Index: lib/autoconf/general.m4
===================================================================
RCS file: /sources/autoconf/autoconf/lib/autoconf/general.m4,v
retrieving revision 1.944
diff -u -r1.944 general.m4
--- lib/autoconf/general.m4	18 Dec 2006 20:10:05 -0000	1.944
+++ lib/autoconf/general.m4	19 Dec 2006 01:40:42 -0000
@@ -1401,6 +1401,7 @@
 [],
 [m4_divert_once([HELP_ENABLE], [[
 Optional Features:
+  --disable-option-checking  ignore unrecognized --enable/--with options
   --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]]])])dnl
 m4_divert_once([HELP_ENABLE], [$2])dnl