under Python 2, usage introduced under profiling
in 89bf6d80a9.

Fixes: #5076
Change-Id: Id968f10c85d6bf489298b1c318a1f869ad3e7d80