Improve the OOP ABI

[Richard (Rikki) Andrew Cattermole]

https://linux.die.net/man/3/dlopen

RTLD_NOW
If this value is specified, or the environment variable LD_BIND_NOW is 
set to a nonempty string, all undefined symbols in the library are 
resolved before dlopen() returns. If this cannot be done, an error is 
returned.

That is fine, this is kinda what you should usually use to prevent 
errors happening elsewhere (which won't be easily understood).



RTLD_GLOBAL
The symbols defined by this library will be made available for symbol 
resolution of subsequently loaded libraries.

RTLD_LOCAL
This is the converse of RTLD_GLOBAL, and the default if neither flag is 
specified. Symbols defined in this library are not made available to 
resolve references in subsequently loaded libraries.

RTLD_LOCAL basically isolates all exports from one shared library once 
loaded from being matched to other shared library/executable externs. 
This is probably what you want when loading plugins.