diff -ur net-snmp-5.3.org/configure.in net-snmp-5.3/configure.in
--- net-snmp-5.3.org/configure.in	2005-12-28 18:20:56.000000000 +0100
+++ net-snmp-5.3/configure.in	2006-01-09 01:07:39.031490000 +0100
@@ -2661,23 +2661,6 @@
     LIBS="${LIBS} -ladm"
     AGENTLIBS="${AGENTLIBS} -ladm"))
 
-case $target_os in
-    aix*) # AIX perfstat library, needed for CPU/memory statistics
-        AC_CHECK_HEADERS(libperfstat.h,
-            AC_CHECK_LIB(perfstat, perfstat_cpu_total, AC_DEFINE(HAVE_PERFSTAT)
-            AGENTLIBS="${AGENTLIBS} -lperfstat"), AC_MSG_ERROR([
-
-*** To monitor CPU/memory values in AIX you need to install
-*** libperfstat which can be found in bos.perf
-]))
-        ;;
-    hpux*) # HP-UX agent needs open_mib
-        AC_CHECK_LIB(nm, open_mib, AC_DEFINE(HAVE_LIBNM)
-            AGENTLIBS="${AGENTLIBS} -lnm")
-        ;;
-    *)
-        ;;
-esac
 # WIN32
 # (mingw32 must link winsock explicitly)
 AC_CHECK_HEADERS(winsock.h,[
@@ -2880,7 +2863,7 @@
 
 AC_MSG_RESULT([$ac_cv_type_ssize_t])
 if test $ac_cv_type_ssize_t = yes; then
-  AC_DEFINE(HAVE_SSIZE_T)
+  AC_DEFINE(HAVE_SSIZE_T,,[have ssize_t])
 fi
 
 # Check ps args