diff -ru tcsh-6.23.02.orig/config_f.h tcsh-6.23.02/config_f.h

--- tcsh-6.23.02.orig/config_f.h        2022-01-03 09:03:03.000000000 +0100

+++ tcsh-6.23.02/config_f.h     2022-02-01 11:36:23.327968800 +0100

@@ -149,7 +149,7 @@

  *             This can be much slower and no memory statistics will be

  *             provided.

  */

-#if defined(__MACHTEN__) || defined(PURIFY) || defined(MALLOC_TRACE) || defined(_OSD_POSIX) || defined(__MVS__) || defined (__CYGWIN__) || defined(__GLIBC__) || defined(__OpenBSD__) || defined(__APPLE__) || defined (__ANDROID__) || defined(__NetBSD__)

+#if defined(__MACHTEN__) || defined(PURIFY) || defined(MALLOC_TRACE) || defined(_OSD_POSIX) || defined(__MVS__) || defined (__CYGWIN__) || defined(__GLIBC__) || defined(__OpenBSD__) || defined(__APPLE__) || defined (__ANDROID__) || defined(__NetBSD__) || defined(__midipix__)

 # define SYSMALLOC

 #else

 # undef SYSMALLOC

diff -Nru tcsh-6.22.00.orig/config/midipix tcsh-6.22.00/config/midipix

--- tcsh-6.22.00.orig/config/midipix	1970-01-01 01:00:00.000000000 +0100

+++ tcsh-6.22.00/config/midipix	2020-08-21 19:12:56.066600827 +0200

@@ -0,0 +1,138 @@

+/*

+ * config.h -- configure various defines for tcsh

+ *

+ * All source files should #include this FIRST.

+ *

+ * This is the config file for midipix systems

+ */

+

+#ifndef _h_config

+#define _h_config

+/****************** System dependant compilation flags ****************/

+/*

+ * POSIX	This system supports IEEE Std 1003.1-1988 (POSIX).

+ */

+#define POSIX

+

+/*

+ * POSIXJOBS	This system supports the optional IEEE Std 1003.1-1988 (POSIX)

+ *		job control facilities.

+ */

+#define POSIXJOBS

+

+/*

+ * VFORK	This machine has a vfork().  

+ *		It used to be that for job control to work, this define

+ *		was mandatory. This is not the case any more.

+ *		If you think you still need it, but you don't have vfork, 

+ *		define this anyway and then do #define vfork fork.  

+ *		I do this anyway on a Sun because of yellow pages brain damage,

+ *		[should not be needed under 4.1]

+ *		and on the iris4d cause	SGI's fork is sufficiently "virtual" 

+ *		that vfork isn't necessary.  (Besides, SGI's vfork is weird).

+ *		Note that some machines eg. rs6000 have a vfork, but not

+ *		with the berkeley semantics, so we cannot use it there either.

+ */

+#undef VFORK

+

+/*

+ * BSDJOBS	You have BSD-style job control (both process groups and

+ *		a tty that deals correctly

+ */

+#define BSDJOBS

+

+/*

+ * BSDTIMES	You have BSD-style process time stuff (like rusage)

+ *		This may or may not be true.  For example, Apple Unix

+ *		(OREO) has BSDJOBS but not BSDTIMES.

+ */

+#define BSDTIMES

+

+/*

+ * BSDLIMIT	You have BSD-style resource limit stuff (getrlimit/setrlimit)

+ */

+#define BSDLIMIT

+

+/*

+ * TERMIO	You have struct termio instead of struct sgttyb.

+ * 		This is usually the case for SVID systems, where

+ *		BSD uses sgttyb. POSIX systems should define this

+ *		anyway, even though they use struct termios.

+ */

+#define TERMIO

+

+/*

+ * SYSVREL	Your machine is SYSV based (HPUX, A/UX)

+ *		NOTE: don't do this if you are on a Pyramid -- tcsh is

+ *		built in a BSD universe.

+ *		Set SYSVREL to 1, 2, 3, or 4, depending the version of System V

+ *		you are running. Or set it to 0 if you are not SYSV based

+ *

+ *		Note: Linux should work with any SYSVREL < 3.

+ */

+#define SYSVREL	2

+

+/*

+ * YPBUGS	Work around Sun YP bugs that cause expansion of ~username

+ *		to send command output to /dev/null

+ */

+#undef YPBUGS

+

+/*

+ * Get the name space we want.

+ *

+ * The more recent defaults for gcc (e.g. on Red Hat 7.0)

+ * also define _POSIX_C_SOURCE, which throws our code off.

