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Date: Sat, 16 May 2009 12:33:02 +0300
From: Eli Zaretskii <eliz AT gnu DOT org>
Subject: Re: [1.7] Updated: {emacs,emacs-X11,emacs-el}-23.0.92-1
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> Date: Fri, 15 May 2009 09:29:37 -0400
> From: Ken Brown <kbrown at cornell dot edu>
> CC: cygwin at cygwin dot com
> 
>      (concat ".newmail-"
> 	    (file-name-nondirectory
> 	     (if (memq system-type '(windows-nt cygwin ms-dos))
> 		 ;; cannot have colons in file name
> 		 (replace-regexp-in-string ":" "-" file)
> 	       file)))
> 
> By the way, the patch is no longer needed; as of cygwin 1.7, it's legal 
> to have colons in file names.

Right, but the Emacs developers do not want so easily to drop support
for all older versions of Cygwin, especially since Cygwin 1.7 is still
in beta.

Btw, it might be a good idea to introduce some Emacs function or
variable that would return the version of Cygwin being used at run
time, so that Lisp programs could avoid limiting Cygwin 1.7 and later
where older versions are inherently limited.  The above is a case in
point, even though it is not a grave limitation; but there are more
serious limitations in the Emacs sources that could be lifted for
newer Cygwin versions, if Emacs could know the Cygwin version.

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