[PATCH v3][BZ 21340] add support for POSIX_SPAWN_SETSID

[Joseph Myers]

On Wed, 5 Apr 2017, daurnimator wrote:

> 2017-04-05  Daurnimator  <quae@daurnimator.com>
> 
>     [BZ #21340]
>     * conform/data/spawn.h-data: Add POSIX_SPAWN_SETSID flag.

You should never add a symbol to the conform/ expectations unless it is 
actually defined by a released standard.  In a case like this, of a symbol 
intended to be added in a future version, it should not be in the conform/ 
data, and should be conditioned on __USE_GNU in the headers.

Note that http://austingroupbugs.net/view.php?id=1044 has the issue8 tag, 
meaning it's for the next major revision of POSIX, not a bug fix for a TC 
for the current revision.

-- 
Joseph S. Myers
joseph@codesourcery.com