Compilers and Libraries used from the system

[Florian Weimer]

* Kelly O'Hair:

> I'm not saying we shouldn't try and use more external instances of
> libraries, just saying we need to be very careful and make sure that what
> we use is secure, mapped&scoped, safe, reliable, and always available.

I think ELF linkers support a private, per-DSO namespace nowadays, so
the issue of conflicts mostly disappears.  It has to be this way
because the Gtk Swing theme pulls in tons of system libraries
(including zlib, freetype and libpng).