On 12/29/11 9:39 AM, Eli Zaretskii wrote:
>> Date: Thu, 29 Dec 2011 06:03:20 -0800
>> From: Daniel Colascione <dancol@dancol.org>
>>
>> @@ -184,7 +188,7 @@ struct option longopts[] =
>>    { "socket-name",	required_argument, NULL, 's' },
>>  #endif
>>    { "server-file",	required_argument, NULL, 'f' },
>> -#ifndef WINDOWSNT
>> +#ifndef HAVE_NTGUI
>>    { "display",	required_argument, NULL, 'd' },
>>  #endif
> 
> Maybe I'm confused: will HAVE_NTGUI be applicable to the Cygwin build
> that can use the w32 windowing?  If so, it sounds like you are
> creating here 2 kinds of emacsclient: one that can talk to a Cygwin
> Emacs with X frames on another display, the other that cannot.  Why
> cannot the same emacsclient work with both types of Emacs frames in a
> Cygwin Emacs?
> 
> Apologies if I've misread the changes.

No, you're right.  I was following the template of the existing code
here; IIUC, removing the conditional in the hunk above will let the same
emacsclient talk to any kind of Emacs.