gh-139314: Add support for linking against zlib-rs and libbzip2-rs

Doc/using/configure.rst

@@ -71,7 +71,8 @@ Dependencies to build optional modules are:
    * - Dependency
      - Minimum version
      - Python module
-   * - `libbz2 <https://sourceware.org/bzip2/>`_
+   * - `libbz2 <https://sourceware.org/bzip2/>`_ or
+       `libbzip2-rs <https://github.com/trifectatechfoundation/libbzip2-rs>`_ [1]_
      -
      - :mod:`bz2`
    * - `libffi <https://sourceware.org/libffi/>`_
@@ -82,47 +83,54 @@ Dependencies to build optional modules are:
      - :mod:`lzma`
    * - `libmpdec <https://www.bytereef.org/mpdecimal/doc/libmpdec/>`_
      - 2.5.0
-     - :mod:`decimal` [1]_
+     - :mod:`decimal` [2]_
    * - `libreadline <https://tiswww.case.edu/php/chet/readline/rltop.html>`_ or
-       `libedit <https://www.thrysoee.dk/editline/>`_ [2]_
+       `libedit <https://www.thrysoee.dk/editline/>`_ [3]_
      -
      - :mod:`readline`
    * - `libuuid <https://linux.die.net/man/3/libuuid>`_
      -
-     - ``_uuid`` [3]_
-   * - `ncurses <https://gnu.org/software/ncurses/ncurses.html>`_ [4]_
+     - ``_uuid`` [4]_
+   * - `ncurses <https://gnu.org/software/ncurses/ncurses.html>`_ [5]_
      -
      - :mod:`curses`
    * - `OpenSSL <https://openssl-library.org/>`_
      - | 3.0.18 recommended
        | (1.1.1 minimum)
-     - :mod:`ssl`, :mod:`hashlib` [5]_
+     - :mod:`ssl`, :mod:`hashlib` [6]_
    * - `SQLite <https://sqlite.org/>`_
      - 3.15.2
      - :mod:`sqlite3`
    * - `Tcl/Tk <https://www.tcl-lang.org/>`_
      - 8.5.12
      - :mod:`tkinter`, :ref:`IDLE <idle>`, :mod:`turtle`
-   * - `zlib <https://www.zlib.net>`_
-     - 1.2.2.1
+   * - `zlib <https://www.zlib.net>`_,
+       `zlib-ng <https://github.com/zlib-ng/zlib-ng>`_, or
+       `zlib-rs <https://github.com/trifectatechfoundation/zlib-rs/>`_ [7]_
+     - | 1.2.2.1 (zlib, zlib-ng)
+       | 0.6.0 (zlib-rs)
      - :mod:`zlib`, :mod:`gzip`, :mod:`ensurepip`
    * - `zstd <https://facebook.github.io/zstd/>`_
      - 1.4.5
      - :mod:`compression.zstd`
 
-.. [1] If *libmpdec* is not available, the :mod:`decimal` module will use
+.. [1] See :option:`--with-bzip2` for choosing the backend for the
+   :mod:`bz2` module.
+.. [2] If *libmpdec* is not available, the :mod:`decimal` module will use
    a pure-Python implementation.
-.. [2] See :option:`--with-readline` for choosing the backend for the
+.. [3] See :option:`--with-readline` for choosing the backend for the
    :mod:`readline` module.
-.. [3] The :mod:`uuid` module uses ``_uuid`` to generate "safe" UUIDs.
+.. [4] The :mod:`uuid` module uses ``_uuid`` to generate "safe" UUIDs.
    See the module documentation for details.
-.. [4] The :mod:`curses` module requires the ``libncurses`` or ``libncursesw``
+.. [5] The :mod:`curses` module requires the ``libncurses`` or ``libncursesw``
    library.
    The :mod:`curses.panel` module additionally requires the ``libpanel`` or
    ``libpanelw`` library.
-.. [5] If OpenSSL is not available, the :mod:`hashlib` module will use
+.. [6] If OpenSSL is not available, the :mod:`hashlib` module will use
    bundled implementations of several hash functions.
    See :option:`--with-builtin-hashlib-hashes` for *forcing* usage of OpenSSL.
+.. [7] See :option:`--with-zlib` for choosing the backend for the
+   :mod:`zlib` module.
 
