parameter from os.remove / os.unlink.
Patch written by Georg Brandl.  (I'm really looking forward to George
getting commit privileges so I don't have to keep doing checkins on his
behalf.)

(this could reveal test failures!)

- Try to avoid building Python or extension modules with problematic
  llvm-gcc compiler.
- Since Xcode 4 removes ppc support, extension module builds now
  check for ppc compiler support and automatically remove ppc and
  ppc64 archs when not available.
- Since Xcode 4 no longer install SDKs in default locations,
  extension module builds now revert to using installed headers
  and libs if the SDK used to build the interpreter is not
  available.
- Update ./configure to use better defaults for universal builds;
  in particular, --enable-universalsdk=yes uses the Xcode default
  SDK and --with-universal-archs now defaults to "intel" if ppc
  not available.

Also add an explicit test for safe implementation usage on supported platforms.

As a side effect, this commit adds a module-level attribute 'rmtree_is_safe'
which offers introspection whether the current rmtree implementation is safe
against symlink attacks.

to override environment variables.

Issue #15142: Fix reference leak when deallocating instances of types created using PyType_FromSpec().

Issue #12965: Clean up C-API docs for PyLong_AsLongLong(AndOverflow); clarify that __int__ will be called for non-PyLongs

It is used automatically on platforms supporting the necessary os.openat() and
os.unlinkat() functions. Main code by Martin von Löwis.

(patch by Serhiy)

#15114: the strict mode of HTMLParser and the HTMLParseError exception are deprecated now that the parser is able to parse invalid markup.

Issue #15142: Fix reference leak when deallocating instances of types created using PyType_FromSpec().