diff -Naur macutils.orig/binhex/binhex.c macutils/binhex/binhex.c
--- macutils.orig/binhex/binhex.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/binhex/binhex.c	2016-07-26 17:55:20.160706531 -0400
@@ -1,12 +1,16 @@
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
 #include "../fileio/machdr.h"
 #include "../fileio/rdfile.h"
 #include "../util/patchlevel.h"
 
-extern char *malloc();
-extern char *realloc();
-extern char *strcat();
-extern void exit();
+extern int rdfileopt(char c);
+extern int do_query();
+extern void give_rdfileopt();
+extern char *get_rdfileopt();
 extern void transname();
 extern void do_indent();
 extern void dofile();
diff -Naur macutils.orig/binhex/dofile.c macutils/binhex/dofile.c
--- macutils.orig/binhex/dofile.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/binhex/dofile.c	2016-07-26 17:42:21.590752572 -0400
@@ -1,3 +1,4 @@
+#include <stdio.h>
 #include "../fileio/machdr.h"
 #include "../fileio/rdfile.h"
 
diff -Naur macutils.orig/comm/frommac.c macutils/comm/frommac.c
--- macutils.orig/comm/frommac.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/comm/frommac.c	2016-07-26 17:47:31.237734261 -0400
@@ -1,4 +1,7 @@
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
 #include "comm.h"
 #include "../util/patchlevel.h"
 #include "../fileio/machdr.h"
@@ -8,7 +11,14 @@
 
 #define LOCALOPT	"lmxyzoTVH"
 
-extern void exit();
+extern void cleanup();
+extern unsigned long get4();
+extern void transname(char *name, char *namebuf, int n);
+extern void xm_from();
+extern void give_wrfileopt();
+extern int wrfileopt();
+extern char *get_wrfileopt();
+extern void set_wrfileopt();
 extern void setup_tty();
 extern void reset_tty();
 
@@ -32,7 +42,7 @@
     char fauth[5];
     char ftype[5];
 
-    set_wrfileopt(0);
+    set_wrfileopt(NULL);
     (void)strcat(options, get_wrfileopt());
     (void)strcat(options, LOCALOPT);
     errflg = 0;
diff -Naur macutils.orig/comm/tomac.c macutils/comm/tomac.c
--- macutils.orig/comm/tomac.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/comm/tomac.c	2016-07-26 17:55:25.982706186 -0400
@@ -1,14 +1,19 @@
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
 #include "comm.h"
 #include "../fileio/machdr.h"
 #include "../fileio/rdfile.h"
 #include "../util/patchlevel.h"
 #include "globals.h"
 
-extern char *malloc();
-extern char *realloc();
-extern char *strcat();
-extern void exit();
+extern int rdfileopt(char c);
+extern void give_rdfileopt();
+extern int do_query();
+extern char *get_rdfileopt();
+extern void xm_to();
 extern void transname();
 extern void do_indent();
 extern void dofile();
diff -Naur macutils.orig/comm/tty.c macutils/comm/tty.c
--- macutils.orig/comm/tty.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/comm/tty.c	2016-07-26 17:38:25.120766555 -0400
@@ -1,4 +1,6 @@
 #include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
 #include <signal.h>
 #ifndef TERMIOS_H
 #include <sgtty.h>
@@ -101,7 +103,7 @@
     }
 }
 
-tgetrec(buf, count, timeout)
+int tgetrec(buf, count, timeout)
 char *buf;
 int count, timeout;
 {
diff -Naur macutils.orig/comm/xm_from.c macutils/comm/xm_from.c
--- macutils.orig/comm/xm_from.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/comm/xm_from.c	2016-07-26 17:47:36.283733962 -0400
@@ -7,6 +7,14 @@
 #include "globals.h"
 #include "protocol.h"
 
