shared libg2c?

[nbecker@fred.net]

>>>>> "Toon" == Toon Moene <toon@moene.indiv.nluug.nl> writes:

    Toon> nbecker@fred.net wrote:
    >> I suggest libgc2 be installed shared as well as archive, where
    >> supported.

    Toon> Note that for libg2c being installed shared *usefully* first of all the
    Toon> code has to be made reentrant.

I don't understand.  Could you please elaborate?  Specifically, why is
it useful to have a non-reentrant archive lib, but it's not useful if
it's compiled as a shared lib?