Re: Problem with sys_select on Cygwin

[Ken Brown]

On 3/21/2016 12:04 PM, Eric Blake wrote:
> Do we even need to wait for a version number from newlib, or can we
> probe based on one of the other changes going in at the same time?  For
> example, part of the newlib/Cygwin changes was the addition of a new
> sys/_timespec.h, with a new witness variable _SYS__TIMESPEC_H_, which
> should not be defined in the older layout of the headers.  Therefore, it
> may be feasible to do:
>
> #if !((defined __GLIBC__ \
>        || (defined __NEWLIB__ && defined _SYS_TIMESPEC_H)) \

                                          _SYS__TIMESPEC_H_

>       && !defined __UCLIBC__
>
> and thereby simultaneously cater to both old and new cygwin headers
> without waiting for a version number bump from newlib.

This assumes that sys/time.h has already been included.  But part of the 
patch that Paul applied was to avoid that inclusion.

Ken