diff --git a/Doc/using/configure.rst b/Doc/using/configure.rst
index fd20ff2cb89810..dbf070058e7552 100644
--- a/Doc/using/configure.rst
+++ b/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).
diff --git a/Doc/whatsnew/3.16.rst b/Doc/whatsnew/3.16.rst
index 6e69737768d5e1..a0ab20085f27be 100644
--- a/Doc/whatsnew/3.16.rst
+++ b/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
 =============
diff --git a/Misc/NEWS.d/next/Build/2025-09-25-01-33-12.gh-issue-139314._m9BUl.rst b/Misc/NEWS.d/next/Build/2025-09-25-01-33-12.gh-issue-139314._m9BUl.rst
new file mode 100644
index 00000000000000..afc78af0d28fc7
--- /dev/null
+++ b/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.
diff --git a/configure b/configure
index 836eb88e4cdb6e..e005b047eac099 100755
--- a/configure
+++ b/configure
@@ -1142,6 +1142,8 @@ with_c_locale_coercion
 with_valgrind
 with_dtrace
 enable_epoll
+with_zlib
+with_bzip2
 with_libm
 with_libc
 enable_big_digits
@@ -1964,6 +1966,12 @@ Optional Packages:
                           (default is yes)
   --with-valgrind         enable Valgrind support (default is no)
   --with-dtrace           enable DTrace support (default is no)
+  --with(out)-zlib[=zlib|zlib-ng|zlib-rs|no]
+                          select the zlib implementation to link against, or
+                          disable zlib support (default: auto)
+  --with(out)-bzip2[=bzip2|bzip2-rs|no]
+                          select the bzip2 implementation to link against, or
+                          disable bzip2 support (default: auto)
   --with-libm=STRING      override libm math library to STRING (default is
                           system-dependent)
   --with-libc=STRING      override libc C library to STRING (default is
@@ -22805,6 +22813,30 @@ fi
 
 
 
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for --with-zlib" >&5
+printf %s "checking for --with-zlib... " >&6; }
+
+# Check whether --with-zlib was given.
+if test ${with_zlib+y}
+then :
+  withval=$with_zlib; case $with_zlib in #(
+  yes|auto) :
+    with_zlib=auto ;; #(
+  zlib|zlib-ng|zlib-rs|no) :
+     ;; #(
+  *) :
+    as_fn_error $? "proper usage is --with(out)-zlib[=zlib|zlib-ng|zlib-rs|no]" "$LINENO" 5 ;;
+esac
+else case e in #(
+  e) with_zlib=auto ;;
+esac
+fi
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $with_zlib" >&5
+printf "%s\n" "$with_zlib" >&6; }
+
+case $with_zlib in #(
+  auto|zlib) :
 
 
 
@@ -22817,23 +22849,47 @@ then :
 fi
 
 
+ ;; #(
+  *) :
+     ;;
+esac
+
+if test "x$with_zlib" = xzlib-rs
+then :
+
+  zlib_name="libz_rs"
+  zlib_version="0.6.0"
+  zlib_libname="z_rs"
 
+else case e in #(
+  e)
+  zlib_name="zlib"
+  zlib_version="1.2.2.1"
+  zlib_libname="z"
+ ;;
+esac
+fi
 
+if test "x$with_zlib" = xno
+then :
+  have_zlib=no
+else case e in #(
+  e)
 
 pkg_failed=no
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for zlib >= 1.2.2.1" >&5
-printf %s "checking for zlib >= 1.2.2.1... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $zlib_name >= $zlib_version" >&5
+printf %s "checking for $zlib_name >= $zlib_version... " >&6; }
 
