bug#51894: 27.2; GDB Gud support on Cygwin has trouble accessing shared files on Windows network drives.

[Eli Zaretskii <eliz@gnu.org>]

> From: Guy Offer <guyof@checkpoint.com>
> CC: "51894@debbugs.gnu.org" <51894@debbugs.gnu.org>
> Date: Wed, 17 Nov 2021 15:01:09 +0000
> 
> Also, is Emacs capable of visiting file specified as "\cygdrive\f\source\", i.e. does "C-x C-f" work with such names? Emacs can do that if I load the file manually.  However, when emacs tries to open the file as received from gdb (to display the source) it fails.  It only succeeds if I set the pathname to \\cygdrive\f\source.  However in that case the gdb command window cannot access the file. 

Please show the Emacs commands and GDB commands you use in these two
cases.  I'm not sure I understand what you mean by "load file
manually" and "open a file received from gdb"

> Pls note that this happens only if f is a network drive .

So maybe it's a Cygwin-specific problem with networked drives?  I'll
CC Ken Brown, who is our Cygwin specialist.  Ken, does this ring a
bell? does /cygdrive/x/ fail when X is a networked drive?

Or maybe the way your networked drives are mounted prevents Emacs from
accessing them due to some authentication issue?