===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/m4/m4.1,v
retrieving revision 1.50
retrieving revision 1.51
diff -u -r1.50 -r1.51
--- src/usr.bin/m4/m4.1	2007/05/31 19:20:12	1.50
+++ src/usr.bin/m4/m4.1	2008/08/16 12:21:46	1.51
@@ -1,4 +1,4 @@
-.\"	@(#) $OpenBSD: m4.1,v 1.50 2007/05/31 19:20:12 jmc Exp $
+.\"	@(#) $OpenBSD: m4.1,v 1.51 2008/08/16 12:21:46 espie Exp $
 .\"
 .\" Copyright (c) 1989, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -30,7 +30,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: May 31 2007 $
+.Dd $Mdocdate: August 16 2008 $
 .Dt M4 1
 .Os
 .Sh NAME
@@ -138,7 +138,11 @@
 In this mode, translit handles simple character
 ranges (e.g., a-z), regular expressions mimic emacs behavior,
 multiple m4wrap calls are handled as a stack,
-and the number of diversions is unlimited.
+the number of diversions is unlimited,
+empty names for macro definitions are allowed,
+and eval understands 
+.Sq 0rbase:value 
+numbers.
 .It Fl I Ar "dirname"
 Add directory
 .Ar dirname
@@ -268,9 +272,9 @@
 .Fa arg1
 and following arguments, in a way similar to
 .Xr printf 3 .
-This built-in is only available in GNU-m4 compatibility mode, and the
-left-padding flag, an optional field width and the %s data type
-are the only supported parameters.
+This built-in is only available in GNU-m4 compatibility mode, and the only
+parameters implemented are there for autoconf compatibility:
+left-padding flag, an optional field width, a maximum field width, *-specified field widths, and the %s and %c data type.
 .It Fn ifdef name yes no
 If the macro named by the first argument is defined then return the second
 argument, otherwise the third.