 Note that the table does not include all optional modules; in particular,
 platform-specific modules like :mod:`winreg` are not listed here.
@@ -1113,6 +1121,54 @@ Libraries options
 
    .. versionadded:: next
 
+.. option:: --with-zlib=zlib|zlib-ng|zlib-rs
+
+   Designate the zlib implementation to build the :mod:`zlib` module against.
+
+   * ``zlib``: Use the system zlib library, found via ``pkg-config`` or as
+     ``libz``.
+   * ``zlib-ng``: Same detection as ``zlib``, but fail unless the detected
+     library is `zlib-ng <https://github.com/zlib-ng/zlib-ng>`__.
+   * ``zlib-rs``: Use `zlib-rs
+     <https://github.com/trifectatechfoundation/zlib-rs/>`__, found via
+     ``pkg-config`` as ``libz_rs``.
+
+   Without this option (or with ``--with-zlib=auto``, the default), the system
+   zlib is used when found; configure only fails when an implementation was
+   requested explicitly but cannot be found.
+
+   .. versionadded:: next
+
+.. option:: --without-zlib
+
+   Don't build the :mod:`zlib` module, even when a zlib library is present
+   (built by default when one is found).
+
+   .. versionadded:: next
+
+.. option:: --with-bzip2=bzip2|bzip2-rs
+
+   Designate the bzip2 implementation to build the :mod:`bz2` module against.
+
+   * ``bzip2``: Use the system bzip2 library, found via ``pkg-config`` or as
+     ``libbz2``.
+   * ``bzip2-rs``: Use `libbzip2-rs
+     <https://github.com/trifectatechfoundation/libbzip2-rs>`__, found via
+     ``pkg-config`` as ``libbz2_rs``.
+
+   Without this option (or with ``--with-bzip2=auto``, the default), the
+   system bzip2 is used when found; configure only fails when an
+   implementation was requested explicitly but cannot be found.
+
+   .. versionadded:: next
+
+.. option:: --without-bzip2
+
+   Don't build the :mod:`bz2` module, even when a bzip2 library is present
+   (built by default when one is found).
+
+   .. versionadded:: next
+
 .. option:: --with-libm=STRING
 
    Override ``libm`` math library to *STRING* (default is system-dependent).

Doc/whatsnew/3.16.rst

@@ -823,6 +823,18 @@ Build changes
 
   (Contributed by Serhiy Storchaka in :gh:`136687`.)
 
+* Add the :option:`--with-zlib` and :option:`--with-bzip2` :program:`configure`
+  options to select the zlib and bzip2 implementations used to build the
+  :mod:`zlib` and :mod:`bz2` modules. In addition to the default system
+  libraries, they can build against `zlib-rs
+  <https://github.com/trifectatechfoundation/zlib-rs/>`__ and `libbzip2-rs
+  <https://github.com/trifectatechfoundation/libbzip2-rs>`__, and
+  ``--with-zlib=zlib-ng`` verifies that the detected zlib is `zlib-ng
+  <https://github.com/zlib-ng/zlib-ng>`__. :option:`--without-zlib` and
+  :option:`--without-bzip2` exclude the modules from the build.
+
+  (Contributed by Stan Ulbrych in :gh:`139314`.)
+
 
 C API changes
 =============

Misc/NEWS.d/next/Build/2025-09-25-01-33-12.gh-issue-139314._m9BUl.rst

@@ -0,0 +1,9 @@
+Add the :option:`--with-zlib` and :option:`--with-bzip2` :program:`configure`
+options to select the zlib and bzip2 implementations used to build the
+:mod:`zlib` and :mod:`bz2` modules. In addition to the default system
+libraries, they can build against `zlib-rs
+<https://github.com/trifectatechfoundation/zlib-rs/>`__ and `libbzip2-rs
+<https://github.com/trifectatechfoundation/libbzip2-rs>`__, and
+``--with-zlib=zlib-ng`` verifies that the detected zlib is `zlib-ng
+<https://github.com/zlib-ng/zlib-ng>`__. :option:`--without-zlib` and
+:option:`--without-bzip2` exclude the modules from the build.