 if test -n "$ZLIB_CFLAGS"; then
     pkg_cv_ZLIB_CFLAGS="$ZLIB_CFLAGS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"zlib >= 1.2.2.1\""; } >&5
-  ($PKG_CONFIG --exists --print-errors "zlib >= 1.2.2.1") 2>&5
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"\$zlib_name >= \$zlib_version\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "$zlib_name >= $zlib_version") 2>&5
   ac_status=$?
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
-  pkg_cv_ZLIB_CFLAGS=`$PKG_CONFIG --cflags "zlib >= 1.2.2.1" 2>/dev/null`
+  pkg_cv_ZLIB_CFLAGS=`$PKG_CONFIG --cflags "$zlib_name >= $zlib_version" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
 else
   pkg_failed=yes
@@ -22845,12 +22901,12 @@ if test -n "$ZLIB_LIBS"; then
     pkg_cv_ZLIB_LIBS="$ZLIB_LIBS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"zlib >= 1.2.2.1\""; } >&5
-  ($PKG_CONFIG --exists --print-errors "zlib >= 1.2.2.1") 2>&5
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"\$zlib_name >= \$zlib_version\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "$zlib_name >= $zlib_version") 2>&5
   ac_status=$?
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
-  pkg_cv_ZLIB_LIBS=`$PKG_CONFIG --libs "zlib >= 1.2.2.1" 2>/dev/null`
+  pkg_cv_ZLIB_LIBS=`$PKG_CONFIG --libs "$zlib_name >= $zlib_version" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
 else
   pkg_failed=yes
@@ -22871,9 +22927,9 @@ else
         _pkg_short_errors_supported=no
 fi
         if test $_pkg_short_errors_supported = yes; then
-                ZLIB_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "zlib >= 1.2.2.1" 2>&1`
+                ZLIB_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "$zlib_name >= $zlib_version" 2>&1`
         else
-                ZLIB_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "zlib >= 1.2.2.1" 2>&1`
+                ZLIB_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "$zlib_name >= $zlib_version" 2>&1`
         fi
         # Put the nasty error message in config.log where it belongs
         echo "$ZLIB_PKG_ERRORS" >&5
@@ -22895,14 +22951,15 @@ then :
   printf "%s\n" "#define HAVE_ZLIB_H 1" >>confdefs.h
 
       py_check_lib_save_LIBS=$LIBS
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for gzread in -lz" >&5
-printf %s "checking for gzread in -lz... " >&6; }
-if test ${ac_cv_lib_z_gzread+y}
+as_ac_Lib=`printf "%s\n" "ac_cv_lib_$zlib_libname""_gzread" | sed "$as_sed_sh"`
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for gzread in -l$zlib_libname" >&5
+printf %s "checking for gzread in -l$zlib_libname... " >&6; }
+if eval test \${$as_ac_Lib+y}
 then :
   printf %s "(cached) " >&6
 else case e in #(
   e) ac_check_lib_save_LIBS=$LIBS
-LIBS="-lz  $LIBS"
+LIBS="-l$zlib_libname  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -22926,9 +22983,9 @@ return gzread ();
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
-  ac_cv_lib_z_gzread=yes
+  eval "$as_ac_Lib=yes"
 else case e in #(
-  e) ac_cv_lib_z_gzread=no ;;
+  e) eval "$as_ac_Lib=no" ;;
 esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
@@ -22936,9 +22993,10 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
 LIBS=$ac_check_lib_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_z_gzread" >&5
-printf "%s\n" "$ac_cv_lib_z_gzread" >&6; }
-if test "x$ac_cv_lib_z_gzread" = xyes
+eval ac_res=\$$as_ac_Lib
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+if eval test \"x\$"$as_ac_Lib"\" = x"yes"
 then :
   have_zlib=yes
 else case e in #(
@@ -22959,16 +23017,17 @@ done
 then :
 
