zlib dependency is not optional to build Python? #139823
Description
Bug report
Bug description:
Compilation without zlib worked fine, but installation fails with ModuleNotFoundError: No module named 'zlib'.
So is this dependency not actually optional?
# make -j8
./python -E ../Tools/build/generate-build-details.py `cat pybuilddir.txt`/build-details.json
The following modules are *disabled* in configure script:
_sqlite3
The necessary bits to build these optional modules were not found:
_bz2 _ctypes _ctypes_test
_curses _curses_panel _dbm
_gdbm _lzma _tkinter
_uuid _zstd readline
zlib
To find the necessary bits, look in configure.ac and config.log.Installation:
# make install
(cd /python-install/share/man/man1; ln -s python3.14.1 python3.1)
if test "xupgrade" != "xno" ; then \
case upgrade in \
upgrade) ensurepip="--upgrade" ;; \
install|*) ensurepip="" ;; \
esac; \
./python -E -m ensurepip \
$ensurepip --root=/ ; \
fi
Traceback (most recent call last):
File "<frozen zipimport>", line 620, in _get_decompress_func
ModuleNotFoundError: No module named 'zlib'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<frozen zipimport>", line 668, in _get_data
File "<frozen zipimport>", line 623, in _get_decompress_func
zipimport.ZipImportError: can't decompress data; zlib not available
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<string>", line 6, in <module>
runpy.run_module("pip", run_name="__main__", alter_sys=True)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<frozen runpy>", line 222, in run_module
File "<frozen runpy>", line 148, in _get_module_details
File "<frozen runpy>", line 112, in _get_module_details
File "<frozen zipimport>", line 136, in get_code
File "<frozen zipimport>", line 802, in _get_module_code
File "<frozen zipimport>", line 670, in _get_data
zipimport.ZipImportError: can't decompress data; zlib not available
Traceback (most recent call last):
File "<frozen runpy>", line 198, in _run_module_as_main
File "<frozen runpy>", line 88, in _run_code
File "/Python-3.14.0/Lib/ensurepip/__main__.py", line 5, in <module>
sys.exit(ensurepip._main())
~~~~~~~~~~~~~~~^^
File "/Python-3.14.0/Lib/ensurepip/__init__.py", line 257, in _main
return _bootstrap(
root=args.root,
...<4 lines>...
default_pip=args.default_pip,
)
File "/Python-3.14.0/Lib/ensurepip/__init__.py", line 172, in _bootstrap
return _run_pip([*args, "pip"], [os.fsdecode(tmp_wheel_path)])
File "/Python-3.14.0/Lib/ensurepip/__init__.py", line 87, in _run_pip
return subprocess.run(cmd, check=True).returncode
~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
File "/Python-3.14.0/Lib/subprocess.py", line 577, in run
raise CalledProcessError(retcode, process.args,
output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['/Python-3.14.0/build/python', '-W', 'ignore::DeprecationWarning', '-c', '\nimport runpy\nimport sys\nsys.path = [\'/tmp/tmpe4cza5y6/pip-25.2-py3-none-any.whl\'] + sys.path\nsys.argv[1:] = [\'install\', \'--no-cache-dir\', \'--no-index\', \'--find-links\', \'/tmp/tmpe4cza5y6\', \'--root\', \'/\', \'--upgrade\', \'pip\']\nrunpy.run_module("pip", run_name="__main__", alter_sys=True)\n']' returned non-zero exit status 1.
make: *** [Makefile:2496: install] Error 1
CPython versions tested on:
3.14
Operating systems tested on:
Linux