HB_BEGIN_DECLS
-hb_script_t
+HB_EXTERN hb_script_t
hb_icu_script_to_script (UScriptCode script);
-UScriptCode
+HB_EXTERN UScriptCode
hb_icu_script_from_script (hb_script_t script);
-hb_unicode_funcs_t *
+HB_EXTERN hb_unicode_funcs_t *
hb_icu_get_unicode_funcs (void);