+extern void cleanup();
+extern unsigned long get4();
+extern void transname(char *name, char *namebuf, int n);
+extern void xm_from();
+extern void give_wrfileopt();
+extern int wrfileopt();
+extern char *get_wrfileopt();
+extern void set_wrfileopt();
 extern int tgetc();
 extern int tgetrec();
 extern void tputc();
diff -Naur macutils.orig/comm/xm_to.c macutils/comm/xm_to.c
--- macutils.orig/comm/xm_to.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/comm/xm_to.c	2016-07-26 17:48:50.800729556 -0400
@@ -6,6 +6,7 @@
 #include "globals.h"
 #include "protocol.h"
 
+extern void cleanup();
 extern int tgetc();
 extern void tputc();
 extern void tputrec();
diff -Naur macutils.orig/crc/makecrc.c macutils/crc/makecrc.c
--- macutils.orig/crc/makecrc.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/crc/makecrc.c	2016-07-26 16:51:07.862934338 -0400
@@ -37,7 +37,7 @@
 
 static void initcrctab();
 
-main()
+int main(int argc, char **argv)
 {
     initcrctab("ccitt", 0x1021, 0xffff, 0, 16);
     initcrctab("kermit", 0x8408, 0, 1, 16);
diff -Naur macutils.orig/fileio/rdfile.c macutils/fileio/rdfile.c
--- macutils.orig/fileio/rdfile.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/fileio/rdfile.c	2016-07-26 17:54:58.750707797 -0400
@@ -1,3 +1,8 @@
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <strings.h>
+
 #include <stdio.h>
 #ifdef TYPES_H
 #include <sys/types.h>
@@ -42,13 +47,6 @@
 #define RSRC_FORMAT	2
 #define UNIX_FORMAT	3
 
-extern char *malloc();
-extern char *realloc();
-extern char *strcpy();
-extern char *strncpy();
-extern char *strcat();
-extern void exit();
-
 static void check_files();
 static void read_file();
 static void enter_dir();
@@ -937,8 +935,7 @@
     return ISFILE;
 }
 
-int rdfileopt(c)
-char c;
+int rdfileopt(char c)
 {
 extern char *optarg;
 char name[32];
diff -Naur macutils.orig/fileio/rdfileopt.h macutils/fileio/rdfileopt.h
--- macutils.orig/fileio/rdfileopt.h	1993-10-02 16:16:00.000000000 -0400
+++ macutils/fileio/rdfileopt.h	2016-07-26 17:55:10.056707128 -0400
@@ -1,4 +1,4 @@
-extern int rdfileopt();
+extern int rdfileopt(char c);
 extern void give_rdfileopt();
 extern void set_norecurse();
 extern char *get_rdfileopt();
diff -Naur macutils.orig/fileio/wrfile.c macutils/fileio/wrfile.c
--- macutils.orig/fileio/wrfile.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/fileio/wrfile.c	2016-07-26 16:51:07.834934340 -0400
@@ -1,3 +1,8 @@
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <strings.h>
+
 #ifdef TYPES_H
 #include <sys/types.h>
 #endif /* TYPES_H */
@@ -35,13 +40,6 @@
 #define MACI 9
 #endif /* SCAN */
 
-extern char *malloc();
-extern char *realloc();
-extern char *strcpy();
-extern char *strncpy();
-extern char *strcat();
-extern void exit();
-
 #ifdef UNDEF /* Do not declare sprintf; not portable (but lint will complain) */
 char *sprintf();
 #endif /* UNDEF */
@@ -802,12 +800,12 @@
 #endif /* APPLESHARE */
 }
 
-void set_wrfileopt(restricted)
+void set_wrfileopt(int restricted)
 {
     mode_restricted = restricted;
 }
 