       ZLIB_CFLAGS=${ZLIB_CFLAGS-""}
-      ZLIB_LIBS=${ZLIB_LIBS-"-lz"}
+      ZLIB_LIBS=${ZLIB_LIBS-"-l$zlib_libname"}
       py_check_lib_save_LIBS=$LIBS
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for inflateCopy in -lz" >&5
-printf %s "checking for inflateCopy in -lz... " >&6; }
-if test ${ac_cv_lib_z_inflateCopy+y}
+as_ac_Lib=`printf "%s\n" "ac_cv_lib_$zlib_libname""_inflateCopy" | sed "$as_sed_sh"`
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for inflateCopy in -l$zlib_libname" >&5
+printf %s "checking for inflateCopy in -l$zlib_libname... " >&6; }
+if eval test \${$as_ac_Lib+y}
 then :
   printf %s "(cached) " >&6
 else case e in #(
   e) ac_check_lib_save_LIBS=$LIBS
-LIBS="-lz  $LIBS"
+LIBS="-l$zlib_libname  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -22992,9 +23051,9 @@ return inflateCopy ();
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
-  ac_cv_lib_z_inflateCopy=yes
+  eval "$as_ac_Lib=yes"
 else case e in #(
-  e) ac_cv_lib_z_inflateCopy=no ;;
+  e) eval "$as_ac_Lib=no" ;;
 esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
@@ -23002,9 +23061,10 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
 LIBS=$ac_check_lib_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_z_inflateCopy" >&5
-printf "%s\n" "$ac_cv_lib_z_inflateCopy" >&6; }
-if test "x$ac_cv_lib_z_inflateCopy" = xyes
+eval ac_res=\$$as_ac_Lib
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+if eval test \"x\$"$as_ac_Lib"\" = x"yes"
 then :
   printf "%s\n" "#define HAVE_ZLIB_COPY 1" >>confdefs.h
 
@@ -23042,14 +23102,15 @@ then :
   printf "%s\n" "#define HAVE_ZLIB_H 1" >>confdefs.h
 
       py_check_lib_save_LIBS=$LIBS
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for gzread in -lz" >&5
-printf %s "checking for gzread in -lz... " >&6; }
-if test ${ac_cv_lib_z_gzread+y}
+as_ac_Lib=`printf "%s\n" "ac_cv_lib_$zlib_libname""_gzread" | sed "$as_sed_sh"`
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for gzread in -l$zlib_libname" >&5
+printf %s "checking for gzread in -l$zlib_libname... " >&6; }
+if eval test \${$as_ac_Lib+y}
 then :
   printf %s "(cached) " >&6
 else case e in #(
   e) ac_check_lib_save_LIBS=$LIBS
-LIBS="-lz  $LIBS"
+LIBS="-l$zlib_libname  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -23073,9 +23134,9 @@ return gzread ();
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
-  ac_cv_lib_z_gzread=yes
+  eval "$as_ac_Lib=yes"
 else case e in #(
-  e) ac_cv_lib_z_gzread=no ;;
+  e) eval "$as_ac_Lib=no" ;;
 esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
@@ -23083,9 +23144,10 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
 LIBS=$ac_check_lib_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_z_gzread" >&5
-printf "%s\n" "$ac_cv_lib_z_gzread" >&6; }
-if test "x$ac_cv_lib_z_gzread" = xyes
+eval ac_res=\$$as_ac_Lib
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+if eval test \"x\$"$as_ac_Lib"\" = x"yes"
 then :
   have_zlib=yes
 else case e in #(
@@ -23106,16 +23168,17 @@ done
 then :
 
