submemcmp
rc = submemcmp(sdl1, sdl2, sdl1->sdl_len, sdl2->sdl_len,
rc = submemcmp(sdl1, sdl2, sdl1->sdl_len, sdl2->sdl_len,
rc = submemcmp(sdl1, sdl2, sdl1->sdl_len, sdl2->sdl_len,
rc = submemcmp(sdl1, sdl2, sdl1->sdl_len, sdl2->sdl_len,