Using C++ in GCC is OK

[DJ Delorie]

>   In a project with as many globals as we have, it's kinda handy to
> know at a glance whether a member function is accessing a data
> member or a global.

Add a globals-in-namespaces rule, or a ::global syntax, and you have
even more overkill.

IMHO we should make it easy to implement a clean design, and hard to
implement a poor one.  Use the extra syntax on the cases we want to
discourage (cross-module references, non-namespace-globals, etc) and
leave the desirable designs (well-contained code, modularization) with
the simpler syntax.