-void set_s_wrfileopt(restricted)
+void set_s_wrfileopt(int restricted)
 {
     mode_s_restricted = restricted;
 }
diff -Naur macutils.orig/hexbin/dl.c macutils/hexbin/dl.c
--- macutils.orig/hexbin/dl.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/hexbin/dl.c	2016-07-26 16:52:49.438928331 -0400
@@ -121,7 +121,7 @@
 static int nextc()
 {
     while(*icp == 0) {
-	if(readline() == 0) {
+	if(readlin() == 0) {
 	    return EOF;
 	}
 	icp = &line[0];
diff -Naur macutils.orig/hexbin/globals.h macutils/hexbin/globals.h
--- macutils.orig/hexbin/globals.h	1993-10-02 16:16:00.000000000 -0400
+++ macutils/hexbin/globals.h	2016-07-26 17:00:38.894900570 -0400
@@ -13,7 +13,7 @@
 extern char info[];
 extern char trname[];
 
-typedef struct macheader {
+struct macheader {
 	char m_name[128];
 	char m_type[4];
 	char m_author[4];
diff -Naur macutils.orig/hexbin/hecx.c macutils/hexbin/hecx.c
--- macutils.orig/hexbin/hecx.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/hexbin/hecx.c	2016-07-26 16:52:54.543928029 -0400
@@ -104,7 +104,7 @@
 
     set_put(0);
     set_put(1);
-    while(!found_crc && readline()) {
+    while(!found_crc && readlin()) {
 	if(line[0] == 0) {
 	    continue;
 	}
@@ -155,7 +155,7 @@
 {
     register long nbytes = 0L;
 
-    while(readline()) {
+    while(readlin()) {
 	if(line[0] == 0) {
 	    continue;
 	}
diff -Naur macutils.orig/hexbin/hexbin.c macutils/hexbin/hexbin.c
--- macutils.orig/hexbin/hexbin.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/hexbin/hexbin.c	2016-07-26 17:27:05.668806735 -0400
@@ -1,3 +1,5 @@
+#include <unistd.h>
+
 #ifdef TYPES_H
 #include <sys/types.h>
 #endif /* TYPES_H */
@@ -294,7 +296,7 @@
     /*	or for "begin " */
     /*	dl format starts with a line containing only the symbols '@' to 'O',
 	or '|'. */
-    while(readline()) {
+    while(readlin()) {
 	llen = strlen(line);
 #ifdef HQX
 	if((strncmp(line, "(This file", 10) == 0) ||
@@ -329,7 +331,7 @@
 	    (void)fprintf(stderr, "Skip:%s\n", line);
 	}
     }
-    while(readline()) {
+    while(readlin()) {
 	switch (line[0]) {
 #ifdef HQX
 	case ':':
diff -Naur macutils.orig/hexbin/hqx.c macutils/hexbin/hqx.c
--- macutils.orig/hexbin/hqx.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/hexbin/hqx.c	2016-07-26 17:36:56.467771798 -0400
@@ -16,7 +16,7 @@
 static int getq();
 static long get2q();
 static long get4q();
-static getqbuf();
+static void getqbuf(char *buf, int n);
 
 static char *g_macname;
 
@@ -150,7 +150,7 @@
 		*out = 0;
 		(void)fprintf(stderr, "Skip:%s\n", line);
 	    }
-	    if(readline()) {
+	    if(readlin()) {
 		continue;
 	    } else {
 		break;
@@ -214,7 +214,7 @@
 	    }
 	} while(++in < out);
 	if(!stop) {
-	    if(!readline()) {
+	    if(!readlin()) {
 		break;
 	    }
 	}
@@ -380,9 +380,7 @@
 }
 
 /* getqbuf(); q format -- read n characters from input into buf */
-static getqbuf(buf, n)
-    char *buf;
-    int n;
+static void getqbuf(char *buf, int n)
 {
     int i;
 
