Re: minires-0.95 - a new package ready for review

[Nicholas Wourms <nwourms at netscape dot net>]

vinschen@redhat.com wrote:
> On Wed, Nov 19, 2003 at 01:23:05PM -0500, Pierre A. Humblet wrote:
>
> > Does linux use a recent bind adding underscores (grep res_query resolv.h)?
>
>
> Yes.
>
>
> > Does OpenSSH's configure behave OK there? If so, why?
>
>
> Apparently, on Linux the shared lib libresolve.so defines not only a
> text symbol __res_query, it also defines something called a weak
> symbol named res_query:
>
> $ nm libresolv.so | grep res_query
> 00006640 T __res_query
> 00006880 T __res_querydomain
> 00006640 W res_query
> 00006880 W res_querydomain
>
> While minres doesn't do the same:
>
> $ nm /usr/lib/libresolv.dll.a | grep res_query
> 00000000 T ___res_querydomain
> 00000000 I __imp____res_querydomain
> 00000000 T ___res_query
> 00000000 I __imp____res_query
>
> Does ld on Cygwin support weak symbols?  Or is it possible to
> define __imp__res_query additionally to __imp____res_query?

No, the current pe bfd doesn't support the weak attribute.  I believe 
only elf targets support it at this time (maybe some aout as well?). 
However, the kludge I use to get around this is to just do this in the 
source file:

#define foo __foo
int
__foo {
....
}

Or you can use a typedef if your symbol is a struct or similar.

Cheers,
Nicholas