+dnl ---------------------------------------------------------------------------
+dnl Macro: deprecated
+dnl ---------------------------------------------------------------------------
+AC_ARG_ENABLE([deprecated],
+ [AS_HELP_STRING([--enable-deprecated],
+ [Enable deprecated interface @<:@default=off@:>@])],
+ [ac_enable_deprecated="$enableval"],
+ [ac_enable_deprecated="no"])
+
+if test "x$ac_enable_deprecated" = "xyes"
+then
+ DEPRECATED="#define MEMCACHED_ENABLE_DEPRECATED 1"
+fi
+
+AC_SUBST(DEPRECATED)
+dnl ---------------------------------------------------------------------------
+dnl End Macro: deprecated
+dnl ---------------------------------------------------------------------------