Plan 9 from Bell Labs’s /usr/web/sources/plan9/sys/src/ape/cmd/expr/mkfile
APE=/sys/src/ape <$APE/config TARG=expr OFILES=y.tab.$O YFILES=expr.y HFILES=regexp.h BIN=$APEBIN </sys/src/cmd/mkone YFLAGS=-S CFLAGS=-B -c