diff -cr diff-1.14.orig/Makefile diff-1.14/Makefile
*** diff-1.14.orig/Makefile	Mon Feb 19 03:11:31 1990
--- diff-1.14/Makefile	Sat Dec  1 05:21:51 1990
***************
*** 22,28 ****
  # but gcc makes it faster.
  # Also, gcc supports -O and -g together.
  CC=gcc -O
! CFLAGS = -g
  INSTALL = install
  
  # On system V, enable these three lines:
--- 22,28 ----
  # but gcc makes it faster.
  # Also, gcc supports -O and -g together.
  CC=gcc -O
! CFLAGS = -DUSG -DMINIX
  INSTALL = install
  
  # On system V, enable these three lines:
***************
*** 36,42 ****
  # Add -DHAVE_DIRECT to CFLAGS if your system uses 'struct direct' instead of
  # 'struct dirent' (this is the case at least with one add-on ndir library).
  
! bindir=/usr/local/bin
  prefix=
  
  # All source files
--- 36,42 ----
  # Add -DHAVE_DIRECT to CFLAGS if your system uses 'struct direct' instead of
  # 'struct dirent' (this is the case at least with one add-on ndir library).
  
! bindir=/usr/gnu/bin
  prefix=
  
  # All source files
diff -cr diff-1.14.orig/diff.h diff-1.14/diff.h
*** diff-1.14.orig/diff.h	Fri Feb 23 15:55:15 1990
--- diff-1.14/diff.h	Sat Dec  1 05:27:31 1990
***************
*** 47,53 ****
--- 47,57 ----
  #define bcmp(s1,s2,n)	memcmp((s1),(s2),(n))
  #define bzero(s,n)	memset((s),0,(n))
  
+ #ifdef MINIX
+ #define dup2(f,t)	(-1)
+ #else
  #define dup2(f,t)	(close(t),fcntl((f),F_DUPFD,(t)))
+ #endif
  
  #define vfork	fork
  #define index	strchr
***************
*** 292,298 ****
  
  /* Describe the two files currently being compared.  */
  
! struct file_data files[2];
  
  /* Queue up one-line messages to be printed at the end,
     when -l is specified.  Each message is recorded with a `struct msg'.  */
--- 296,302 ----
  
  /* Describe the two files currently being compared.  */
  
! extern struct file_data files[2];
  
  /* Queue up one-line messages to be printed at the end,
     when -l is specified.  Each message is recorded with a `struct msg'.  */
diff -cr diff-1.14.orig/diff3.c diff-1.14/diff3.c
*** diff-1.14.orig/diff3.c	Fri Feb 23 15:57:34 1990
--- diff-1.14/diff3.c	Sat Dec  1 05:23:19 1990
***************
*** 39,45 ****
--- 39,49 ----
  #define bcmp(s1,s2,n)	memcmp((s1),(s2),(n))
  #define bzero(s,n)	memset((s),0,(n))
  
+ #ifdef MINIX
+ #define dup2(f,t)	(-1)
+ #else
  #define dup2(f,t)	(close(t),fcntl((f),F_DUPFD,(t)))
+ #endif
  
  #define vfork	fork
  #define index	strchr
diff -cr diff-1.14.orig/io.c diff-1.14/io.c
*** diff-1.14.orig/io.c	Sun Dec 24 16:03:12 1989
--- diff-1.14/io.c	Sat Dec  1 05:27:44 1990
***************
*** 25,30 ****
--- 25,31 ----
  
  /* Given a hash value and a new character, return a new hash value. */
  #define HASH(h, c) ((c) + ROL (h, 7))
+ struct file_data files[2];
  
  /* Current file under consideration. */
  struct file_data *current;
diff -cr diff-1.14.orig/util.c diff-1.14/util.c
*** diff-1.14.orig/util.c	Fri Feb 23 15:56:13 1990
--- diff-1.14/util.c	Sat Dec  1 05:24:05 1990
***************
*** 147,153 ****
--- 147,155 ----
  	{
  	  close (pipes[1]);
  	  close (fileno (stdin));
+ #ifndef MINIX
  	  if (dup2 (pipes[0], fileno (stdin)) < 0)
+ #endif
  	    pfatal_with_name ("dup2");
  	  close (pipes[0]);