If I defcustom a variable in Elisp, how do I read

t's value in from within Emacs C source code?

I am sorry for such a newbie question, but if

someone can point me to some example in

sources so I can save some time I will be very

greatfull.

I was able to patch bytecomp.el to allow

byte compilation of "literate elisp", and I can

turn it off/on with elisp variable.

I just need tofix readevalpath for elisp to also

enable off/on for this feature. Readevalloop is btw,

declared as static function in C and not

exposed to elisp, so if I would to implement

everything in Elisp, I would need to rewrite lots

which I don't have neither skills nor time for. I

would just like to introduce a variable to turn

off/on that path, which is quite trivial, I just don't

know how to read Elisp values from C code. Or

do I need to do it other way around and

expose var from C to Elisp?