Fw: [PATCH 03/14] Add _REENT_ERRNO(ptr)

[Sebastian Huber]

On 23/06/2022 12:55, Sebastian Huber wrote:
> On 21/06/2022 16:41, C Howland wrote:
>>>
>>> ------------------------------
>>> *From:* Newlib<newlib-bounces+craig.howland=caci.com@sourceware.org>  on
>>> behalf of Sebastian Huber<sebastian.huber@embedded-brains.de>
>>> *Sent:* Tuesday, June 21, 2022 8:49 AM
>>> *To:*newlib@sourceware.org  <newlib@sourceware.org>
>>> *Subject:* [PATCH 03/14] Add _REENT_ERRNO(ptr)
>>>
>>>
>>>
>>> From: Matt Joyce<matthew.joyce@embedded-brains.de>
>>>
>>> Add a _REENT_ERRNO() macro to encapsulate the access to the
>>> _errno member of struct reent. This will help to replace the
>>> structure member with a thread-local storage object in a follow
>>> up patch.
>>> ---
>>>
>> There already exists an __errno_r() macro that does the very same 
>> function
>> (defined in sys/errno.h).  (Its use, however, is limited, only being used
>> in files under iconv/lib.)  Having the same thing done both ways probably
>> doesn't make sense.  The new name is more consistent with the rest of the
>> things being done, while the old name is established and errno is a more
>> specialized case.  It probably would be a good idea to either
>> 1)  use __errno_r() instead of creating _REENT_ERRNO() or
>> 2)  replace __errno_r() with _REENT_ERRNO() as part of adding the latter.
> 
> I would not remove an existing macro, so option 1) would be preferred by 
> me.

Attached is a patch which implements option 1).

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