bug#22689: [PATCH] Add logcount

[Eli Zaretskii]

> Date: Sat, 30 Sep 2017 10:55:25 -0400
> From: Mark Oteiza <mvoteiza@udel.edu>
> Cc: 22689@debbugs.gnu.org
> 
> > Btw, on Windows, a long is a 32-bit type, so I think we need
> > to check against ULONG_LONG_MAX as well.
> 
> I tried implementing your comments (and added a test).  I don't know
> what to do in the #else for ULONG_LONG_MAX.

Same as you do for ULONG_MAX, I think.