Don't report deprecated symbols as unused symbols

src/Makefile.am

@@ -283,6 +283,8 @@ harfbuzz-icu.def: $(HB_ICU_headers)
 	$(AM_V_GEN) $(srcdir)/gen-def.py "$@" $^
 harfbuzz-gobject.def: $(HB_GOBJECT_headers)
 	$(AM_V_GEN) $(srcdir)/gen-def.py "$@" $^
+harfbuzz-deprecated.def: $(srcdir)/hb-deprecated.h
+	$(AM_V_GEN) $(srcdir)/gen-def.py "$@" $^
 
 
 GENERATORS = \

test/api/Makefile.am

@@ -166,11 +166,13 @@ symbols-tested.txt: $(TEST_PROGS)
 	$(AM_V_GEN)$(top_builddir)/libtool --mode=execute nm $^ \
 	| grep ' U hb_' | sed 's/.* U hb_/hb_/' \
 	| sort | uniq > $@.tmp && mv $@.tmp $@
+symbols-tested-or-deprecated.txt: symbols-tested.txt $(top_builddir)/src/harfbuzz-deprecated.def
+	$(AM_V_GEN)cat $^ | sort | uniq > $@.tmp; mv $@.tmp $@
 symbols-exported.txt: $(top_builddir)/src/.libs/libharfbuzz.so
 	$(AM_V_GEN)$(top_builddir)/libtool --mode=execute nm $^ \
 	| grep ' T ' | sed 's/.* T //' | grep -v '^\(_init\|_fini\)$$' \
 	| sort | uniq > $@.tmp && mv $@.tmp $@
-symbols-untested.txt: symbols-tested.txt symbols-exported.txt
+symbols-untested.txt: symbols-tested-or-deprecated.txt symbols-exported.txt
 	$(AM_V_GEN)diff $^ > $@.tmp; mv $@.tmp $@
 CLEANFILES += symbols-tested.txt symbols-exported.txt symbols-untested.txt
 check-symbols: symbols-untested.txt