Shutting up flex output warnings

Would it be appropriate to apply the following patch to eliminate the
warnings generated by the flex output?

diff -ru ../cvs-pgsql/src/interfaces/ecpg/preproc/Makefile ./src/interfaces/ecpg/preproc/Makefile
--- ../cvs-pgsql/src/interfaces/ecpg/preproc/Makefile Sat Jul 27 22:10:05 2002
+++ ./src/interfaces/ecpg/preproc/Makefile Thu Oct 17 19:53:18 2002
@@ -14,7 +14,7 @@
-DINCLUDE_PATH=\"$(includedir)\"

ifeq ($(GCC), yes)
-override CFLAGS += -Wno-error
+override CFLAGS += -Wno-unused
endif

OBJS=preproc.o pgc.o type.o ecpg.o ecpg_keywords.o output.o\
diff -ru ../cvs-pgsql/src/pl/plpgsql/src/Makefile ./src/pl/plpgsql/src/Makefile
--- ../cvs-pgsql/src/pl/plpgsql/src/Makefile Thu Sep 5 20:28:46 2002
+++ ./src/pl/plpgsql/src/Makefile Thu Oct 17 19:54:16 2002
@@ -11,7 +11,7 @@
include $(top_builddir)/src/Makefile.global

ifeq ($(GCC), yes)
-override CFLAGS+= -Wno-error
+override CFLAGS+= -Wno-unused
endif

# Shared library parameters

--
Peter Eisentraut peter_e(at)gmx(dot)net