+
+# This option might be made default in the future
+# Currently it is only useful to ensure existing code will work
+# if PACKED_STACK is also defined.
+AC_ARG_ENABLE(devel-strong-type-checking,
+ AS_HELP_STRING([--enable-devel-strong-type-checking],
+ [Devel mode for strong type checking]),
+ [STRONG_TYPE_CHECKING=$enableval], [STRONG_TYPE_CHECKING=no])
+if test "x$DEBUG" = xyes -o x"$STRONG_TYPE_CHECKING" = xyes; then