Use -ansi -pedantic -trigraphs, as suggested by Bruce.

Enforce that only Posix-spec'ed options are being used, so people could
use this as a Posixificator of some kind.

Document the Posix usage in the man page, so to make it clear what's
the difference between Posix c89, and gcc.

usr.bin/c89/c89.1

@@ -23,7 +23,7 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\" $Id$
+.\" $Id: c89.1,v 1.1.1.1 1997/09/17 20:44:54 joerg Exp $
 .\" "
 .Dd September 17, 1997
 .Os
@@ -50,23 +50,118 @@ This is the name of the C language compiler as required by the
 .St -p1003.2 .
 standard.
 .Pp
-Since the standard demands that any program conforming to the C language
-standard must be acceptable, the
-.Xr cc 1
-options
-.Fl ansi
-and
-.Fl trigraphs
-are always in effect, and an attempt to call
+The
 .Nm
-with the
-.Fl traditional
-will be rejected.
+compiler accepts the following options:
+.Bl -tag -offset indent -width "-D name = value"
+.It Fl c
+Suppress the link-edit phase of the compilation, and do not remove any
+object files that are produced.
+.It Fl D Ar name Ns Op Ar =value
+Define name as if by a C-language
+.Ql #define
+directive.  If
+no
+.Ar =value
+is given, a value of 1 will be used.  The
+.Fl D
+option has lower precedence than the
+.Fl U
+option.  That is, if
+.Ar name
+is used in both a
+.Fl U
+and a
+.Fl D
+option,
+.Ar name
+will be undefined regardless of the order of the options.  The
+.Fl D
+option may be specified more than once.
+.It Fl E
+Copy C-language source files to the standard output, expanding all
+preprocessor directives; no compilation will be performed.
+.It Fl g
+Produce symbolic information in the object or executable files.
+.It Fl I Ar directory
+Change the algorithm for searching for headers whose names are not
+absolute pathnames to look in the directory named by the
+.Ar directory
+pathname before looking in the usual places.  Thus, headers whose
+names are enclosed in double-quotes (\&"\&") will be searched for first
+in the directory of the file with the
+.Ql #include
+line, then in
+directories named in
+.Fl I
+options, and last in the usual places.  For
+headers whose names are enclosed in angle brackets (<>), the header
+will be searched for only in directories named in
+.Fl I
+options and then in the usual places.  Directories named in
+.Fl I
+options shall be searched in the order specified.  The
+.Fl I
+option may be specified more than once.
+.It Fl L Ar directory
+Change the algorithm of searching for the libraries named in the
+.Fl l
+objects to look in the directory named by the
+.Ar directory
+pathname before looking in the usual places.  Directories named in
+.Fl L
+options will be searched in the order specified.  The
+.Fl L
+option may be specified more than once.
+.It Fl o Ar outfile
+Use the pathname
+.Ar outfile ,
+instead of the default
+.Pa a.out ,
+for the executable file produced.
+.It Fl O
+Optimize the compilation.
+.It Fl s
+Produce object and/or executable files from which symbolic and other
+information not required for proper execution has been removed
+(stripped).
+.It Fl U Ar name
+Remove any initial definition of
+.Ar name .
+The
+.Fl U
+option may be specified more than once.
+.El
 .Pp
-See the manual page for
-.Xr cc 1
-for a complete description.
+An operand is either in the form of a pathname or the form
+.Fl l
+library.  At least one operand of the pathname form needs to be
+specified.  Supported operands are of the form:
+.Bl -tag -offset indent -width "-l library"
+.It Pa file Ns \&.c
+A C-language source file to be compiled and optionally linked.  The
+operand must be of this form if the
+.Fl c
+option is used.
+.It Pa file Ns \&.a
+A library of object files, as produced by
+.Xr ar 1 ,
+passed directly to the link editor.
+.It Pa file Ns \&.o
+An object file produced by
+.Nm
+.Fl c ,
+and passed directly to the link editor.
+.It Fl l Pa library
+Search the library named
+.Dl lib Ns Em library Ns \&.a
+A library will be searched when its name is encountered, so the
+placement of a
+.Fl l
+operand is significant.
+.El
 .Sh SEE ALSO
+.Xr ar 1 ,
 .Xr cc 1
 .Sh STANDARDS
 The

usr.bin/c89/c89.sh

@@ -24,17 +24,34 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
-#	$Id$
+#	$Id: c89.sh,v 1.1.1.1 1997/09/17 20:44:53 joerg Exp $
 #
 # This is the Posix.2 mandated C compiler.  Basically, a hook to the
 # cc(1) command.
 
-if echo "$*" | grep -q -- -traditional
-then
-	echo "c89: non-standard C not supported by the Posix compiler version"\
-		1>&2
+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
+}
+
+while getopts "cD:EgI:L:o:OsU:" opt
+do
+	case $opt in
+	[cDEgILoOsU])
+		;;
+	*)
+		usage
+		;;
+	esac
+done
+
+if [ $(($OPTIND - 1)) = $# ]
+then
+	echo "Missing operand" 1>&2
+	usage
 fi
 
-exec cc -ansi -trigraphs "$@"
+exec cc -ansi -pedantic -trigraphs "$@"