       ZLIB_CFLAGS=${ZLIB_CFLAGS-""}
-      ZLIB_LIBS=${ZLIB_LIBS-"-lz"}
+      ZLIB_LIBS=${ZLIB_LIBS-"-l$zlib_libname"}
       py_check_lib_save_LIBS=$LIBS
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for inflateCopy in -lz" >&5
-printf %s "checking for inflateCopy in -lz... " >&6; }
-if test ${ac_cv_lib_z_inflateCopy+y}
+as_ac_Lib=`printf "%s\n" "ac_cv_lib_$zlib_libname""_inflateCopy" | sed "$as_sed_sh"`
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for inflateCopy in -l$zlib_libname" >&5
+printf %s "checking for inflateCopy in -l$zlib_libname... " >&6; }
+if eval test \${$as_ac_Lib+y}
 then :
   printf %s "(cached) " >&6
 else case e in #(
   e) ac_check_lib_save_LIBS=$LIBS
-LIBS="-lz  $LIBS"
+LIBS="-l$zlib_libname  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -23139,9 +23202,9 @@ return inflateCopy ();
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
-  ac_cv_lib_z_inflateCopy=yes
+  eval "$as_ac_Lib=yes"
 else case e in #(
-  e) ac_cv_lib_z_inflateCopy=no ;;
+  e) eval "$as_ac_Lib=no" ;;
 esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
@@ -23149,9 +23212,10 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
 LIBS=$ac_check_lib_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_z_inflateCopy" >&5
-printf "%s\n" "$ac_cv_lib_z_inflateCopy" >&6; }
-if test "x$ac_cv_lib_z_inflateCopy" = xyes
+eval ac_res=\$$as_ac_Lib
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+if eval test \"x\$"$as_ac_Lib"\" = x"yes"
 then :
   printf "%s\n" "#define HAVE_ZLIB_COPY 1" >>confdefs.h
 
@@ -23179,8 +23243,53 @@ printf "%s\n" "yes" >&6; }
     printf "%s\n" "#define HAVE_ZLIB_COPY 1" >>confdefs.h
 
 
+fi
+ ;;
+esac
 fi
 
+if test "x$with_zlib" = xzlib-ng
+then :
+  if test "x$have_zlib" = xyes
+then :
+
+  save_CFLAGS=$CFLAGS
+save_CPPFLAGS=$CPPFLAGS
+save_LDFLAGS=$LDFLAGS
+save_LIBS=$LIBS
+
+
+    CPPFLAGS="$CPPFLAGS $ZLIB_CFLAGS"
+    ac_fn_check_decl "$LINENO" "ZLIBNG_VERSION" "ac_cv_have_decl_ZLIBNG_VERSION" "#include <zlib.h>
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_ZLIBNG_VERSION" = xyes
+then :
+
+else case e in #(
+  e) as_fn_error $? "--with-zlib=zlib-ng: the detected zlib library is not zlib-ng" "$LINENO" 5 ;;
+esac
+fi
+
+CFLAGS=$save_CFLAGS
+CPPFLAGS=$save_CPPFLAGS
+LDFLAGS=$save_LDFLAGS
+LIBS=$save_LIBS
+
+
+
+fi
+fi
+
+case $with_zlib in #(
+  auto|no) :
+     ;; #(
+  *) :
+    if test "x$have_zlib" = xno
+then :
+  as_fn_error $? "--with-zlib=$with_zlib requested but $zlib_name was not found" "$LINENO" 5
+fi ;;
+esac
+
 if test "x$have_zlib" = xyes
 then :
 
@@ -23189,6 +23298,30 @@ then :
 
 fi
 
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for --with-bzip2" >&5
+printf %s "checking for --with-bzip2... " >&6; }
+
+# Check whether --with-bzip2 was given.
+if test ${with_bzip2+y}
+then :
+  withval=$with_bzip2; case $with_bzip2 in #(
+  yes|auto) :
+    with_bzip2=auto ;; #(
+  bzip2|bzip2-rs|no) :
+     ;; #(
+  *) :
+    as_fn_error $? "proper usage is --with(out)-bzip2[=bzip2|bzip2-rs|no]" "$LINENO" 5 ;;
+esac
+else case e in #(
+  e) with_bzip2=auto ;;
+esac
+fi
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $with_bzip2" >&5
+printf "%s\n" "$with_bzip2" >&6; }
+
+case $with_bzip2 in #(
+  auto|bzip2) :
 
 
 
