Consider the following Makefile:

hi : hw

$./$hw $>$ hi

hw$.$c: hw$.$start

$($cat hw$.$start ; echo $$int main$()\{$ printf$("$hi$\backslash$

$")$; $\})>$ hw$.$c

hw : hw$.$c

cc $-$o hw $-$O hw$.$c

hw$.$start:

echo $$#include $>$ hw$.$start Draw the subtree, showing all the files in m$2$ after $$make$$ had finished.