Roland McGrath roland@hack.frob.com
Fri Apr 20 20:36:00 GMT 2012

> Currently we use weak undefined symbol, foo, to do
> if (&foo != 0)
>  foo is defined.
> else
>  foo isn't defined.
> We want is to define foo as a secondary symbol so that
> we can always use foo without checking.  If there is a primary
> one in a .o file and .so file, we will get the primary one,
> otherwise, we will use the secondary one.

Why not use a weak definition in the file where you make the call?

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