/* ipp-vars.c */
extern void _ippVarsDeinit(_ipp_vars_t *v);
-extern void _ippVarsExpand(_ipp_vars_t *v, char *dst, const char *src, size_t dstsize) __attribute__((nonnull(1,2,3)));
+extern void _ippVarsExpand(_ipp_vars_t *v, char *dst, const char *src, size_t dstsize) _CUPS_NONNULL(1,2,3);
extern const char *_ippVarsGet(_ipp_vars_t *v, const char *name);
extern void _ippVarsInit(_ipp_vars_t *v, _ipp_fattr_cb_t attrcb, _ipp_ferror_cb_t errorcb, _ipp_ftoken_cb_t tokencb);
extern const char *_ippVarsPasswordCB(const char *prompt, http_t *http, const char *method, const char *resource, void *user_data);