Stallman is the enemy of your Lisp!

http://www.gnu.org/prep/standards/html_node/Source-Language.html#Source-Language
>in general it is much better to use C, rather than the comparable alternatives.
>C has one advantage over other compiled languages: more people know C
>the best language to use is C. Using another language is like using a non-standard feature: it will cause trouble for users.