4.4BSD/usr/src/contrib/groff-1.08/libdriver/Makefile.dep

input.o : input.cc ../include/driver.h ../include/errarg.h \
  ../include/error.h ../include/font.h ../include/printer.h \
  ../include/lib.h ../include/device.h
printer.o : printer.cc ../include/driver.h ../include/errarg.h \
  ../include/error.h ../include/font.h ../include/printer.h \
  ../include/lib.h