[pubcookie-dev] Re: Problem With pbc_apacheconfig and mod_pubcookie?

[Jeffrey T Eaton]

On Jul 26, 2006, at 2:51 PM, Jon Miner wrote:

> Jeff, Steve and Jim (and everybody else, of course):
>
> One of our customers was attempting to compile mod_pubcookie on Mac OS
> 10.3 (Not that it matters, I get the same error on 10.4) with  
> Apache 2.

(code deleted)

> Per my K&R, this code should not function.  pubcookie_module will be a
> pointer to garbage (or maybe NULL -- depending on the compiler), since
> the initialization from mod_pubcookie.c doesn't survive outside the  
> file
> it is contained in.
>
> By Mike's and my understanding, the declaration in mod_pubcookie.h
> should be:
>     extern module pubcookie_module;
> to make the linker find the initialized variable in mod_pubcookie's
> object file (static or dynamic).
>
> But what I don't understand is how this works at all, on any platform.
> It seems to be detected by attempting to compile dynamically, and
> somehow it seems to work for statically compiled versions on Apache  
> 1.3.
>
> Comments?  Anybody got ideas?

I agree that probably it shouldn't work, and I don't understand how  
it does work, but clearly it does.  Does it still work if you just  
change the code to "extern module pubcookie_module"?  If that still  
works, then I can't think of any reason not to change it.

-jeaton