diff -rN -u old-working/unix_version/source/hypoe.c new-working/unix_version/source/hypoe.c
--- old-working/unix_version/source/hypoe.c	2007-06-25 08:11:55.114086707 +0800
+++ new-working/unix_version/source/hypoe.c	2007-06-25 08:11:56.268911147 +0800
@@ -10,6 +10,8 @@
 #define BACKUP_TYPE     'q'
 
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include "sockets.h"
 
 /* BEGIN Hypoe.c */
@@ -43,14 +45,13 @@
   int  i, process_input();
   int  mode=1;              /* initial toggle: 1 first time, 2 other times */
   char filename[MAX_PATH];
-  char *strcpy();
   FILE * fileptr;
    
   /* Network socket related declarations */
-  int fd, listen_ok, strcmp();
+  int fd, listen_ok;
   int setup_server_socket(), listen_server_socket();
   char tcp_service[MAX_STRING], last_string[MAX_STRING];
-  char *status, *fdgetstr(), *strcpy();
+  char *status, *fdgetstr();
   unsigned alarm_seconds=ALARM_SECONDS, set_alarm();
 
   f_init();
@@ -223,7 +224,7 @@
   int mode_arg, socket_arg;
   char *filename;
 {
-  int mode, status, strlen(), rename_arc();
+  int mode, status, rename_arc();
   void initial_(), input1_(), lissum_(), locate_(), cleanup_();
 
   mode = mode_arg;
@@ -329,8 +330,8 @@
 int rename_arc (old_filename)
   char *old_filename;
 {
-  int length, strlen(), rename();
-  char new_filename[MAX_PATH], *strcpy();
+  int length, rename();
+  char new_filename[MAX_PATH];
 
   (void) strcpy (new_filename, old_filename);
 
diff -rN -u old-working/unix_version/source/listen_serv.c new-working/unix_version/source/listen_serv.c
--- old-working/unix_version/source/listen_serv.c	2007-06-25 08:11:55.114086707 +0800
+++ new-working/unix_version/source/listen_serv.c	2007-06-25 08:11:56.305905523 +0800
@@ -25,10 +25,9 @@
   int sd;
 {
   struct sockaddr_in client_sockaddr;
-  struct hostent *client_hostent, *gethostbyaddr();
-  int fd, listen(), accept();
+  struct hostent *client_hostent;
+  int fd;
   int  addrlen = sizeof(struct sockaddr_in);
-  char *inet_ntoa();
 
   /* Allow incomming connections to the socket and set */
   /* up a "backlog" (queue) for multiple connections. */
@@ -44,7 +43,8 @@
   /* Block until some client is "connect"ed (unless FNDELAY */
   /* non-blocking is set), then get a file descriptor. */
   do {
-    if ((fd = accept(sd, &client_sockaddr, &addrlen)) < 0) {
+     /* note: must typecast the pointer of client_sockaddr, for correctness */
+    if ((fd = accept(sd, (struct sockaddr *)&client_sockaddr, &addrlen)) < 0) {
       if (errno == EWOULDBLOCK) return (-2);
       else if (errno != 4) {
         perror("listen_server_socket:accept");
diff -rN -u old-working/unix_version/source/makefile new-working/unix_version/source/makefile
--- old-working/unix_version/source/makefile	2007-06-25 08:11:55.101088683 +0800
+++ new-working/unix_version/source/makefile	2007-06-25 08:11:56.305905523 +0800
@@ -3,7 +3,7 @@
 # For solaris use the following lines:
 FC= f77 -C -O
 CC= cc -O
-CLIBS = -lsocket -lnsl
+CLIBS = -lnsl
 
 # For OS 4.1.* use the following lines:
 #FC= f77 -C -O  -DSUN
@@ -11,7 +11,7 @@
 #CLIBS = -lF77 -lm
 
 # OBJS_XPICK are required for running hypoellipse with xpick.
-OBJS_XPICK =	Hypoe.o\
+OBJS_XPICK =	hypoe.o\
 	cleanup.o\
 	fdgetstr.o\
 	initial.o\
diff -rN -u old-working/unix_version/source/setup_server.c new-working/unix_version/source/setup_server.c
--- old-working/unix_version/source/setup_server.c	2007-06-25 08:11:55.101088683 +0800
+++ new-working/unix_version/source/setup_server.c	2007-06-25 08:11:56.069941395 +0800
@@ -19,6 +19,7 @@
 /********************************************************************/
 
 #include <stdio.h>
+#include <string.h>
 #include "sockets.h"
 
 int setup_server_socket (tcp_service)
@@ -27,9 +28,8 @@
 
   extern char *program_name;
   struct sockaddr_in socket_name;
-  struct servent *getsevbyname(), *server_ptr;
+  struct servent *server_ptr;
   struct hostent *host_entry;
-  int gethostname(), socket(), bind(), listen();
 
   char this_host[MAX_HOST_LENGTH];
   char *inet_ntoa(), *char_ptr;
@@ -83,7 +83,8 @@
 
   /* Request that a name be assigned to the socket */
   sockname_len = sizeof(socket_name);
-  if (bind(sd, &socket_name, sockname_len) < 0) {
+  /* Note: must typecast pointer of socket_name */
+  if (bind(sd, (struct sockaddr *)&socket_name, sockname_len) < 0) {
     fprintf (stderr, "%s:\t", program_name);
     perror("setup_socket_server:bind");
     return(-1);
diff -rN -u old-working/unix_version/uamag/squish_uacal.c new-working/unix_version/uamag/squish_uacal.c
--- old-working/unix_version/uamag/squish_uacal.c	2007-06-25 08:11:55.267063451 +0800
+++ new-working/unix_version/uamag/squish_uacal.c	2007-06-25 08:11:56.423887587 +0800
@@ -1,10 +1,12 @@
 #include <stdio.h>
-void squish_uacal_ (old_string, new_string, old_length, new_length)
+#include <string.h>
+
+void squish_uacal__ (old_string, new_string, old_length, new_length)
   char old_string[], new_string[];
   int old_length, new_length;
 {
-  int i, j, k, max_i, is_float, strlen();
-  char decimal_string[20], *strcpy();
+  int i, j, k, max_i, is_float;
+  char decimal_string[20];
 
   i = j = 0;
   max_i = strlen(old_string);