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Date:	Mon, 27 May 2024 13:41:17 +0200
Message-ID:	<CAKAoaQ=oysrMQpLJDwrFT1fGSi0kMtEna8UotvixZ0eGW7B51A@mail.gmail.com>
Subject:	Re: Cygwin setup-x86_64.exe cannot install into UNC paths...
To:	cygwin AT cygwin DOT com
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From:	Roland Mainz via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Roland Mainz <roland DOT mainz AT nrubsig DOT org>
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On Mon, May 27, 2024 at 1:11 PM Roland Mainz <roland DOT mainz AT nrubsig DOT org> wrote:
> I tried to install Cygwin on a network share using the UNC path name
> (e.g. \\derfwnb4966_ipv4 AT 2049\nfs4\storagetek\cygwintest001\), but got
> this response: "The install directory must be absolute, with both a
> drive letter and leading slash, like C:\Cygwin" ...
> ... is it possible to remove this restriction, so Cygwin can be
> installed into UNC paths, please ?

Quick&dirty workaround:
$ subst W: '\\derfwnb4966_ipv4 AT 2049\nfs4\storagetek\cygwintest001\' # ...

... but then all hell breaks loose:
--------- snip --------
# Cygwin version globally installed in C:\cygwin64 is
"3.6.0-0.115.g579064bf4d40.x86_64"
# Cygwin version installed in W:\ is 3.5.3-release
$ (export PATH=$PWD/bin ; ldd ./bin/file --help)
      1 [main] ldd (9340)
\\derfwnb4966_ipv4 AT 2049\nfs4\storagetek\cygwintest001\bin\ldd.exe: ***
fatal error - fhandler size mismatch detected - 0x290/0x288.
This problem is probably due to using incompatible versions of the cygwin DLL.
Search for cygwin1.dll using the Windows Start->Find/Search facility
and delete all but the most recent version.  The most recent version *should*
reside in x:\cygwin\bin, where 'x' is the drive on which you have
installed the cygwin distribution.  Rebooting is also suggested if you
are unable to find another cygwin DLL.

$ ldd ./bin/file
        ntdll.dll => /cygdrive/c/Windows/SYSTEM32/ntdll.dll (0x7ffb59ef0000)
        KERNEL32.DLL => /cygdrive/c/Windows/System32/KERNEL32.DLL
(0x7ffb595d0000)
        KERNELBASE.dll => /cygdrive/c/Windows/System32/KERNELBASE.dll
(0x7ffb57a90000)
        cygmagic-1.dll =>
//derfwnb4966_ipv4 AT 2049/nfs4/storagetek/cygwintest001/bin/cygmagic-1.dll
(0x4d9220000)
        cygwin1.dll =>
//derfwnb4966_ipv4 AT 2049/nfs4/storagetek/cygwintest001/bin/cygwin1.dll
(0x7ffb39240000)
        cyglzma-5.dll =>
//derfwnb4966_ipv4 AT 2049/nfs4/storagetek/cygwintest001/bin/cyglzma-5.dll
(0x593420000)
        cygbz2-1.dll =>
//derfwnb4966_ipv4 AT 2049/nfs4/storagetek/cygwintest001/bin/cygbz2-1.dll
(0x5bd7a0000)
        cygz.dll =>
//derfwnb4966_ipv4 AT 2049/nfs4/storagetek/cygwintest001/bin/cygz.dll
(0x597fd0000)
        cygzstd-1.dll =>
//derfwnb4966_ipv4 AT 2049/nfs4/storagetek/cygwintest001/bin/cygzstd-1.dll
(0x5d5150000)
--------- snip --------

Looking at |get_cygwin_startup_info()| - is it possible that somehow
the cygwin1.dll from Cygwin 3.5.3 and Cygwin 3.6 get mixed ?

----

Bye,
Roland
-- 
  __ .  . __
 (o.\ \/ /.o) roland DOT mainz AT nrubsig DOT org
  \__\/\/__/  MPEG specialist, C&&JAVA&&Sun&&Unix programmer
  /O /==\ O\  TEL +49 641 3992797
 (;O/ \/ \O;)

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