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From:	Eliot Moss <moss AT cs DOT umass DOT edu>
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Date:	Thu, 19 Jan 2017 08:23:13 -0500
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On 1/19/2017 12:22 AM, Steven Penny wrote:
 > On Tue, 17 Jan 2017 21:45:07, Steven Penny wrote:
 >> I would like to keep this productive; my next step is to try to unpack that
 >> large commit, while also helping Eric to reproduce.
 >
 > I have root caused this. With the new readline, running ./configure creates
 > config.h, as expected. However new version adds this line:
 >
 > #define HAVE_PSELECT 1
 >
 > If you remove this from config.h, then make, the resultant DLL behaves as it did
 > with previous readline. Not sure what is causing this change, I will try to dig
 > into it more.

You probably found it, but here's why they added use of pselect:

"h.  Use pselect(2), if available, to wait for input before calling read(2), so
     a SIGWINCH can interrupt it, since it doesn't interrupt read(2)."

Of course that does not explain why it's not working how we would like ...

Regards - EM

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