ref: 11b5c4b8bf0a15777e9a7f2292f6c80f5a7b4a2d dir: /sys/src/cmd/diff/mkfile/
< /$objtype/mkfile TARG=diff OFILES=\ diffdir.$O\ diffio.$O\ diffreg.$O\ main.$O\ HFILES=diff.h BIN=/$objtype/bin </sys/src/cmd/mkone