@@ -23201,23 +23334,45 @@ then :
 fi
 
 
+ ;; #(
+  *) :
+     ;;
+esac
+
+if test "x$with_bzip2" = xbzip2-rs
+then :
+
+  bzip2_name="libbz2_rs"
+  bzip2_libname="bz2_rs"
 
+else case e in #(
+  e)
+  bzip2_name="bzip2"
+  bzip2_libname="bz2"
+ ;;
+esac
+fi
 
+if test "x$with_bzip2" = xno
+then :
+  have_bzip2=no
+else case e in #(
+  e)
 
 pkg_failed=no
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for bzip2" >&5
-printf %s "checking for bzip2... " >&6; }
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $bzip2_name" >&5
+printf %s "checking for $bzip2_name... " >&6; }
 
 if test -n "$BZIP2_CFLAGS"; then
     pkg_cv_BZIP2_CFLAGS="$BZIP2_CFLAGS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"bzip2\""; } >&5
-  ($PKG_CONFIG --exists --print-errors "bzip2") 2>&5
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"\$bzip2_name\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "$bzip2_name") 2>&5
   ac_status=$?
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
-  pkg_cv_BZIP2_CFLAGS=`$PKG_CONFIG --cflags "bzip2" 2>/dev/null`
+  pkg_cv_BZIP2_CFLAGS=`$PKG_CONFIG --cflags "$bzip2_name" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
 else
   pkg_failed=yes
@@ -23229,12 +23384,12 @@ if test -n "$BZIP2_LIBS"; then
     pkg_cv_BZIP2_LIBS="$BZIP2_LIBS"
  elif test -n "$PKG_CONFIG"; then
     if test -n "$PKG_CONFIG" && \
-    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"bzip2\""; } >&5
-  ($PKG_CONFIG --exists --print-errors "bzip2") 2>&5
+    { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"\$bzip2_name\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "$bzip2_name") 2>&5
   ac_status=$?
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; then
-  pkg_cv_BZIP2_LIBS=`$PKG_CONFIG --libs "bzip2" 2>/dev/null`
+  pkg_cv_BZIP2_LIBS=`$PKG_CONFIG --libs "$bzip2_name" 2>/dev/null`
 		      test "x$?" != "x0" && pkg_failed=yes
 else
   pkg_failed=yes
@@ -23255,9 +23410,9 @@ else
         _pkg_short_errors_supported=no
 fi
         if test $_pkg_short_errors_supported = yes; then
-                BZIP2_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "bzip2" 2>&1`
+                BZIP2_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "$bzip2_name" 2>&1`
         else
-                BZIP2_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "bzip2" 2>&1`
+                BZIP2_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "$bzip2_name" 2>&1`
         fi
         # Put the nasty error message in config.log where it belongs
         echo "$BZIP2_PKG_ERRORS" >&5
@@ -23278,14 +23433,15 @@ if test "x$ac_cv_header_bzlib_h" = xyes
 then :
   printf "%s\n" "#define HAVE_BZLIB_H 1" >>confdefs.h
 
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for BZ2_bzCompress in -lbz2" >&5
-printf %s "checking for BZ2_bzCompress in -lbz2... " >&6; }
-if test ${ac_cv_lib_bz2_BZ2_bzCompress+y}
+      as_ac_Lib=`printf "%s\n" "ac_cv_lib_$bzip2_libname""_BZ2_bzCompress" | sed "$as_sed_sh"`
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for BZ2_bzCompress in -l$bzip2_libname" >&5
+printf %s "checking for BZ2_bzCompress in -l$bzip2_libname... " >&6; }
+if eval test \${$as_ac_Lib+y}
 then :
   printf %s "(cached) " >&6
 else case e in #(
   e) ac_check_lib_save_LIBS=$LIBS
-LIBS="-lbz2  $LIBS"
+LIBS="-l$bzip2_libname  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -23309,9 +23465,9 @@ return BZ2_bzCompress ();
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
-  ac_cv_lib_bz2_BZ2_bzCompress=yes
+  eval "$as_ac_Lib=yes"
 else case e in #(
-  e) ac_cv_lib_bz2_BZ2_bzCompress=no ;;
+  e) eval "$as_ac_Lib=no" ;;
 esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
@@ -23319,9 +23475,10 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
 LIBS=$ac_check_lib_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_bz2_BZ2_bzCompress" >&5
-printf "%s\n" "$ac_cv_lib_bz2_BZ2_bzCompress" >&6; }
-if test "x$ac_cv_lib_bz2_BZ2_bzCompress" = xyes
+eval ac_res=\$$as_ac_Lib
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+if eval test \"x\$"$as_ac_Lib"\" = x"yes"
 then :
   have_bzip2=yes
 else case e in #(
@@ -23340,7 +23497,7 @@ done
 then :
 
