*_core.h... Where does this come from?
 

So I have the big code base from another group here at work, and they have a lot of includes that look like /usr/include/internal/*_core.h

There appear to be scattered references to this on the internet, but I can't figure out what "internal" means (in the path) or where it all comes from. Does anyone know? The files are things like ctype_core.h, stdlib_core.h, and other variants of standard headers.

Never seen this. Maybe it is headers for libraries which have been developed internally in your company?

I suppose it's possible, but they seem to all take names from std headers so it doesn't really seem likely. If so, I'm screwed because I wouldn't have access to that code (bureaucracy sucks :) ).

Thanks.