--- a/src/mpi/wscript	Mon Nov 05 12:10:55 2012 -0800
+++ a/src/mpi/wscript	Mon Nov 19 16:01:17 2012 -0800
@@ -22,7 +22,7 @@ 
             conf.env['ENABLE_MPI'] = True
             for libpath in conf.env.LIBPATH_MPI:
                 if 'mpi' in libpath:
-                    conf.env.append_value('LINKFLAGS_MPI', '-Wl,-rpath='+libpath)
+                    conf.env.append_value('LINKFLAGS_MPI', '-Wl,-rpath,'+libpath)
             conf.report_optional_feature("mpi", "MPI Support", True, '')            
         else:
             conf.report_optional_feature("mpi", "MPI Support", False, 'mpic++ not found')
--- a/src/wscript	Mon Nov 05 12:10:55 2012 -0800
+++ a/src/wscript	Mon Nov 19 16:01:17 2012 -0800
@@ -58,7 +58,7 @@ 
     blddir = os.path.abspath(os.path.join(conf.bldnode.abspath(), conf.variant))
     conf.env.append_value('NS3_MODULE_PATH', blddir)
     if Options.options.enable_rpath:
-        conf.env.append_value('RPATH', '-Wl,-rpath=%s' % (os.path.join(blddir),))
+        conf.env.append_value('RPATH', '-Wl,-rpath,%s' % (os.path.join(blddir),))
 
     ## Used to link the 'test-runner' program with all of ns-3 code
     conf.env['NS3_MODULES'] = ['ns3-' + module.split('/')[-1] for module in all_modules]