size_t cdecl__advance(struct output_state *dst, size_t amount);
size_t cdecl__emit(struct output_state *dst, const char *src);
+size_t cdecl__strlcpy(char *dst, const char *src, size_t len);
const char *cdecl__emit_specs(struct output_state *dst,
struct cdecl_declspec *s,