Turned the shell script into a binary fixing several minor buglets.

Mention _POSIX_SOURCE feature test macro in man page.
PR:		bin/19337
Submitted by:	myself way back when I was a nobody :-) (schweikh)
Reviewed by:	joerg, bde
MFC after:	2 weeks

usr.bin/c89/Makefile

@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-SCRIPTS=c89.sh
+PROG=	c89
 MAN=	c89.1
 
 .include <bsd.prog.mk>

usr.bin/c89/c89.1

@@ -34,8 +34,8 @@
 .Sh SYNOPSIS
 .Nm
 .Op Fl c
-.Op Fl D Ar name Ns Op Ar =value 
-.Op ...\&
+.Op Fl D Ar name Ns Op Ar =value
+.Ar ...\&
 .Op Fl E
 .Op Fl g
 .Op Fl I Ar directory ...\&
@@ -63,7 +63,12 @@ Define name as if by a C-language
 directive.  If
 no
 .Ar =value
-is given, a value of 1 will be used.  The
+is given, a value of 1 will be used. Note that in order to request a
+translation as specified by
+.St -p1003.2
+you need to define
+.Dv _POSIX_SOURCE
+either in the source or using this option.  The
 .Fl D
 option has lower precedence than the
 .Fl U

usr.bin/c89/c89.sh

@@ -1,73 +0,0 @@
-#!/bin/sh
-#
-# Copyright (c) 1997 Joerg Wunsch
-#
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-#
-# THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
-# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
-# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
-# IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
-# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
-# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
-# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#
-# $FreeBSD$
-#
-# This is the Posix.2 mandated C compiler.  Basically, a hook to the
-# cc(1) command.
-
-usage()
-{
-	echo "usage: c89 [-c] [-D name[=value]] [...] [-E] [-g] [-I directory ...]
-       [-L directory ...] [-o outfile] [-O] [-s] [-U name ...] operand ..." 1>&2
-	exit 64
-}
-
-_PARAMS="$@"
-
-while getopts "cD:EgI:L:o:OsU:" opt
-do
-	case $opt in
-	[cDEgILoOsU])
-		;;
-	*)
-		usage
-		;;
-	esac
-done
-
-shift $(($OPTIND - 1))
-
-if [ $# = "0" ]
-then
-	echo "c89: missing operand" 1>&2
-	usage
-fi
-
-while [ $# != "0" ]
-do
-	case $1 in
-	-l* | *.a | *.c | *.o)
-		shift
-		;;
-	*)
-		echo "c89: invalid operand" 1>&2
-		usage
-		;;
-	esac
-done
-
-exec cc -ansi -pedantic -D_ANSI_SOURCE $_PARAMS