stat

statはかち合うのでunixstatに変更

cpu% diff plan9?copydir.c ../src/port/copydir.c
78c78
<               if (unixstat(fromfile, &fst) < 0)
---
>               if (stat(fromfile, &fst) < 0)

cpu% cat mkfile.lib
</$cputype/mkfile
cpuO=$O
</$objtype/mkfile

OFILES=?
#port?
#plan9?
        plan9_copydir.$O?

LIB=libsql.a$O
</sys/src/cmd/mksyslib
CFLAGS=-I. -I../src/include -p -DT$objtype

%.$O: ../src/port/%.c
        $CC $CFLAGS ../src/port/$stem.c

%.$O: %.c
        $CC $CFLAGS $stem.c

# when cputype!=objtype, $PGENO causes unnecessary object files to be created.
# but when cputype==objtype, it keeps this mkfile from fighting with mkfile.pgen
# over creating some of these.
$cpuO.pgen:V: $PGENO
        objtype=$cputype mk -f mkfile.pgen $cpuO.pgen

$LIB:   $OFILES
        ar vu $LIB $newprereq

?は入れられないのかな