X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/runlisp/blobdiff_plain/42ca052285de2281e425b7dc470f62621127b3e1..7e3a86038e2a2cbb48b356cb029f9de99c14ec79:/README.org

diff --git a/README.org b/README.org
index 821b4c9..fd8c9e4 100644
--- a/README.org
+++ b/README.org
@@ -69,6 +69,13 @@ in the ~-L~ option, separated by commas:
 :                          #-(or sbcl ccl) "an unexpected"
 :                          " Common Lisp!~%"))
 
+It is not an error to include the name of an unrecognized Lisp system in
+the ~-L~ option: such names are simply ignored.  This allows a script to
+declare support for unusual or locally installed Lisp systems without
+compromising its portability to sites where such systems are unknown, or
+which are still running older versions of ~runlisp~ which haven't been
+updated with the necessary configuration for those systems.
+
 ** Embedded options
 
 If your script requires features of particular Lisp implementations