installing new package loader

[Tim Hunter <TimHunter@...>]

I'm trying to use lua in a non-standard environment that does not have 
access to anything like the typical file system and cannot use the I/O 
functions declared in C stdio.h. We also use a proprietary API to 
dynamically load C libraries. Therefore I need to replace the package 
loader functions in package.loaders with a special loader that is 
written in C. I understand how to write the loader function. What 
process do you recommend for installing this function in package.loaders 
and deleting the "standard" loaders loader_Lua, loader_C, and 
loader_Croot? I'd like to make the fewest possible changes to the lua 
source itself.

The approach I thought of was to add a new statically-linked library to 
the lualibs list in linit.c and do the replacement in the library 
initialization code.