[PATCH][BZ 21340] add support for POSIX_SPAWN_SETSID

[Florian Weimer]

On 04/04/2017 12:41 PM, Szabolcs Nagy wrote:
> On 04/04/17 10:38, Florian Weimer wrote:
>> On 04/03/2017 09:35 PM, Adhemerval Zanella wrote:
>>> On 03/04/2017 16:12, Florian Weimer wrote:
>>>> On 04/01/2017 04:29 PM, daurnimator wrote:
>>>>> diff --git a/posix/spawn.h b/posix/spawn.h
>>>>> index 36e3867e17..8d2ace1b87 100644
>>>>> --- a/posix/spawn.h
>>>>> +++ b/posix/spawn.h
>>>>> @@ -60,6 +60,7 @@ typedef struct
>>>>>  #ifdef __USE_GNU
>>>>>  # define POSIX_SPAWN_USEVFORK        0x40
>>>>>  #endif
>>>>> +#define POSIX_SPAWN_SETSID        0x80
>>>>>
>>>>
>>>> Doesn't this add the flag to past POSIX versions?
>>>
>>> I do not think this is an issue since afaik POSIX does not state any
>>> constraint regarding the flags values [1].  For instance, the example
>>> library implementation uses spawn as example and just use constant
>>> different than glibc [2].
>>
>> Sorry, this is not what I meant.  I was wondering if it was acceptable, from a namespace point of view, to
>> define the constant unconditionally, or if we have to use a feature test macro here.
>>
>
> POSIX_* is reserved so there is no namespace issue,
> but it can be conditional if glibc wants to be
> strict about what is visible under different
> posix versions (i don't think that is useful here).

Okay, I just wasn't sure about that.  Thanks for clarifying.

Florian