From dc1a42e33fb5cb4047ab8847bc8e36ee7aca644b Mon Sep 17 00:00:00 2001
From: Andrew Whatson <whatson@gmail.com>
Date: Sun, 17 Jul 2022 02:13:29 +1000
Subject: [PATCH] Fix missing i/o routines

---
 prescheme/prescheme.scm | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/prescheme/prescheme.scm b/prescheme/prescheme.scm
index 894f21f..8f90e84 100644
--- a/prescheme/prescheme.scm
+++ b/prescheme/prescheme.scm
@@ -13,6 +13,14 @@
   #:use-module (prescheme scheme48)
   #:use-module (prescheme platform)
   #:use-module (prescheme ps-defenum)
+  #:use-module ((ice-9 ports)
+                #:select (open-input-file
+                          open-output-file
+                          close-input-port
+                          close-output-port
+                          read-char
+                          peek-char)
+                #:prefix scheme:)
   #:export (shift-left arithmetic-shift-right logical-shift-right
 
             deallocate