getentropy for <unistd.h>

[Florian Weimer]

On 12/27/2016 06:46 PM, Andreas Schwab wrote:
> On Dez 23 2016, Florian Weimer <fweimer@redhat.com> wrote:
>
>> Should I depend on _GNU_SOURCE instead?  The __USE_MISC feature macro
>> seems rather broad.
>
> __USE_MISC is what is used for BSD things.

Even for new BSD additions?  This part wasn't clear to me.

Should I switch the conditional to __USE_MISC here?

Thanks,
Florian