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Re: string debug-mode solutions


> optimizations should not change the semantics, so I think b is
> disqualified. 

Agreed.

> If we have to do c, then we should go with d.  

Also agreed.

> Given the recurent issues with system with no weak symbol support I have
> a preference for a, and looking for ways out of it.

Oh really? My preference is now to do d, but do something like this in c
++config as well:

#ifdef _GLIBCXX_DEBUG
# if !defined(__GXX_WEAK__)
# warning debug mode disabled due to lack of weak symbol support
#endif
#else
... do the deal
#endif

I think this leaves debug mode in a place where it can be used reliably, and clearly gives warning to users when it cannot. 

The __GXX_WEAK__ macro should do the trick here, no?

Sound like a plan?

-benjamin
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