if we don't have setlocale(), just look at the env vars ourselves

Build.sh

@@ -1,5 +1,5 @@
 #!/bin/sh
-srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.317 2008/05/04 01:51:28 tg Exp $'
+srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.318 2008/05/04 01:58:14 tg Exp $'
 #-
 # Environment used: CC CFLAGS CPPFLAGS LDFLAGS LIBS NOWARN NROFF TARGET_OS
 # CPPFLAGS recognised:	MKSH_SMALL MKSH_ASSUME_UTF8 MKSH_NOPWNAM MKSH_NOVI
@@ -830,7 +830,7 @@ if test 0 = $HAVE_MKSH_FULL; then
 		ac_flags 1 fnoinline -fno-inline
 	fi
 
-	: ${HAVE_MKNOD=0} ${HAVE_SETLOCALE_CTYPE=0}
+	: ${HAVE_MKNOD=0}
 	check_categories=$check_categories,smksh
 fi
 
@@ -1070,7 +1070,7 @@ ac_test setgroups setresugid 0 <<-'EOF'
 	int main(void) { gid_t gid = 0; return (setgroups(0, &gid)); }
 EOF
 
-ac_test strcasestr setlocale_ctype 1 <<-'EOF'
+ac_test strcasestr <<-'EOF'
 	#include <stddef.h>
 	#include <string.h>
 	int main(int ac, char *av[]) {

main.c

@@ -13,7 +13,7 @@
 #include <locale.h>
 #endif
 
-__RCSID("$MirOS: src/bin/mksh/main.c,v 1.95 2008/04/01 20:40:21 tg Exp $");
+__RCSID("$MirOS: src/bin/mksh/main.c,v 1.96 2008/05/04 01:58:14 tg Exp $");
 
 extern char **environ;
 
@@ -285,22 +285,29 @@ main(int argc, const char *argv[])
 	/* Do this after j_init(), as tty_fd is not initialised 'til then */
 	if (Flag(FTALKING)) {
 #ifndef MKSH_ASSUME_UTF8
-#if HAVE_SETLOCALE_CTYPE
 #define isuc(x)	(((x) != NULL) && \
 		    (stristr((x), "UTF-8") || stristr((x), "utf8")))
 		/* Check if we're in a UTF-8 locale */
 		if (!Flag(FUTFHACK)) {
 			const char *ccp;
 
+#if HAVE_SETLOCALE_CTYPE
 			ccp = setlocale(LC_CTYPE, "");
 #if HAVE_LANGINFO_CODESET
 			if (!isuc(ccp))
 				ccp = nl_langinfo(CODESET);
+#endif
+#else
+			ccp = getenv("LC_ALL");
+			if (!ccp || !*ccp) {
+				ccp = getenv("LC_CTYPE");
+				if (!ccp || !*ccp)
+					ccp = getenv("LANG");
+			}
 #endif
 			Flag(FUTFHACK) = isuc(ccp);
 		}
 #undef isuc
-#endif
 #else
 		Flag(FUTFHACK) = 1;
 #endif

mksh.1

@@ -1,4 +1,4 @@
-.\" $MirOS: src/bin/mksh/mksh.1,v 1.124 2008/05/04 01:51:30 tg Exp $
+.\" $MirOS: src/bin/mksh/mksh.1,v 1.125 2008/05/04 01:58:15 tg Exp $
 .\" $OpenBSD: ksh.1,v 1.121 2008/03/21 12:51:19 millert Exp $
 .\"-
 .\" Try to make GNU groff and AT&T nroff more compatible
@@ -3422,6 +3422,12 @@ This is enabled automatically for interactive shells if your system supports
 .Fn setlocale LC_CTYPE \&""
 and optionally
 .Fn nl_langinfo CODESET ,
+or the
+.Ev LC_ALL ,
+.Ev LC_CTYPE ,
+or
+.Ev LANG
+environment variables,
 and at least one of these returns something that matches
 .Dq UTF\-8
 or