Index: configure.in
===================================================================
--- configure.in	(revision 74593)
+++ configure.in	(working copy)
@@ -1533,7 +1533,7 @@
     if test "${enable_universalsdk}"; then
 	    :
     else
-	LIBTOOL_CRUFT="${LIBTOOL_CRUFT} -arch_only `arch`"
+        LIBTOOL_CRUFT="${LIBTOOL_CRUFT} -arch_only `arch`"
     fi
     LIBTOOL_CRUFT=$LIBTOOL_CRUFT' -install_name $(PYTHONFRAMEWORKINSTALLDIR)/Versions/$(VERSION)/$(PYTHONFRAMEWORK)'
     LIBTOOL_CRUFT=$LIBTOOL_CRUFT' -compatibility_version $(VERSION) -current_version $(VERSION)';;
@@ -1545,7 +1545,46 @@
         else 
             LIBTOOL_CRUFT=""
     fi
-    LIBTOOL_CRUFT=$LIBTOOL_CRUFT" -lSystem -lSystemStubs -arch_only `arch`"
+    AC_TRY_RUN([[
+    #include <unistd.h>
+    int main(int argc, char*argv[])
+    {
+      if (sizeof(long) == 4) {
+    	  return 0;
+      } else {
+      	  return 1;
+      }
+    ]], ac_osx_32bit=yes,
+       ac_osx_32bit=no,
+       ac_osx_32bit=no)
+    
+    if test "${ac_osx_32bit}" = "yes"; then
+    	case `arch` in
+    	i386) 
+    		DEFAULT_ARCH="i386" 
+    		;;
+    	ppc) 
+    		DEFAULT_ARCH="ppc" 
+    		;;
+    	*)
+    		AC_MSG_ERROR([Unexpected output of 'arch' on OSX])
+    		;;
+    	esac
+    else
+    	case `arch` in
+    	i386) 
+    		DEFAULT_ARCH="x86_64" 
+    		;;
+    	ppc) 
+    		DEFAULT_ARCH="ppc64" 
+    		;;
+    	*)
+    		AC_MSG_ERROR([Unexpected output of 'arch' on OSX])
+    		;;
+    	esac
+    fi
+
+    LIBTOOL_CRUFT=$LIBTOOL_CRUFT" -lSystem -lSystemStubs -arch_only ${DEFAULT_ARCH}"
     LIBTOOL_CRUFT=$LIBTOOL_CRUFT' -install_name $(PYTHONFRAMEWORKINSTALLDIR)/Versions/$(VERSION)/$(PYTHONFRAMEWORK)'
     LIBTOOL_CRUFT=$LIBTOOL_CRUFT' -compatibility_version $(VERSION) -current_version $(VERSION)';;
 esac