Index: cp/Make-lang.in
===================================================================
--- cp/Make-lang.in	(revision 172670)
+++ cp/Make-lang.in	(working copy)
@@ -105,7 +105,10 @@ cc1plus$(exeext): $(CXX_OBJS) cc1plus-ch
 	      $(CXX_OBJS) cc1plus-checksum.o $(BACKEND) $(LIBS) $(BACKENDLIBS)
 
 # Special build rules.
+ifneq ($(MAINT),)
 $(srcdir)/cp/cfns.h: $(srcdir)/cp/cfns.gperf
+endif
+$(srcdir)/cp/cfns.h:
 	gperf -o -C -E -k '1-6,$$' -j1 -D -N 'libc_name_p' -L ANSI-C \
 		$(srcdir)/cp/cfns.gperf > $(srcdir)/cp/cfns.h