$NetBSD: patch-ap,v 1.2 2019/09/02 21:41:40 nia Exp $

--- extend.c.orig	1988-07-03 17:48:52.000000000 +0000
+++ extend.c
@@ -18,7 +18,9 @@
 #endif
 #endif
 
-extern	char	*strncpy();
+#include <stdlib.h>
+#include <string.h>
+
 extern	int rescan();
 
 /* insert a string, mainly for use from macros (created by selfinsert) */
@@ -68,6 +70,8 @@ int f, n;
  * don't have them.  Care is taken so running out of memory will leave
  * the keymap in a usable state.
  */
+static	KEYMAP *realocmap();
+
 static int remap(curmap, c, funct, pref_map)
 register KEYMAP	*curmap;/* pointer to the map being changed */
 int	c;		/* character being changed */
@@ -80,7 +84,6 @@ KEYMAP	*pref_map;	/* if funct==prefix, m
 	KEYMAP	*mp;
 	PF	*pfp;
 	MAP_ELEMENT *mep;
-	static	KEYMAP *realocmap();
 
 	if(ele >= &curmap->map_element[curmap->map_num] || c < ele->k_base) {
 	    if(ele > &curmap->map_element[0] && (funct!=prefix ||
@@ -225,13 +228,14 @@ KEYMAP	*pref_map;	/* if funct==prefix, m
 	return TRUE;
 }
 
+static VOID fixmap();
+
 /* reallocate a keymap, used above */
 static KEYMAP *realocmap(curmap)
 register KEYMAP *curmap;
 {
     register KEYMAP *mp;
     register int i;
-    static VOID fixmap();
     extern int nmaps;
 
     if((mp = (KEYMAP *)malloc((unsigned)(sizeof(KEYMAP)+
@@ -402,7 +406,6 @@ define_key(f, n)
 {
     static char buf[48] = "Define key map: ";
     MAPS *mp;
-    char *strncat();
 
     buf[16] = '\0';
     if(eread(buf, &buf[16], 48 - 16, EFNEW) != TRUE) return FALSE;
@@ -550,6 +553,8 @@ load(fname) char *fname; {
 	return TRUE;
 }
 
+static	char	*skipwhite(), *parsetoken();
+
 /*
  * excline - run a line from a load file or eval-expression.
  * if FKEYS is defined, duplicate functionallity of dobind so function
@@ -578,7 +583,6 @@ register char *line;
 #endif
 	PF	name_function();
 	LINE	*lalloc();
-	static	char	*skipwhite(), *parsetoken();
 
 	if(macrodef || inmacro) {
 		ewprintf("Not now!");