I used this for one of the gcc 2.97 snapshots.

It is here in case we decide we want the directory to match the binary name
since neither the binary nor the source file(s) are named 'cccp' any longer.

gnu/usr.bin/cc/cpp0/Makefile

@@ -0,0 +1,16 @@
+# $FreeBSD$
+
+.include "../Makefile.inc"
+
+.PATH: ${GCCDIR}
+
+PROG=	cpp0
+SRCS=	cppdefault.c cpperror.c cppexp.c cppfiles.c cpphash.c cppinit.c cpplex.c cpplib.c \
+	cppmain.c cppulp.c mkdeps.c
+BINDIR=	/usr/libexec
+NOMAN=	1
+
+DPADD+=	${LIBCC_INT}
+LDADD+=	${LIBCC_INT}
+
+.include <bsd.prog.mk>