       BZIP2_CFLAGS=${BZIP2_CFLAGS-""}
-      BZIP2_LIBS=${BZIP2_LIBS-"-lbz2"}
+      BZIP2_LIBS=${BZIP2_LIBS-"-l$bzip2_libname"}
 
 fi
 
@@ -23370,14 +23527,15 @@ if test "x$ac_cv_header_bzlib_h" = xyes
 then :
   printf "%s\n" "#define HAVE_BZLIB_H 1" >>confdefs.h
 
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for BZ2_bzCompress in -lbz2" >&5
-printf %s "checking for BZ2_bzCompress in -lbz2... " >&6; }
-if test ${ac_cv_lib_bz2_BZ2_bzCompress+y}
+      as_ac_Lib=`printf "%s\n" "ac_cv_lib_$bzip2_libname""_BZ2_bzCompress" | sed "$as_sed_sh"`
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for BZ2_bzCompress in -l$bzip2_libname" >&5
+printf %s "checking for BZ2_bzCompress in -l$bzip2_libname... " >&6; }
+if eval test \${$as_ac_Lib+y}
 then :
   printf %s "(cached) " >&6
 else case e in #(
   e) ac_check_lib_save_LIBS=$LIBS
-LIBS="-lbz2  $LIBS"
+LIBS="-l$bzip2_libname  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -23401,9 +23559,9 @@ return BZ2_bzCompress ();
 _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
-  ac_cv_lib_bz2_BZ2_bzCompress=yes
+  eval "$as_ac_Lib=yes"
 else case e in #(
-  e) ac_cv_lib_bz2_BZ2_bzCompress=no ;;
+  e) eval "$as_ac_Lib=no" ;;
 esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
@@ -23411,9 +23569,10 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam \
 LIBS=$ac_check_lib_save_LIBS ;;
 esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_bz2_BZ2_bzCompress" >&5
-printf "%s\n" "$ac_cv_lib_bz2_BZ2_bzCompress" >&6; }
-if test "x$ac_cv_lib_bz2_BZ2_bzCompress" = xyes
+eval ac_res=\$$as_ac_Lib
+	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+printf "%s\n" "$ac_res" >&6; }
+if eval test \"x\$"$as_ac_Lib"\" = x"yes"
 then :
   have_bzip2=yes
 else case e in #(
@@ -23432,7 +23591,7 @@ done
 then :
 
       BZIP2_CFLAGS=${BZIP2_CFLAGS-""}
-      BZIP2_LIBS=${BZIP2_LIBS-"-lbz2"}
+      BZIP2_LIBS=${BZIP2_LIBS-"-l$bzip2_libname"}
 
 fi
 
@@ -23450,6 +23609,19 @@ else
 printf "%s\n" "yes" >&6; }
         have_bzip2=yes
 fi
+ ;;
+esac
+fi
+
+case $with_bzip2 in #(
+  auto|no) :
+     ;; #(
+  *) :
+    if test "x$have_bzip2" = xno
+then :
+  as_fn_error $? "--with-bzip2=$with_bzip2 requested but $bzip2_name was not found" "$LINENO" 5
+fi ;;
+esac
 
 
 pkg_failed=no
diff --git a/configure.ac b/configure.ac
index 3a9841b1e7d074..bd4d806e39238e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5704,10 +5704,34 @@ fi
 dnl Check for compression libraries
 AH_TEMPLATE([HAVE_ZLIB_COPY], [Define if the zlib library has inflateCopy])
 
