from stdint import *
import t


extern def malloc(size:  t.CSizeT) -> t.CPtr
extern def calloc(nmemb: t.CSizeT, size: t.CSizeT) -> t.CPtr
extern def realloc(p: t.CPtr, size: t.CSizeT) -> t.CPtr
extern def free(p: t.CPtr)
extern def system(cmd: t.CConst | str) -> int
extern def exit(status: int)