On 9/15/2016 12:36 PM, Eli Zaretskii wrote:
>> Cc: 24441@debbugs.gnu.org, schwab@suse.de, brady@bradyt.com
>> From: Ken Brown <kbrown@cornell.edu>
>> Date: Thu, 15 Sep 2016 12:03:08 -0400
>>
>>> See the bug I pointed to, where John explained that OS X filesystems
>>> can be either case-sensitive or case-insensitive.
>>
>> FWIW, this is also true on Cygwin:
>>
>>
>> https://cygwin.com/cygwin-ug-net/using-specialnames.html#pathnames-casesensitive
>
> I was under the impression that most or all Cygwin users do use
> case-sensitive file names.

I don't know for sure, but I would guess the opposite, simply because 
using case-sensitivity requires reading the documentation and changing a 
registry entry.

> But if that's not the reality, then yes, a patch to add a run-time
> test for Cygwin will also be welcome.

The attached patch attempts to do this for both Cygwin and OS X.  I 
don't have access to an OS X system, so someone else will have to test 
the OS X part.

Ken