+AM_CONDITIONAL([BUILD_AIX],[test "x$x$ac_system" = "xAIX"])
+
+if test "x$ac_system" = "xAIX"
+then
+ with_perfstat="yes"
+ with_procinfo="yes"
+else
+ with_perfstat="no (AIX only)"
+ with_procinfo="no (AIX only)"
+fi
+
+if test "x$with_perfstat" = "xyes"
+then
+ AC_CHECK_LIB(perfstat, perfstat_reset, [with_perfstat="yes"], [with_perfstat="no (perfstat not found)"], [])
+# AC_CHECK_HEADERS(sys/protosw.h libperfstat.h,, [with_perfstat="no (perfstat not found)"])
+fi
+if test "x$with_perfstat" = "xyes"
+then
+ AC_DEFINE(HAVE_PERFSTAT, 1, [Define to 1 if you have the 'perfstat' library (-lperfstat)])
+fi
+AM_CONDITIONAL(BUILD_WITH_PERFSTAT, test "x$with_perfstat" = "xyes")
+
+# Processes plugin under AIX.
+if test "x$with_procinfo" = "xyes"
+then
+ AC_CHECK_HEADERS(procinfo.h,, [with_procinfo="no (procinfo.h not found)"])
+fi
+if test "x$with_procinfo" = "xyes"
+then
+ AC_DEFINE(HAVE_PROCINFO_H, 1, [Define to 1 if you have the procinfo.h])
+fi
+