fix some buildbreaks

Author: SilvanScherrer

Lib/pathlib/_local.py

@@ -504,7 +504,7 @@ def __init__(self, *args, **kwargs):
 
     def __new__(cls, *args, **kwargs):
         if cls is Path:
-            cls = WindowsPath if os.name in ['nt', 'os2] else PosixPath
+            cls = WindowsPath if os.name in ['nt', 'os2'] else PosixPath
         return object.__new__(cls)
 
     def stat(self, *, follow_symlinks=True):
@@ -843,7 +843,7 @@ class PosixPath(Path, PurePosixPath):
     """
     __slots__ = ()
 
-    if os.name == 'nt':
+    if os.name in ['nt', 'os2']:
         def __new__(cls, *args, **kwargs):
             raise UnsupportedOperation(
                 f"cannot instantiate {cls.__name__!r} on your system")
@@ -855,7 +855,7 @@ class WindowsPath(Path, PureWindowsPath):
     """
     __slots__ = ()
 
-    if os.name !in ['nt', 'os2]:
+    if os.name not in ['nt', 'os2']:
         def __new__(cls, *args, **kwargs):
             raise UnsupportedOperation(
                 f"cannot instantiate {cls.__name__!r} on your system")

configure.ac

@@ -6246,8 +6246,8 @@ AC_SUBST([LIBPYTHON])
 MODULE_DEPS_SHARED='$(MODULE_DEPS_STATIC) $(EXPORTSYMS)'
 LIBPYTHON=''
 
-# On Android and Cygwin the shared libraries must be linked with libpython.
-if test "$PY_ENABLE_SHARED" = "1" && ( test -n "$ANDROID_API_LEVEL" || test "$MACHDEP" = "cygwin"); then
+# On Android, OS/2 and Cygwin the shared libraries must be linked with libpython.
+if test "$PY_ENABLE_SHARED" = "1" && ( test -n "$ANDROID_API_LEVEL" || test "$MACHDEP" = "cygwin" || test "$MACHDEP" = "os2knix"); then
   MODULE_DEPS_SHARED="$MODULE_DEPS_SHARED \$(LDLIBRARY)"
   LIBPYTHON="\$(BLDLIBRARY)"
 fi