[PATCH 4/5] Cygwin: add fast-path for posix_spawn(p)

[Mark Geisert]

On Fri, 13 Mar 2026, Sebastian Feld wrote:

> On Thu, Mar 12, 2026 at 3:45 PM Jon Turney <jon.turney@dronecode.org.uk> 
wrote:
>>
>> On 09/03/2026 09:54, Sebastian Feld wrote:
>>> Was this work ever merged into Cygwin1.dll?
>>
>> Unfortunately, not.  And Jeremy seems to have moved on to other ways to
>> apply his talents.
>>
>> It would be ideal if someone else would pick up that work and get it
>> finished off.
>
> That would require a cygwin.dll expert beyond my skill set.
>
> What about adding the current work as build option?

If/when "someone" can be found for this work, it would be far better to 
finish the work so it can be tested and merged.

I can't imagine providing a build option for an unfinished, unsupported, 
branch of the Cygwin DLL to "release" a lightning-rod feature to users who 
won't know how to make use of the incomplete code.  That just sounds like 
more future work for us, to be honest.

You've reminded us of this unfinished work so it's again visible to us. 
Thank you for that.

..mark