+AC_MSG_CHECKING([for --with-zlib])
+AC_ARG_WITH(
+  [zlib],
+  [AS_HELP_STRING([--with(out)-zlib@<:@=zlib|zlib-ng|zlib-rs|no@:>@],
+                  [select the zlib implementation to link against, or disable
+                   zlib support (default: auto)])],
+  [AS_CASE([$with_zlib],
+     [yes|auto], [with_zlib=auto],
+     [zlib|zlib-ng|zlib-rs|no], [],
+     [AC_MSG_ERROR([proper usage is --with(out)-zlib@<:@=zlib|zlib-ng|zlib-rs|no@:>@])])],
+  [with_zlib=auto])
+AC_MSG_RESULT([$with_zlib])
+
 dnl detect zlib from Emscripten emport
-PY_CHECK_EMSCRIPTEN_PORT([ZLIB], [-sUSE_ZLIB])
+AS_CASE([$with_zlib], [auto|zlib], [PY_CHECK_EMSCRIPTEN_PORT([ZLIB], [-sUSE_ZLIB])])
+
+AS_VAR_IF([with_zlib], [zlib-rs], [
+  AS_VAR_SET([zlib_name], ["libz_rs"])
+  AS_VAR_SET([zlib_version], ["0.6.0"])
+  AS_VAR_SET([zlib_libname], ["z_rs"])
+], [
+  AS_VAR_SET([zlib_name], ["zlib"])
+  AS_VAR_SET([zlib_version], ["1.2.2.1"])
+  AS_VAR_SET([zlib_libname], ["z"])
+])
 
-PKG_CHECK_MODULES([ZLIB], [zlib >= 1.2.2.1], [
+AS_VAR_IF([with_zlib], [no], [have_zlib=no], [
+PKG_CHECK_MODULES([ZLIB], [$zlib_name >= $zlib_version], [
   have_zlib=yes
   dnl zlib 1.2.0 (2003) added inflateCopy
   AC_DEFINE([HAVE_ZLIB_COPY], [1])
@@ -5716,15 +5740,30 @@ PKG_CHECK_MODULES([ZLIB], [zlib >= 1.2.2.1], [
     CPPFLAGS="$CPPFLAGS $ZLIB_CFLAGS"
     LIBS="$LIBS $ZLIB_LIBS"
     AC_CHECK_HEADERS([zlib.h], [
-      PY_CHECK_LIB([z], [gzread], [have_zlib=yes], [have_zlib=no])
+      PY_CHECK_LIB([$zlib_libname], [gzread], [have_zlib=yes], [have_zlib=no])
     ], [have_zlib=no])
     AS_VAR_IF([have_zlib], [yes], [
       ZLIB_CFLAGS=${ZLIB_CFLAGS-""}
-      ZLIB_LIBS=${ZLIB_LIBS-"-lz"}
-      PY_CHECK_LIB([z], [inflateCopy], [AC_DEFINE([HAVE_ZLIB_COPY], [1])])
+      ZLIB_LIBS=${ZLIB_LIBS-"-l$zlib_libname"}
+      PY_CHECK_LIB([$zlib_libname], [inflateCopy], [AC_DEFINE([HAVE_ZLIB_COPY], [1])])
     ])
   ])
 ])
+])
+
+AS_VAR_IF([with_zlib], [zlib-ng], [AS_VAR_IF([have_zlib], [yes], [
+  WITH_SAVE_ENV([
+    CPPFLAGS="$CPPFLAGS $ZLIB_CFLAGS"
+    AC_CHECK_DECL([ZLIBNG_VERSION], [],
+      [AC_MSG_ERROR([--with-zlib=zlib-ng: the detected zlib library is not zlib-ng])],
+      [@%:@include <zlib.h>])
+  ])
+])])
+
+AS_CASE([$with_zlib],
+  [auto|no], [],
+  [AS_VAR_IF([have_zlib], [no],
+    [AC_MSG_ERROR([--with-zlib=$with_zlib requested but $zlib_name was not found])])])
 
