Make numerous improvements

- Python static hello world now 1.8mb
- Python static fully loaded now 10mb
- Python HTTPS client now uses MbedTLS
- Python REPL now completes import stmts
- Increase stack size for Python for now
- Begin synthesizing posixpath and ntpath
- Restore Python \N{UNICODE NAME} support
- Restore Python NFKD symbol normalization
- Add optimized code path for Intel SHA-NI
- Get more Python unit tests passing faster
- Get Python help() pagination working on NT
- Python hashlib now supports MbedTLS PBKDF2
- Make memcpy/memmove/memcmp/bcmp/etc. faster
- Add Mersenne Twister and Vigna to LIBC_RAND
- Provide privileged __printf() for error code
- Fix zipos opendir() so that it reports ENOTDIR
- Add basic chmod() implementation for Windows NT
- Add Cosmo's best functions to Python cosmo module
- Pin function trace indent depth to that of caller
- Show memory diagram on invalid access in MODE=dbg
- Differentiate stack overflow on crash in MODE=dbg
- Add stb_truetype and tools for analyzing font files
- Upgrade to UNICODE 13 and reduce its binary footprint
- COMPILE.COM now logs resource usage of build commands
- Start implementing basic poll() support on bare metal
- Set getauxval(AT_EXECFN) to GetModuleFileName() on NT
- Add descriptions to strerror() in non-TINY build modes
- Add COUNTBRANCH() macro to help with micro-optimizations
- Make error / backtrace / asan / memory code more unbreakable
- Add fast perfect C implementation of μ-Law and a-Law audio codecs
- Make strtol() functions consistent with other libc implementations
- Improve Linenoise implementation (see also github.com/jart/bestline)
- COMPILE.COM now suppresses stdout/stderr of successful build commands

third_party/python/Lib/ntpath.py

@@ -276,7 +276,7 @@ def lexists(path):
 # common case: drive letter roots. The alternative which uses GetVolumePathName
 # fails if the drive letter is the result of a SUBST.
 try:
-    from nt import _getvolumepathname
+    from posix import _getvolumepathname
 except ImportError:
     _getvolumepathname = None
 def ismount(path):
@@ -522,9 +522,7 @@ def _abspath_fallback(path):
     """Return the absolute version of a path as a fallback function in case
     `nt._getfullpathname` is not available or raises OSError. See bpo-31047 for
     more.
-
     """
-
     path = os.fspath(path)
     if not isabs(path):
         if isinstance(path, bytes):
@@ -536,7 +534,7 @@ def _abspath_fallback(path):
 
 # Return an absolute path.
 try:
-    from nt import _getfullpathname
+    from posix import _getfullpathname
 
 except ImportError: # not running on Windows - mock up something sensible
     abspath = _abspath_fallback
@@ -551,9 +549,7 @@ else:  # use native Windows method on Windows
 
 # realpath is a no-op on systems without islink support
 realpath = abspath
-# Win9x family and earlier have no Unicode filename support.
-supports_unicode_filenames = (hasattr(sys, "getwindowsversion") and
-                              sys.getwindowsversion()[3] >= 2)
+supports_unicode_filenames = True
 
 def relpath(path, start=None):
     """Return a relative version of a path"""
@@ -668,10 +664,10 @@ try:
     # GetFinalPathNameByHandle is available starting with Windows 6.0.
     # Windows XP and non-Windows OS'es will mock _getfinalpathname.
     if sys.getwindowsversion()[:2] >= (6, 0):
-        from nt import _getfinalpathname
+        from posix import _getfinalpathname
     else:
         raise ImportError
-except (AttributeError, ImportError):
+except (AttributeError, ImportError, OSError):
     # On Windows XP and earlier, two files are the same if their absolute
     # pathnames are the same.
     # Non-Windows operating systems fake this method with an XP
@@ -685,7 +681,7 @@ try:
     # attribute to tell whether or not the path is a directory.
     # This is overkill on Windows - just pass the path to GetFileAttributes
     # and check the attribute from there.
-    from nt import _isdir as isdir
+    from posix import _isdir as isdir
 except ImportError:
     # Use genericpath.isdir as imported above.
     pass