--- a/Imakefile
+++ b/Imakefile
@@ -23,6 +23,11 @@
     PUCCPTYDDEF = -DPUCC_PTYD		/* does not need to be setuid */
          PTYLIB = -lpucc
 #endif
+#ifdef LinuxArchitecture
+         PTYLIB = -lutil
+#undef InstallXtermSetUID
+#define InstallXtermSetUID 0
+#endif
 
  OSMAJORVERSION = OSMajorVersion
  OSMINORVERSION = OSMinorVersion
--- a/button.c
+++ b/button.c
@@ -41,8 +41,6 @@
 #include "error.h"
 #include "menu.h"
 
-extern char *malloc();
-
 extern void DoSecureKeyboard();
 
 #define KeyState(x) (((x) & (ShiftMask|ControlMask)) + (((x) & Mod1Mask) ? 2 : 0))
--- a/charproc.c
+++ b/charproc.c
@@ -102,8 +102,6 @@
 extern XtAppContext app_con;
 extern Widget toplevel;
 extern void exit();
-extern char *malloc();
-extern char *realloc();
 extern fd_set Select_mask;
 extern fd_set X_mask;
 extern fd_set pty_mask;
--- a/main.c
+++ b/main.c
@@ -143,6 +143,7 @@
 #define HAS_UTMP_UT_HOST
 #define LASTLOG
 #define WTMP
+#include <pty.h>
 #endif
 
 #include <sys/ioctl.h>
@@ -1871,7 +1872,7 @@
 get_pty (pty)
     int *pty;
 {
-#ifdef __osf__
+#if defined(__osf__) || defined(linux)
     int tty;
     return (openpty(pty, &tty, ttydev, NULL, NULL));
 #endif