+ */

+

+#define __STRICT_ANSI__

+#ifndef _BSD_SOURCE

+# define _BSD_SOURCE

+#endif

+#ifndef _SVID_SOURCE

+# define _SVID_SOURCE

+#endif

+#ifndef _POSIX_SOURCE

+# define _POSIX_SOURCE

+#endif

+#ifndef _XOPEN_SOURCE

+# define _XOPEN_SOURCE 500

+#endif

+#ifndef _GNU_SOURCE

+# define _GNU_SOURCE

+#endif

+

+/*

+ * Large file support from <features.h>

+ */

+

+#ifndef _LARGEFILE_SOURCE

+# define _LARGEFILE_SOURCE

+#endif

+#ifndef _LARGEFILE64_SOURCE

+# define _LARGEFILE64_SOURCE

+#endif

+#ifndef _FILE_OFFSET_BITS

+# define _FILE_OFFSET_BITS 64

+#endif

+

+/****************** local defines *********************/

+#ifndef _PATH_TCSHELL

+#define _PATH_TCSHELL "/bin/tcsh"

+#endif

+#define ECHO_STYLE      BOTH_ECHO

+

+#if !defined(SYSMALLOC)

+# define SYSMALLOC

+#endif

+#if !defined(NISPLUS)

+# define NISPLUS

+#endif

+#if !defined(POSIX)

+# define POSIX

+#endif

+

+/* midipix allows paths prepended with double slashes (network paths). */

+#define HAVE_SLASHSLASH 1

+

+#endif /* _h_config */

diff -Nru tcsh-6.22.00.orig/configure tcsh-6.22.00/configure

--- tcsh-6.22.00.orig/configure	2019-11-28 17:00:05.000000000 +0100

+++ tcsh-6.22.00/configure	2020-08-21 19:08:03.600976202 +0200

@@ -2975,6 +2975,11 @@

     tcsh_config_file=qnx6

   ;;

+  ## midipix

+  *-midipix*)

+    tcsh_config_file=midipix

+  ;;

+

   * )

     as_fn_error $? "Tcsh can't guess the configuration file name

 for \`${host}' systems.

diff -Nru tcsh-6.22.00.orig/ed.inputl.c tcsh-6.22.00/ed.inputl.c

--- tcsh-6.22.00.orig/ed.inputl.c	2019-11-28 17:00:05.000000000 +0100

+++ tcsh-6.22.00/ed.inputl.c	2020-08-21 19:22:12.899460169 +0200

@@ -34,6 +34,8 @@

 #include "ed.defns.h"		/* for the function names */

 #include "tw.h"			/* for twenex stuff */

+#include <wchar.h>

+

 #define OKCMD INT_MAX

 /* ed.inputl -- routines to get a single line from the input. */

diff -Nru tcsh-6.22.00.orig/Makefile.in tcsh-6.22.00/Makefile.in

--- tcsh-6.22.00.orig/Makefile.in	2019-11-28 17:00:05.000000000 +0100

+++ tcsh-6.22.00/Makefile.in	2020-08-21 19:28:01.686381892 +0200

@@ -339,6 +339,7 @@

 #CC=	cc	-h0,ansi,novector,float0

 #CC=	lcc	-wa 

 CC_FOR_GETHOST = @CC_FOR_GETHOST@

+CPPFLAGS_FOR_GETHOST=-I. -I$(srcdir)

 ED=	ed

 AS=	as

 RM=	rm

@@ -447,7 +448,7 @@

 gethost:  gethost.c sh.err.h tc.const.h sh.h

 	rm -f gethost

-	${CC_FOR_GETHOST} -o gethost ${CPPFLAGS} ${CFLAGS} ${LDFLAGS} $(srcdir)/gethost.c

+	${CC_FOR_GETHOST} -o gethost ${CPPFLAGS_FOR_GETHOST} ${CFLAGS_FOR_GETHOST} ${LDFLAGS_FOR_GETHOST} $(srcdir)/gethost.c

 tc.defs.c:	gethost host.defs

 	@rm -f $@.tmp

diff -Nru tcsh-6.22.00.orig/sh.h tcsh-6.22.00/sh.h

--- tcsh-6.22.00.orig/sh.h	2019-11-28 17:00:05.000000000 +0100

+++ tcsh-6.22.00/sh.h	2020-08-21 19:10:44.030604961 +0200

@@ -337,7 +337,7 @@

 #endif /* POSIX && !WINNT_NATIVE */

 #include <limits.h>

-#if SYSVREL > 0 || defined(_IBMR2) || defined(_MINIX) || defined(__linux__) || defined(__GNU__) || defined(__GLIBC__)

+#if SYSVREL > 0 || defined(_IBMR2) || defined(_MINIX) || defined(__linux__) || defined(__GNU__) || defined(__GLIBC__) || defined(__midipix__)

 # if !defined(pyr) && !defined(stellar)

 #  include <time.h>

 #  ifdef _MINIX