Re: checking for Berkley db 4.2 --> 4.3 upgrade

[Paul Eggert]

It depends on what you're trying to check for.  If all you're trying
to check is whether a particular form of call will work, then check
that form of call (as you have).  If you want to check for the exact
signature, though, then I'd take the address of the function pointer
and assign it to a pointer-to-a-pointer-of-a-function of the exact
signature that you want.