Change Thread.join() with a negative timeout to just return.  The
behavior isn't documented then, but this restores previous
behavior.

10.8+ when using a universal Python that included a PPC architecture,
such as with a python.org 32-bit-only binary installer.

are individually controlled by #ifdef statements in the extension
code.

Issue #19375: The site module adding a "site-python" directory to sys.path, if it exists, is now deprecated.

Issue #11161: Update the documentation for ProcessPoolExecutor to note that it will not work in the interactive shell.

being defined on top of __name__.

source importlib.

unittest.TestCase in prep of running tests under frozen and source
importlib.

retry on EINTR).

of OPT for special build options.  By setting OPT, some compiler-specific
options like -fwrapv were overridden and thus not used, which could result
in broken interpreters when building with clang.

64-bit/32-bit installer for 10.6+.  It is no longer necessary
to install a third-party version of Tcl/Tk 8.5 to work around the
problems in the Apple-supplied Tcl/Tk 8.5 shipped in OS X 10.6
and later releases.

when building _tkinter.  configure has two new options; if used, both must
be specified:

  ./configure \
      --with-tcltk-includes="-I/opt/local/include" \
      --with-tcltk-libs="-L/opt/local/lib -ltcl8.5 -ltk8.5"

In addition, the options can be overridden with make:

   make \
       TCLTK_INCLUDES="-I/opt/local/include" \
       TCLTK_LIBS="-L/opt/local/lib -ltcl8.6 -ltk8.6"

argument.  Original patch by Arfrever Frehtes Taifersar Arahesis.

argument.  Original patch by Arfrever Frehtes Taifersar Arahesis.

argument.  Original patch by Arfrever Frehtes Taifersar Arahesis.

argument.  Original patch by Arfrever Frehtes Taifersar Arahesis.

Close #19379: Lazily import linecache in the warnings module, to make startup with warnings faster until a warning gets printed.