Add (#ifdef'ed by STARTUP_LOCALE) following line to crt0.c

(void) setlocale(LC_ALL, "");

It will be easiest way now to make national chars available
for all ctype-oriented programs at once by simple:

setenv LANG Your_National_Charset

Default case (without "LANG" environment
variable) will be fully ANSI compatible (got "C" locale).

If "LANG" variable present, extention becomes active.

Effect of this extention is great: in one time all ctype
oriented programs can accept/print national characters
without any touching source/binary code, it is big win, IMHO.

This method is fully compatible with ISO8859-* and russian koi8-r
too (in general -- with all 8-bit character sets). I think
it is very useful.
I got this idea from Xenix locale implementation.

This extention is even never compiled in, unless you set
	setenv STARTUP_LOCALE
before rebuilding crt0.c or corresponding variable in /etc/make.conf

lib/csu/i386/Makefile

@@ -1,7 +1,10 @@
 #	from: @(#)Makefile	5.6 (Berkeley) 5/22/91
-#	$Id: Makefile,v 1.9 1994/03/09 17:12:57 nate Exp $
+#	$Id: Makefile,v 1.10 1994/08/22 15:13:41 bde Exp $
 
 CFLAGS+=	-DLIBC_SCCS -DDYNAMIC
+.if defined(STARTUP_LOCALE)
+CFLAGS+=	-DSTARTUP_LOCALE
+.endif
 OBJS=		crt0.o gcrt0.o c++rt0.o
 CLEANFILES+=	a.out
 

lib/csu/i386/crt0.c

@@ -27,7 +27,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- *	$Id: crt0.c,v 1.8 1994/02/13 20:53:11 jkh Exp $
+ *	$Id: crt0.c,v 1.11 1994/08/05 17:53:07 wollman Exp $
  */
 
 
@@ -39,6 +39,9 @@ extern void exit();
 int _callmain();
 
 #include <sys/param.h>
+#ifdef STARTUP_LOCALE
+#include <locale.h>
+#endif
 
 #ifdef DYNAMIC
 #include <sys/types.h>
@@ -173,7 +176,10 @@ asm("eprol:");
 #ifdef MCRT0
 	atexit(_mcleanup);
 	monstartup(&eprol, &etext);
-#endif MCRT0
+#endif /* MCRT0 */
+#ifdef STARTUP_LOCALE
+	(void) setlocale(LC_ALL, "");
+#endif
 
 asm ("__callmain:");		/* Defined for the benefit of debuggers */
 	exit(main(kfp->kargc, argv, environ));