[PATCH v3 3/5] Use _dl_writev on __libc_message_impl

[Florian Weimer]

* Adhemerval Zanella Netto:

> On 18/11/25 04:30, Florian Weimer wrote:
>> * Adhemerval Zanella:
>> 
>>> And change _dl_writev to return an negative errno in case of failure.
>>> This keeps the required semantic on not setting errno in case of
>>> failure and allow remove the Linux libc_fatal.c implementation.
>>>
>>> It also makes is simple to use writev syscall during process startup,
>>> specially on i386 where it requires to disable the vDSO usage.
>> 
>> The second part requires moving the implementation into a .c file,
>> though, and including <startup.h> when that .c file is built?
>
> We already have a sysdeps/unix/sysv/linux/i386/dl-writev.h that handles
> it from 434eca873f14f618d6c2279b54fb809fb56f2c50.

If <sysdep.h> is included before this (indirectly), it won't work.  I think?

Thanks,
Florian