komh reports that OS/2 has no chance of supporting UTF-8 (like MSYS)

Build.sh

@@ -1,5 +1,5 @@
 #!/bin/sh
-srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.712 2017/04/02 15:00:39 tg Exp $'
+srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.713 2017/04/03 02:08:56 tg Exp $'
 #-
 # Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
 #		2011, 2012, 2013, 2014, 2015, 2016, 2017
@@ -860,6 +860,7 @@ OpenBSD)
 	: "${HAVE_SETLOCALE_CTYPE=0}"
 	;;
 OS/2)
+	add_cppflags -DMKSH_ASSUME_UTF8=0; HAVE_ISSET_MKSH_ASSUME_UTF8=1
 	HAVE_TERMIOS_H=0
 	HAVE_MKNOD=0	# setmode() incompatible
 	oswarn="; it is being ported"

check.t

@@ -1,4 +1,4 @@
-# $MirOS: src/bin/mksh/check.t,v 1.768 2017/04/02 16:25:20 tg Exp $
+# $MirOS: src/bin/mksh/check.t,v 1.769 2017/04/03 02:08:57 tg Exp $
 # -*- mode: sh -*-
 #-
 # Copyright © 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
@@ -8263,7 +8263,7 @@ description:
 	-UMKSH_ASSUME_UTF8 => not expected, but if your OS is old,
 	 try passing HAVE_SETLOCALE_CTYPE=0 to Build.sh
 need-pass: no
-category: !os:hpux,!os:msys
+category: !os:hpux,!os:msys,!os:os2
 need-ctty: yes
 arguments: !-i!
 env-setup: !PS1=!PS2=!LC_CTYPE=en_US.UTF-8!