diff -Naur macutils.orig/hexbin/mu.c macutils/hexbin/mu.c
--- macutils.orig/hexbin/mu.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/hexbin/mu.c	2016-07-26 16:53:11.549927024 -0400
@@ -53,7 +53,7 @@
     set_put(1);
     do_mu_fork();
     mh.m_datalen = data_size;
-    if(!readline()) {
+    if(!readlin()) {
 	(void)fprintf(stderr, "Premature EOF\n");
 #ifdef SCAN
 	do_error("hexbin: Premature EOF");
@@ -71,7 +71,7 @@
 	set_put(0);
 	do_mu_fork();
 	mh.m_rsrclen = rsrc_size;
-	if(!readline()) {
+	if(!readlin()) {
 	    (void)fprintf(stderr, "Premature EOF\n");
 #ifdef SCAN
 	    do_error("hexbin: Premature EOF");
@@ -95,7 +95,7 @@
 #endif /* SCAN */
 	exit(1);
     }
-    if(!readline()) {
+    if(!readlin()) {
 	(void)fprintf(stderr, "Premature EOF\n");
 #ifdef SCAN
 	do_error("hexbin: Premature EOF");
@@ -103,7 +103,7 @@
 	exit(1);
     }
     (void)mu_convert(line, info + I_TYPEOFF);
-    if(!readline()) {
+    if(!readlin()) {
 	(void)fprintf(stderr, "Premature EOF\n");
 #ifdef SCAN
 	do_error("hexbin: Premature EOF");
@@ -117,7 +117,7 @@
 #endif /* SCAN */
 	exit(1);
     }
-    if(!readline()) {
+    if(!readlin()) {
 	(void)fprintf(stderr, "Premature EOF\n");
 #ifdef SCAN
 	do_error("hexbin: Premature EOF");
@@ -147,7 +147,7 @@
 {
     long newbytes;
 
-    while(readline()) {
+    while(readlin()) {
 	if(line[0] == 0) {
 	    continue;
 	}
@@ -155,7 +155,7 @@
 	if(newbytes != 0) {
 	    continue;
 	}
-	if(!readline()) {
+	if(!readlin()) {
 	    (void)fprintf(stderr, "Premature EOF\n");
 #ifdef SCAN
 	    do_error("hexbin: Premature EOF");
diff -Naur macutils.orig/hexbin/printhdr.c macutils/hexbin/printhdr.c
--- macutils.orig/hexbin/printhdr.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/hexbin/printhdr.c	2016-07-26 17:30:03.293796231 -0400
@@ -33,7 +33,7 @@
 }
 
 /* print out header information in human-readable format */
-void print_header2(skip)
+void print_header2(int skip)
 {
     if(listmode) {
 	if(skip) {
diff -Naur macutils.orig/hexbin/readline.c macutils/hexbin/readline.c
--- macutils.orig/hexbin/readline.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/hexbin/readline.c	2016-07-26 16:54:59.245920655 -0400
@@ -6,7 +6,7 @@
 /* Read a line.  Allow termination by CR or LF or both.  Also allow for
    a non-terminated line at end-of-file.  Returns 1 if a line is read,
    0 otherwise. */
-int readline()
+int readlin(void)
 {
     int ptr = 0, c;
 
diff -Naur macutils.orig/hexbin/readline.h macutils/hexbin/readline.h
--- macutils.orig/hexbin/readline.h	1993-10-02 16:16:00.000000000 -0400
+++ macutils/hexbin/readline.h	2016-07-26 16:55:06.138920247 -0400
@@ -1,2 +1,3 @@
 extern char line[];
+int readlin(void);
 
diff -Naur macutils.orig/macunpack/arc.h macutils/macunpack/arc.h
--- macutils.orig/macunpack/arc.h	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/arc.h	2016-07-26 16:57:30.503911710 -0400
@@ -18,7 +18,7 @@
 #define	SIZE2		84	/* Not present if KIND == 1 */
 #define	HEADERBYTES	88
 
-typedef struct fileHdr { /* 84 or 88 bytes */
+struct fileHdr { /* 84 or 88 bytes */
 	char		magic1;
 	char		kind;
 	char		fname[31];
diff -Naur macutils.orig/macunpack/bin.c macutils/macunpack/bin.c
--- macutils.orig/macunpack/bin.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/bin.c	2016-07-26 16:51:07.844934339 -0400
@@ -1,3 +1,7 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
 #include "macunpack.h"
 #ifdef BIN
 #include "globals.h"
diff -Naur macutils.orig/macunpack/cpt.c macutils/macunpack/cpt.c
--- macutils.orig/macunpack/cpt.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/cpt.c	2016-07-26 17:26:35.886808496 -0400
@@ -1,3 +1,7 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
 #include "macunpack.h"
 #ifdef DD
 #ifndef CPT
@@ -21,9 +25,7 @@
 #define ESC1SEEN	1
 #define ESC2SEEN	2
 
