Index: apr-1.4.6/configure
===================================================================
--- apr-1.4.6.orig/configure	2012-02-08 00:17:57.000000000 +0100
+++ apr-1.4.6/configure	2012-07-23 17:11:35.000000000 +0200
@@ -6140,7 +6140,7 @@
   fi
 
 	        ;;
-            *-ibm-aix5*)
+            *-ibm-aix5*|*-ibm-aix6*)
 
   if test "x$CPPFLAGS" = "x"; then
     test "x$silent" != "xyes" && echo "  setting CPPFLAGS to \"-D_USE_IRS\""
@@ -23530,7 +23530,7 @@
          pid_t_fmt='#define APR_PID_T_FMT "ld"'
        fi
        ;;
-   *aix4*|*aix5*)
+   *aix4*|*aix5*|*aix6*)
        ssize_t_fmt="ld"
        size_t_fmt="lu"
        ;;