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gh-85454: Remove distutils.ccompiler from Tools/c-analyzer by corona10 · Pull Request #95171 · python/cpython · GitHub

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gh-85454: Remove distutils.ccompiler from Tools/c-analyzer #95171

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Merged
tiran merged 1 commit into from
Jul 25, 2022
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gh-85454: Remove distutils.ccompiler from Tools/c-analyzer #95171

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14 changes: 12 additions & 2 deletions Tools/c-analyzer/c_parser/preprocessor/__init__.py
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Original file line number Diff line number Diff line change
@@ -1,7 +1,9 @@
import contextlib
import distutils.ccompiler
import logging
import os
import os.path
import re
import sys

from c_common.fsutil import match_glob as _match_glob
from c_common.tables import parse_table as _parse_table
Expand Down Expand Up @@ -168,9 +170,17 @@ def handling_errors(ignore_exc=None, *, log_err=None):
}


def _get_default_compiler():

corona10 Jul 23, 2022 •
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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Minimalized ported version from

cpython/Lib/distutils/ccompiler.py

Lines 937 to 956 in f4c0348

def get_default_compiler(osname=None, platform=None):
"""Determine the default compiler to use for the given platform.
osname should be one of the standard Python OS names (i.e. the
ones returned by os.name) and platform the common value
returned by sys.platform for the platform in question.
The default values are os.name and sys.platform in case the
parameters are not given.
"""
if osname is None:
osname = os.name
if platform is None:
platform = sys.platform
for pattern, compiler in _default_compilers:
if re.match(pattern, platform) is not None or \
re.match(pattern, osname) is not None:
return compiler
# Default to Unix compiler
return 'unix'

ericsnowcurrently Jul 25, 2022

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

It may be worth having a short comment indicating this was derived from the distutils code.
if re.match('cygwin.*', sys.platform) is not None:

kumaraditya303 Jul 23, 2022

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

You can just remove cygwin as it is unsupported.

corona10 Jul 23, 2022

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Are you sure?

corona10 Jul 24, 2022 •
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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

We have a bunch of Cygwin-related codes (__CYGWIN__) in CPython code base, Did we decide to remove them?
Even if PEP 11 defined tier-based platforms, I don't interpret them as removing all unsupported platform codes.

ericsnowcurrently Jul 25, 2022

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Cygwin is certainly still alive to some extent, so I'd say let's not worry about that in the PR.

kumaraditya303 Jul 25, 2022

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

If you remove cygwin branch, it will fallback to unix which is better than special casing it but it's minor and you can ignore this too.

corona10 Jul 26, 2022 •
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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

If you remove cygwin branch, it will fallback to unix which is better than special casing it but it's minor and you can ignore this too.

It's care about Windows/Cygwin case, see: https://docs.python.org/3/library/sys.html.
It can be gone to the wrong fallback logic.
return 'unix'
if os.name == 'nt':
return 'msvc'
return 'unix'


def _get_preprocessor(tool):
if tool is True:
tool = distutils.ccompiler.get_default_compiler()
tool = _get_default_compiler()
preprocess = _COMPILERS.get(tool)
if preprocess is None:
raise ValueError(f'unsupported tool {tool}')
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