Public headers: Decorate public symbols with HB_EXTERN
This prepares the headers for exporting symbols using visibility
attributes or __declspec(dllexport), so that we do not need to maintain
symbols listing files, as this is what was and is done in GLib and GTK+.
diff --git a/src/hb-graphite2.h b/src/hb-graphite2.h
index 3eae54a..122c3e4 100644
--- a/src/hb-graphite2.h
+++ b/src/hb-graphite2.h
@@ -36,10 +36,10 @@
#define HB_GRAPHITE2_TAG_SILF HB_TAG('S','i','l','f')
-gr_face *
+HB_EXTERN gr_face *
hb_graphite2_face_get_gr_face (hb_face_t *face);
-gr_font *
+HB_EXTERN gr_font *
hb_graphite2_font_get_gr_font (hb_font_t *font);
