Fix for issue #9164: with this patch sysconfig and distuls don't break

when duplicate '-arch foo' flags end up in CFLAGS (which may happen when
building a universal build using macports)

Lib/distutils/util.py

@@ -144,8 +144,7 @@ def get_platform ():
                 cflags = get_config_vars().get('CFLAGS')
 
                 archs = re.findall('-arch\s+(\S+)', cflags)
-                archs.sort()
-                archs = tuple(archs)
+                archs = tuple(sorted(set(archs)))
 
                 if len(archs) == 1:
                     machine = archs[0]

Lib/sysconfig.py

@@ -645,8 +645,7 @@ def get_platform():
                 cflags = get_config_vars().get('CFLAGS')
 
                 archs = re.findall('-arch\s+(\S+)', cflags)
-                archs.sort()
-                archs = tuple(archs)
+                archs = tuple(sorted(set(archs)))
 
                 if len(archs) == 1:
                     machine = archs[0]

Misc/NEWS

@@ -33,6 +33,8 @@ Library
 
 - Issue #9128: Fix validation of class decorators in parser module.
 
+- Issue #9164: Ensure sysconfig handles dupblice archs while building on OSX
+
 Extension Modules
 -----------------