Fix extracted C extensions not having executable permissions under Cygwin.

(backport from trunk)

--HG--
branch : setuptools-0.6
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/branches/setuptools-0.6%4053674

pkg_resources.py

@@ -883,6 +883,23 @@ variable to point to an accessible directory.
         return target_path
 
 
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     def postprocess(self, tempname, filename):
         """Perform any platform-specific postprocessing of `tempname`
 
@@ -897,7 +914,31 @@ variable to point to an accessible directory.
         is the name it will be renamed to by the caller after this routine
         returns.
         """
-        # XXX
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+        if os.name == 'posix':
+            # Make the resource executable
+            mode = ((os.stat(tempname).st_mode) | 0555) & 07777
+            os.chmod(tempname, mode)
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     def set_extraction_path(self, path):

pkg_resources.txt

@@ -1692,6 +1692,9 @@ File/Path Utilities
 Release Notes/Change History
 ----------------------------
 
+0.6c6
+ * Fix extracted C extensions not having executable permissions under Cygwin.
+
 0.6c4
  * Fix "dev" versions being considered newer than release candidates.