ptx : /usr/src/usr.bin/ptx/ptx.c /usr/include/stdio.h \
  /usr/include/sys/types.h /usr/include/machine/endian.h \
  /usr/include/sys/cdefs.h /usr/include/machine/ansi.h \
  /usr/include/machine/types.h /usr/include/ctype.h /usr/include/signal.h \
  /usr/include/sys/signal.h /usr/include/machine/signal.h \
  /usr/include/machine/trap.h /usr/src/usr.bin/ptx/pathnames.h 
