Ensure input and output are syntaxed early on.

diff --git a/src/runtime/runtime.sf b/src/runtime/runtime.sf
index 09d7a8aa2f3353ae92fdca99275013c06525ffd8..1452282731bc49b745a3e5ee98f5aad19618f7f6 100644 (file)
--- a/src/runtime/runtime.sf
+++ b/src/runtime/runtime.sf
@@ -33,6 +33,8 @@ USA.
   (sf-conditionally "os2winp")
 
   (sf-conditionally "port")
+  (sf-conditionally "input")
+  (sf-conditionally "output")
   (sf-directory "."))
 
 ;; Guarantee that the package modeller is loaded.  load-option ensures