-extern char *malloc();
-extern char *realloc();
-extern int free();
+extern int gethuffbyte(node *l_nodelist);
 
 static void cpt_uncompact();
 static unsigned char *cpt_data;
diff -Naur macutils.orig/macunpack/cpt.h macutils/macunpack/cpt.h
--- macutils.orig/macunpack/cpt.h	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/cpt.h	2016-07-26 16:57:44.985910854 -0400
@@ -31,7 +31,7 @@
 
 typedef long	OSType;
 
-typedef struct cptHdr {			/* 8 bytes */
+struct cptHdr {			/* 8 bytes */
 	unsigned char	signature;	/* = 1 -- for verification */
 	unsigned char	volume;		/* for multi-file archives */
 	unsigned short	xmagic;		/* verification multi-file consistency*/
@@ -42,7 +42,7 @@
 	unsigned char	commentsize;	/* number of bytes comment that follow*/
 };
 
-typedef struct fileHdr {		/* 78 bytes */
+struct fileHdr {		/* 78 bytes */
 	unsigned char	fName[32];	/* a STR32 */
 	unsigned char	folder;		/* set to 1 if a folder */
 	unsigned short	foldersize;	/* number of entries in folder */
diff -Naur macutils.orig/macunpack/dd.c macutils/macunpack/dd.c
--- macutils.orig/macunpack/dd.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/dd.c	2016-07-26 17:00:22.699901527 -0400
@@ -1,3 +1,7 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
 #include "macunpack.h"
 #ifdef DD
 #include "globals.h"
@@ -9,10 +13,6 @@
 #include "../util/masks.h"
 #include "../util/util.h"
 
-extern char *malloc();
-extern char *realloc();
-extern char *strcpy();
-extern char *strncpy();
 extern void cpt_wrfile1();
 extern void core_compress();
 extern void de_compress();
@@ -45,7 +45,7 @@
 #endif /* UNTESTED */
 static void dd_cpt_compat();
 
-typedef struct methodinfo {
+struct methodinfo {
 	char *name;
 	int number;
 };
diff -Naur macutils.orig/macunpack/dd.h macutils/macunpack/dd.h
--- macutils.orig/macunpack/dd.h	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/dd.h	2016-07-26 16:58:00.644909928 -0400
@@ -52,7 +52,7 @@
 
 typedef long OSType;
 
-typedef struct fileHdr {		/* 124 bytes */
+struct fileHdr {		/* 124 bytes */
 	unsigned char	magic[4];	/* "DDAR" */
 	unsigned char	fill1[4];	/* ??? */
 	unsigned char	fName[64];	/* a STR63 */
@@ -73,7 +73,7 @@
 	unsigned short	hdrcrc;		/* true crc */
 };
 
-typedef struct fileCHdr {		/* 84 bytes */
+struct fileCHdr {		/* 84 bytes */
 	unsigned char	magic[4];	/* "\253\315\000\124" */
 	unsigned long	dataLength;	/* lengths */
 	unsigned long	dataCLength;
diff -Naur macutils.orig/macunpack/de_huffman.c macutils/macunpack/de_huffman.c
--- macutils.orig/macunpack/de_huffman.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/de_huffman.c	2016-07-26 17:26:18.568809520 -0400
@@ -21,6 +21,7 @@
 #include "huffman.h"
 #include "../util/util.h"
 
+int gethuffbyte(node *l_nodelist);
 int (*get_bit)();
 int bytesread;
 /* 515 because StuffIt Classic needs more than the needed 511 */
@@ -121,8 +122,7 @@
     bit = 0;
 }
 
