minires-0.95 - a new package ready for review
Nicholas Wourms
nwourms@netscape.net
Wed Nov 19 21:25:00 GMT 2003
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
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