 dnl binascii can use zlib for optimized crc32.
 AS_VAR_IF([have_zlib], [yes], [
@@ -5732,22 +5771,50 @@ AS_VAR_IF([have_zlib], [yes], [
   BINASCII_LIBS="$ZLIB_LIBS"
 ])
 
+AC_MSG_CHECKING([for --with-bzip2])
+AC_ARG_WITH(
+  [bzip2],
+  [AS_HELP_STRING([--with(out)-bzip2@<:@=bzip2|bzip2-rs|no@:>@],
+                  [select the bzip2 implementation to link against, or disable
+                   bzip2 support (default: auto)])],
+  [AS_CASE([$with_bzip2],
+     [yes|auto], [with_bzip2=auto],
+     [bzip2|bzip2-rs|no], [],
+     [AC_MSG_ERROR([proper usage is --with(out)-bzip2@<:@=bzip2|bzip2-rs|no@:>@])])],
+  [with_bzip2=auto])
+AC_MSG_RESULT([$with_bzip2])
+
 dnl detect bzip2 from Emscripten emport
-PY_CHECK_EMSCRIPTEN_PORT([BZIP2], [-sUSE_BZIP2])
+AS_CASE([$with_bzip2], [auto|bzip2], [PY_CHECK_EMSCRIPTEN_PORT([BZIP2], [-sUSE_BZIP2])])
 
-PKG_CHECK_MODULES([BZIP2], [bzip2], [have_bzip2=yes], [
+AS_VAR_IF([with_bzip2], [bzip2-rs], [
+  AS_VAR_SET([bzip2_name], ["libbz2_rs"])
+  AS_VAR_SET([bzip2_libname], ["bz2_rs"])
+], [
+  AS_VAR_SET([bzip2_name], ["bzip2"])
+  AS_VAR_SET([bzip2_libname], ["bz2"])
+])
+
+AS_VAR_IF([with_bzip2], [no], [have_bzip2=no], [
+PKG_CHECK_MODULES([BZIP2], [$bzip2_name], [have_bzip2=yes], [
   WITH_SAVE_ENV([
     CPPFLAGS="$CPPFLAGS $BZIP2_CFLAGS"
     LIBS="$LIBS $BZIP2_LIBS"
     AC_CHECK_HEADERS([bzlib.h], [
-      AC_CHECK_LIB([bz2], [BZ2_bzCompress], [have_bzip2=yes], [have_bzip2=no])
+      AC_CHECK_LIB([$bzip2_libname], [BZ2_bzCompress], [have_bzip2=yes], [have_bzip2=no])
     ], [have_bzip2=no])
     AS_VAR_IF([have_bzip2], [yes], [
       BZIP2_CFLAGS=${BZIP2_CFLAGS-""}
-      BZIP2_LIBS=${BZIP2_LIBS-"-lbz2"}
+      BZIP2_LIBS=${BZIP2_LIBS-"-l$bzip2_libname"}
     ])
   ])
 ])
+])
+
+AS_CASE([$with_bzip2],
+  [auto|no], [],
+  [AS_VAR_IF([have_bzip2], [no],
+    [AC_MSG_ERROR([--with-bzip2=$with_bzip2 requested but $bzip2_name was not found])])])
 
 PKG_CHECK_MODULES([LIBLZMA], [liblzma], [have_liblzma=yes], [
   WITH_SAVE_ENV([