-int gethuffbyte(l_nodelist)
-node *l_nodelist;
+int gethuffbyte(node *l_nodelist)
 {
     register node *np;
 
diff -Naur macutils.orig/macunpack/dia.c macutils/macunpack/dia.c
--- macutils.orig/macunpack/dia.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/dia.c	2016-07-26 16:51:07.858934338 -0400
@@ -1,3 +1,7 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
 #include "macunpack.h"
 #ifdef DIA
 #include "globals.h"
@@ -9,9 +13,6 @@
 #include "../fileio/kind.h"
 #include "../util/util.h"
 
-extern char *malloc();
-extern char *realloc();
-
 static unsigned char *dia_archive;
 static int dia_archive_size;
 static int dia_max_archive_size;
diff -Naur macutils.orig/macunpack/dir.c macutils/macunpack/dir.c
--- macutils.orig/macunpack/dir.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/dir.c	2016-07-26 16:51:07.837934339 -0400
@@ -1,12 +1,13 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
 #include "globals.h"
 #include "../fileio/machdr.h"
 #include "../fileio/wrfile.h"
 #include "../util/util.h"
 #include "../util/masks.h"
 
-extern char *malloc();
-extern char *realloc();
-
 static char *dir_stack;
 static int dir_ptr = -64;
 static int dir_max;
diff -Naur macutils.orig/macunpack/jdw.h macutils/macunpack/jdw.h
--- macutils.orig/macunpack/jdw.h	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/jdw.h	2016-07-26 16:58:11.849909265 -0400
@@ -8,7 +8,7 @@
 #define	J_MTIME		34
 #define	J_FLENGTH	38
 
-typedef struct fileHdr {
+struct fileHdr {
 	char		magic[6];
 	unsigned long	type;
 	unsigned long	auth;
diff -Naur macutils.orig/macunpack/lzc.c macutils/macunpack/lzc.c
--- macutils.orig/macunpack/lzc.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/lzc.c	2016-07-26 16:51:07.850934339 -0400
@@ -1,3 +1,7 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
 #include "macunpack.h"
 #ifdef LZC
 #include "globals.h"
diff -Naur macutils.orig/macunpack/lzc.h macutils/macunpack/lzc.h
--- macutils.orig/macunpack/lzc.h	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/lzc.h	2016-07-26 16:58:14.539909106 -0400
@@ -12,7 +12,7 @@
 #define C_AUTHOFF	36
 #define C_FLAGOFF	40
 
-typedef struct fileHdr {
+struct fileHdr {
 	unsigned long	magic1;
 	unsigned long	dataLength;
 	unsigned long	dataCLength;
diff -Naur macutils.orig/macunpack/lzh.c macutils/macunpack/lzh.c
--- macutils.orig/macunpack/lzh.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/lzh.c	2016-07-26 17:00:03.358902671 -0400
@@ -1,3 +1,7 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
 #include "macunpack.h"
 #ifdef LZH
 #include "globals.h"
@@ -17,13 +21,11 @@
 #define LZSMASK		4095
 #define LZBUFFSIZE	8192	/* Max of above buffsizes */
 
-extern char *malloc();
-extern char *realloc();
 extern void de_lzah();
 extern unsigned char (*lzah_getbyte)();
 extern void de_lzh();
 
-typedef struct methodinfo {
+struct methodinfo {
 	char *name;
 	int number;
 };
diff -Naur macutils.orig/macunpack/lzh.h macutils/macunpack/lzh.h
--- macutils.orig/macunpack/lzh.h	2016-07-26 15:54:52.088133966 -0400
+++ macutils/macunpack/lzh.h	2016-07-26 16:58:19.748908798 -0400
@@ -30,7 +30,7 @@
 #define L_EEXTENDSZ	0
 #define L_EEXTEND	1
 
