[PATCH] Avoid .symver on common symbols [BZ #21666]

[Zack Weinberg]

On Fri, Jun 23, 2017 at 5:13 PM, Florian Weimer <fweimer@redhat.com> wrote:
> On 06/23/2017 06:26 PM, H.J. Lu wrote:
>
>>> Does this result in a visible difference for applications?  If yes,
>>> please file a bug for this and reference it in the ChangeLog and commit
>>> message.
>>
>> It will be very hard to tell since these symbols were exported from libc.so
>> by accident and we only keep them in libc.so for backward binary compatibility.
>> Application can no longer reference them from libc.so.
>
> Ah, it's the old <regexp.h> interface, and the symbols were exported
> deliberately.  We apparently do not have any tests for it.

FYI, there's some reason to believe that this interface never actually
worked correctly -- see the discussion from when it was deprecated.

zw