Enable linknamespace testing for libdl and libcrypt

[Florian Weimer]

On 11/18/2016 07:07 PM, Joseph Myers wrote:
> On Fri, 18 Nov 2016, Florian Weimer wrote:
>
>>> That is, this configuration involves a namespace bug,
>>
>> Agreed.
>>
>>> which is  hard to fix so the names in question are whitelisted.
>>
>> Sorry, I don't understand this part.
>
> The whitelist in conform/linknamespace.pl covers both false positives and
> genuine but hard-to-fix bugs.  So these names should be added there with
> an appropriate comment.
>
> # The following whitelisted symbols are also allowed for now.
> #
> # * Bug 17576: stdin, stdout, stderr only reserved with external
> # linkage when stdio.h included (and possibly not then), not
> # generally.
> #
> # * Bug 18442: re_syntax_options wrongly brought in by regcomp and
> # used by re_comp.
> #
> # * False positive: matherr only used conditionally.  matherrf/matherrl are used
> # by IA64 too for the same reason.
> #
> @whitelist = qw(stdin stdout stderr re_syntax_options matherr matherrf
>                 matherrl);

Okay, this approach looks fine to me.

Thanks,
Florian