Put back kluge for linking with C++ compile but compiling .c files with C

compiler.  Eventually we might want to make /usr/include C++-conscious.

gnu/usr.bin/groff/Makefile.cfg

@@ -17,7 +17,7 @@ LIBBIB=		$(.CURDIR)/../libbib/obj/libbib.a
 LIBBIB=		$(.CURDIR)/../libbib/libbib.a
 .endif
 
-.if target(depend)
+.if make(depend)
 CFLAGS+=	-+
 .endif
 CFLAGS+=	-DHAVE_UNISTD_H=1\
@@ -37,9 +37,13 @@ CFLAGS+=	-DHAVE_UNISTD_H=1\
 		-DHAVE_SYS_SIGLIST=1\
 		-DARRAY_DELETE_NEEDS_SIZE=1
 
-# Just use C++ compiler for everything.
+# Use C++ compiler for linking.  XXX: This is a kluge!
+CCC=		cc
 CC=		$(CXX)
 
+.c.o:
+	$(CCC) $(CFLAGS) -c $(.IMPSRC)
+
 .y.cc:
 	$(YACC) $(YFLAGS) $(.IMPSRC)
 	mv y.tab.c $(.PREFIX).cc