Lisp Implemented in sed and Make
SedLisp (via Matthew Kane Parker, comments):
Though this Lisp implementation does not support eval function, we can implement eval on top of this interpreter - eval.l is the implementation.
GNU make has two builtin functions,
$(shell)and$(guile), which make the implementation less interesting. For example, GNU make lacks arithmetic operations, but you can easily add two numbers by$(shell expr 3 + 4)or$(guile (+ 3 4)). So, makelisp does not use either of them, except a single$(shell cat /dev/stdin)function call to make it easier for users to pass Lisp programs to makelisp.