-typedef struct fileHdr { /* 58 bytes */
+struct fileHdr { /* 58 bytes */
 	unsigned char	hsize;
 	unsigned char	hcrc;
 	char		method[5];
diff -Naur macutils.orig/macunpack/macbinary.c macutils/macunpack/macbinary.c
--- macutils.orig/macunpack/macbinary.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/macbinary.c	2016-07-26 16:51:07.852934339 -0400
@@ -1,3 +1,7 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
 #include "macunpack.h"
 #include "globals.h"
 #include "../fileio/machdr.h"
diff -Naur macutils.orig/macunpack/macunpack.c macutils/macunpack/macunpack.c
--- macutils.orig/macunpack/macunpack.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/macunpack.c	2016-07-26 16:51:07.860934338 -0400
@@ -1,3 +1,7 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
 #include "macunpack.h"
 #include "globals.h"
 #include "../util/patchlevel.h"
diff -Naur macutils.orig/macunpack/pit.c macutils/macunpack/pit.c
--- macutils.orig/macunpack/pit.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/pit.c	2016-07-26 17:25:03.450813963 -0400
@@ -1,3 +1,7 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
 #include "macunpack.h"
 #ifdef PIT
 #include "../fileio/wrfile.h"
@@ -11,6 +15,7 @@
 #include "../util/util.h"
 #include "huffman.h"
 
+extern int getihuffbyte();
 extern void read_tree();
 extern void de_huffman();
 extern void set_huffman();
diff -Naur macutils.orig/macunpack/sit.c macutils/macunpack/sit.c
--- macutils.orig/macunpack/sit.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/sit.c	2016-07-26 16:59:50.894903408 -0400
@@ -1,3 +1,7 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
 #include "macunpack.h"
 #ifdef SIT
 #include "globals.h"
@@ -19,7 +23,7 @@
 extern void de_lzah();
 extern unsigned char (*lzah_getbyte)();
 
-typedef struct methodinfo {
+struct methodinfo {
 	char *name;
 	int number;
 };
diff -Naur macutils.orig/macunpack/sit.h macutils/macunpack/sit.h
--- macutils.orig/macunpack/sit.h	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/sit.h	2016-07-26 16:58:35.482907868 -0400
@@ -24,7 +24,7 @@
 
 typedef long OSType;
 
-typedef struct sitHdr {			/* 22 bytes */
+struct sitHdr {			/* 22 bytes */
 	OSType	signature;		/* = 'SIT!' -- for verification */
 	unsigned short	numFiles;	/* number of files in archive */
 	unsigned long	arcLength;	/* length of entire archive incl.
@@ -34,7 +34,7 @@
 	char reserved[7];
 };
 
-typedef struct fileHdr {		/* 112 bytes */
+struct fileHdr {		/* 112 bytes */
 	unsigned char	compRMethod;	/* rsrc fork compression method */
 	unsigned char	compDMethod;	/* data fork compression method */
 	unsigned char	fName[64];	/* a STR63 */
diff -Naur macutils.orig/macunpack/stf.c macutils/macunpack/stf.c
--- macutils.orig/macunpack/stf.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/stf.c	2016-07-26 16:51:07.846934339 -0400
@@ -1,3 +1,7 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
 #include "macunpack.h"
 #ifdef STF
 #include "stf.h"
diff -Naur macutils.orig/macunpack/stf.h macutils/macunpack/stf.h
--- macutils.orig/macunpack/stf.h	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/stf.h	2016-07-26 16:58:39.630907622 -0400
@@ -5,7 +5,7 @@
 #define	S_RSRCLNGTH	3	/* + NAMELENGTH */
 #define	S_DATALNGTH	7	/* + NAMELENGTH */
 
-typedef struct fileHdr {
+struct fileHdr {
 	char		magic[3];
 	char		flength;
 	char		fname[32];	/* actually flength */
diff -Naur macutils.orig/macunpack/zma.c macutils/macunpack/zma.c
--- macutils.orig/macunpack/zma.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/zma.c	2016-07-26 16:51:07.849934339 -0400
@@ -1,3 +1,7 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
 #include "macunpack.h"
 #ifdef ZMA
 #include "globals.h"
@@ -9,8 +13,6 @@
 #include "../util/masks.h"
 #include "../util/util.h"
 
