CHDIR
#ifdef CHDIR
#ifdef CHDIR
#ifdef CHDIR /* otherwise no chdir() */
#ifdef CHDIR
#ifdef CHDIR
#ifdef CHDIR
#ifdef CHDIR
op_chdir = GETSYSCALL(rump, CHDIR);
op_chdir = GETSYSCALL(host, CHDIR);
{ DUALCALL_CHDIR, "chdir", RSYS_NAME(CHDIR) },