diff -up Python-2.6.6/setup.py.add-RPATH-to-pyexpat Python-2.6.6/setup.py
--- Python-2.6.6/setup.py.add-RPATH-to-pyexpat	2012-08-15 11:36:26.042932293 -0400
+++ Python-2.6.6/setup.py	2012-08-15 12:09:43.344564591 -0400
@@ -1318,11 +1318,19 @@ class PyBuildExt(build_ext):
                              'expat/xmlrole.c',
                              'expat/xmltok.c']
 
+        # Add an explicit RPATH to pyexpat.so pointing at the directory
+        # containing the system expat (which has the extra XML_SetHashSalt
+        # symbol), to avoid an ImportError with a link error if there's an
+        # LD_LIBRARY_PATH containing a "vanilla" build of expat (without the
+        # symbol) (rhbz#833271):
+        EXPAT_RPATH = '/lib64' if sys.maxint == 0x7fffffffffffffff else '/lib'
+
         exts.append(Extension('pyexpat',
                               define_macros = define_macros,
                               include_dirs = expat_inc,
                               libraries = expat_lib,
-                              sources = ['pyexpat.c'] + expat_sources
+                              sources = ['pyexpat.c'] + expat_sources,
+                              extra_link_args = ['-Wl,-rpath,%s' % EXPAT_RPATH]
                               ))
 
         # Fredrik Lundh's cElementTree module.  Note that this also