newbrk = (void *__unbounded) INTERNAL_SYSCALL (brk, 1, __ptrvalue (addr));
INTERNAL_SYSCALL_DECL (err); newbrk = (void *__unbounded) INTERNAL_SYSCALL (brk, err, 1, __ptrvalue (addr));
weak_alias (__curbrk, ___brk_addr)int__brk (void *addr){  void *__unbounded newbrk;  newbrk = (void *__unbounded) INTERNAL_SYSCALL (brk, 1, __ptrvalue (addr));  __curbrk = newbrk;  if (newbrk < addr)    {      __set_errno (ENOMEM);      return -1;    }  return 0;}