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--- cdecl.c.orig	Mon Jan 15 19:54:46 1996
+++ cdecl.c	Sat Sep  4 20:02:59 1999
@@ -67,6 +67,9 @@
 # include <stddef.h>
 # include <string.h>
 # include <stdarg.h>
+# ifndef DOS
+#  include <errno.h>  /* only M$-DOS environments have ``errno'' in stdlib.h */
+# endif /* ndef DOS */
 #else
 # ifndef NOVARARGS
 #  include <varargs.h>