[fpc-pascal] Duplicate RTLs

[Marco van de Voort]

In our previous episode, Adriaan van Os said:
> Marco van de Voort wrote:
> > Also RTTI like class info (not used over typinfo unit) like IS, AS, .InheritsFrom?
> > IOW Objecttype identity operations.
> 
> Thanks for the info. I suggest to document this somewhere. But I am not
> (in my own code projects) using RTTI, class info, FPC memory allocation,
> reference counted types, exception catching or global variables.  Which
> explains that I never got in trouble there.

Note various to/from string and date types use locale info that is also
duplicated. Basically everything that uses RTL state + anything that uses
compiler generated tables. (there is two times RTL state and there can be
two copies of those compiler tables).

Some of it is somewhat documented on

http://wiki.freepascal.org/packages

specially the "What do we need them for? What's "special" about packages?"
part.