>>10I'm not
>>6 , but I just tried Vacietis.
I wouldn't call it < 4000 lines. Vacietis itself is closer to 6000 lines, and it pulls in ~60000 lines of dependencies in .lisp files according to a quick scan of ~/quicklisp/. If we let dependencies slide then we're in ``I can write a load balancing web server in five lines of Ruby
!'' territory. Of course, 4000 was probably hyperbole by whoever first said it, and 60000 lines of Lisp is probably simpler than the millions of lines of Sepples that gcc is written in, so I won't quibble over the idea that ``Written in Lisp, it could be simpler''.
However, I don't think the complexity of those 60k lines is enough. It seemed to have some problems with my input files which
gcc -Wall -pedantic had no issues with (couldn't find
time.h and other headers, and after I inserted them manually it seemed to get confused over an erroneous ``unexpected end of file''). I remain unconvinced.