crom_add_chunk
crom_add_chunk(src, NULL, root, 0);
return crom_add_chunk(src, parent, chunk, CROM_TEXTLEAF);
crom_add_chunk(&src, NULL, &root, 0);
crom_add_chunk(&src, &root, &unit[0], CROM_UDIR);
crom_add_chunk(&src, &root, &unit[1], CROM_UDIR);
crom_add_chunk(&src, &root, &unit[2], CROM_UDIR);
extern int crom_add_chunk(struct crom_src *src, struct crom_chunk *,
crom_add_chunk(src, root, &sc->sc_unit4, CROM_UDIR);
crom_add_chunk(src, root, &sc->sc_unit6, CROM_UDIR);