https://sourceforge.net/tracker/?func=detail&aid=3071706&group_id=13179&atid=113179

--- a/exp_clib.c
+++ b/exp_clib.c
@@ -15,6 +15,12 @@
 #endif
 #include <sys/types.h>
 #include <sys/ioctl.h>
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+#ifdef HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
 
 #ifdef TIME_WITH_SYS_TIME
 # include <sys/time.h>
--- a/exp_trap.c
+++ b/exp_trap.c
@@ -13,6 +13,7 @@
 #include <stdio.h>
 #include <signal.h>
 #include <sys/types.h>
+#include <string.h>
 
 #ifdef HAVE_SYS_WAIT_H
 #include <sys/wait.h>
--- a/pty_termios.c
+++ b/pty_termios.c
@@ -9,6 +9,8 @@
 
 #include <stdio.h>
 #include <signal.h>
+#include <string.h>
+#include <pty.h>
 
 #if defined(SIGCLD) && !defined(SIGCHLD)
 #define SIGCHLD SIGCLD
@@ -100,6 +100,7 @@
 
 #include "exp_tty_in.h"
 #include "exp_rename.h"
+#include "exp_int.h"
 #include "exp_pty.h"
 
 void expDiagLog();
--- a/exp_chan.c
+++ b/exp_chan.c
@@ -34,6 +34,7 @@
 #include "exp_rename.h"
 #include "exp_prog.h"
 #include "exp_command.h"
+#include "exp_event.h"
 #include "exp_log.h"
 #include "tcldbg.h" /* Dbg_StdinMode */
 
--- a/exp_clib.c
+++ b/exp_clib.c
@@ -1955,6 +1955,7 @@
 
 #include "expect.h"
 #include "exp_int.h"
+EXTERN void		exp_init_tty _ANSI_ARGS_((void));
 
 /* exp_glob.c - expect functions for doing glob
  *
--- a/exp_tty.h
+++ b/exp_tty.h
@@ -17,6 +17,7 @@
 
 void exp_tty_raw(int set);
 void exp_tty_echo(int set);
+int exp_tty_cooked_echo(Tcl_Interp *interp, exp_tty *tty_old, int *was_raw, int *was_echo);
 void exp_tty_break(Tcl_Interp *interp, int fd);
 int exp_tty_raw_noecho(Tcl_Interp *interp, exp_tty *tty_old, int *was_raw, int *was_echo);
 int exp_israw(void);
--- a/exp_main_tk.c
+++ b/exp_main_tk.c
@@ -32,6 +32,7 @@
 static char sccsid[] = "@(#) tkAppInit.c 1.19 95/12/23 17:09:24";
 #endif /* not lint */
 
+#include <string.h>
 #include <ctype.h>
 
 #include "tk.h"