[PATCH] have ifunc resolver's return type match target

[Florian Weimer]

On 08/23/2017 04:48 PM, Martin Sebor wrote:
> On 08/23/2017 03:28 AM, Florian Weimer wrote:
>> On 08/21/2017 12:30 AM, Martin Sebor wrote:
>>> The following GCC patch has been submitted for review.  It
>>> helps detect mismatches between the type of an ifunc or alias
>>> declaration and the type of the resolver or alias.
>>>
>>> Â  https://gcc.gnu.org/ml/gcc-patches/2017-08/msg01103.html
>>>
>>> To let Glibc take advantage of this type checking and avoid
>>> warnings when using the patched GCC when the change above is
>>> committed, the patch below adjusts the Glibc __ifunc_resolver
>>> macro to declare the ifunc resolver so that its return type
>>> matches that of the target.  (I was going to wait to submit it
>>> until after the GCC patch has been accepted but per Joseph's
>>> suggestion I'm posting it here ahead of time.)
>>
>> Do we have to backport both patches to older releases, too, so that they
>> keep building with a newer GCC?
> 
> It would make sense to me if that's how Glibc usually deals with
> these sorts of things (i.e., changing code to avoid new warnings).
> The other (obvious) alternative is for people to suppress the
> warnings when using the new compiler.

Okay, I backported a few toolchain enablement patches to the 2.26 branch.

Thanks,
Florian