bad gcc/libstdc++-v3 build on Solaris 7

[Benjamin Kosnik]

dare I say it? This is sufficiently confusing as to make a FAQ entry 
necessary. It's a perennial topic.

> Except that it's not broken.  :-|  Freakishly confusing, but not broken.
> Fortunately, the only people who usually have to worry about these things
> are the developers like you and me, and the system integrators.  Ye Olde
> Ende User shouldn't ever see this stuff.