-extern char *malloc();
-extern char *realloc();
 extern void de_lzh();
 
 /* We do allow for possible backpointing, so we allocate the archive in core */
diff -Naur macutils.orig/macunpack/zma.h macutils/macunpack/zma.h
--- macutils.orig/macunpack/zma.h	1993-10-02 16:16:00.000000000 -0400
+++ macutils/macunpack/zma.h	2016-07-26 16:58:44.491907335 -0400
@@ -20,7 +20,7 @@
 #define	Z_RCRC		44	/* Resource crc */
 #define	Z_FNAME		46	/* File name length and name */
 
-typedef struct fileHdr {		/* 78 bytes */
+struct fileHdr {		/* 78 bytes */
 	char		deleted;	/* Not in original, split off from: */
 	char		what;		/* What kind?  Negative if deleted */
 	unsigned char	hlen ;		/* Header length */
diff -Naur macutils.orig/mixed/dir.c macutils/mixed/dir.c
--- macutils.orig/mixed/dir.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/mixed/dir.c	2016-07-26 17:30:42.603793907 -0400
@@ -1,12 +1,11 @@
+#include <stdlib.h>
+
 #include "globals.h"
 #include "../fileio/machdr.h"
 #include "../fileio/wrfile.h"
 #include "../util/util.h"
 #include "../util/masks.h"
 
-extern char *malloc();
-extern char *realloc();
-
 static char *dir_stack;
 static int dir_ptr = -64;
 static int dir_max;
diff -Naur macutils.orig/mixed/macsave.c macutils/mixed/macsave.c
--- macutils.orig/mixed/macsave.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/mixed/macsave.c	2016-07-26 17:29:26.534798405 -0400
@@ -1,3 +1,6 @@
+#include <unistd.h>
+#include <stdlib.h>
+
 #include "globals.h"
 #include "../util/patchlevel.h"
 #include "../fileio/wrfile.h"
diff -Naur macutils.orig/mixed/macstream.c macutils/mixed/macstream.c
--- macutils.orig/mixed/macstream.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/mixed/macstream.c	2016-07-26 17:56:05.677703839 -0400
@@ -1,13 +1,13 @@
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
 #include "../fileio/machdr.h"
 #include "../fileio/rdfile.h"
 #include "../fileio/rdfileopt.h"
 #include "../util/patchlevel.h"
 
-extern char *malloc();
-extern char *realloc();
-extern char *strcat();
-extern void exit();
+extern int do_query();
 extern void transname();
 extern void do_indent();
 
diff -Naur macutils.orig/util/backtrans.c macutils/util/backtrans.c
--- macutils.orig/util/backtrans.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/util/backtrans.c	2016-07-26 16:51:07.782934343 -0400
@@ -54,8 +54,7 @@
 	0277, 0235, 0234, 0236, 0237,  '_',  '_', 0330};
 #endif /* LATIN1 */
 
-void backtrans(macname, name)
-char *macname, *name;
+void backtrans(char *macname, char *name)
 {
     char *in, *out;
     int c, count = 0;
diff -Naur macutils.orig/util/util.c macutils/util/util.c
--- macutils.orig/util/util.c	1993-10-02 16:16:00.000000000 -0400
+++ macutils/util/util.c	2016-07-26 16:51:07.782934343 -0400
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <unistd.h>
 #include "../fileio/fileglob.h"
 #include "masks.h"
 #include "util.h"
diff -Naur macutils.orig/util/util.h macutils/util/util.h
--- macutils.orig/util/util.h	1993-10-02 16:16:00.000000000 -0400
+++ macutils/util/util.h	2016-07-26 16:51:07.782934343 -0400
@@ -20,4 +20,5 @@
 extern real_time set_time();
 extern unsigned long tomactime();
 extern real_time frommactime();
+extern void backtrans(char *macname, char *name);