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Date: Sun, 6 Sep 2020 23:51:07 +0200
From: Ulli Horlacher <framstag AT rus DOT uni-stuttgart DOT de>
To: cygwin AT cygwin DOT com
Subject: Re: rsync.exe: error while loading shared libraries: cyglz4-1.dll
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On Sun 2020-09-06 (16:11), René Berber via Cygwin wrote:

> > I have installed cygwin with cygwin-portable-installer (recommendation
> > from this mailing-list). Everything seems fine, but when I run rsync I get:
> > 
> > W10dev:~: rsync -h
> > C:/Users/admin/cygwin/bin/rsync.exe: error while loading shared libraries: cyglz4-1.dll: cannot open shared object file: No such file or directory


> Its the new version of rsync, which is recent... and probably is missing 
> dependencies on setup.

The error above appears on a freshly installed cygwin, on an older Windows
(VM) there is no such error.

On the new cygwin installation:

W10dev:~: ls -l /usr/bin/rsync
-rwxr-xr-x 1 admin None 2673952 Sep  6 10:27 /usr/bin/rsync


On the old (last year?) cygwin installation:

W10dev:~/WHOME: ls -l /usr/bin/rsync
-rwxr-xr-x 1 admin None 1842817 Jan 29  2016 /usr/bin/rsync

==> different rsync versions!



> My ldd output is different than yours, I do get the library you are missing:
> 
> $ ldd /usr/bin/rsync
>          ntdll.dll => /cygdrive/c/Windows/SYSTEM32/ntdll.dll 
> (0x7ffc31860000)
>          KERNEL32.DLL => /cygdrive/c/Windows/System32/KERNEL32.DLL 
> (0x7ffc31540000)
>          KERNELBASE.dll => /cygdrive/c/Windows/System32/KERNELBASE.dll 
> (0x7ffc2ee80000)
>          cygwin1.dll => /usr/bin/cygwin1.dll (0x180040000)
>          cygiconv-2.dll => /usr/bin/cygiconv-2.dll (0x3fe8b0000)
>          cygcrypto-1.1.dll => /usr/bin/cygcrypto-1.1.dll (0x3ff6f0000)
>          cygzstd-1.dll => /usr/bin/cygzstd-1.dll (0x3f9bf0000)
>          cygz.dll => /usr/bin/cygz.dll (0x3f9cf0000)
>          cyglz4-1.dll => /usr/bin/cyglz4-1.dll (0x3fc550000)

Strange... why doesn't my ldd list these additional libs?
Perhaps because they are not found?!
On UNIX ldd shows a "not found" error in such a case.


> Notice that there are more than one differences; they appear to be part 
> of libz (or maybe libzstd).
> 
> Probable work around: install the missing library.


W10dev:~: apt-cyg find lz4
(...)
Searching for installable packages matching lz4:
liblz4-devel
liblz4_1
lz4
lz4-debuginfo
mingw64-i686-lz4
mingw64-x86_64-lz4

Is it liblz4_1 ?
(yes - see below!)


> Another work around: install the previous version of rsync, which has 
> very different library dependencies (i.e. no libcrypto, no libz dependency).

W10dev:/usr/local/bin: cp -av /cygdrive/z/tmp/rsync.exe .
'/cygdrive/z/tmp/rsync.exe' -> './rsync.exe'

W10dev:/usr/local/bin: type -a rsync
rsync is /usr/local/bin/rsync
rsync is /usr/bin/rsync

W10dev:/usr/local/bin: /usr/local/bin/rsync --version
rsync  version 3.1.2  protocol version 31
Copyright (C) 1996-2015 by Andrew Tridgell, Wayne Davison, and others.
Web site: http://rsync.samba.org/
Capabilities:
    64-bit files, 64-bit inums, 64-bit timestamps, 64-bit long ints,
    socketpairs, hardlinks, symlinks, IPv6, batchfiles, inplace,
    append, ACLs, no xattrs, iconv, symtimes, prealloc

rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you
are welcome to redistribute it under certain conditions.  See the GNU
General Public Licence for details.

W10dev:/usr/local/bin: /usr/bin/rsync --version
C:/Users/admin/cygwin/bin/rsync.exe: error while loading shared libraries: cyglz4-1.dll: cannot open shared object file: No such file or directory
W10dev:/usr/local/bin:

Tatatataaaaaaaaa! :-)


AND:

W10dev:~: apt-cyg install liblz4_1
(...)
Package liblz4_1 installed

W10dev:~: find /usr | grep lz4
/usr/bin/cyglz4-1.dll

W10dev:~: /usr/bin/rsync --version
rsync  version 3.2.4dev  protocol version 31

And now ldd shows:

W10dev:~: ldd /usr/bin/rsync
        ntdll.dll => /cygdrive/c/Windows/SYSTEM32/ntdll.dll (0x7ffe42100000)
        KERNEL32.DLL => /cygdrive/c/Windows/System32/KERNEL32.DLL (0x7ffe414a0000)
        KERNELBASE.dll => /cygdrive/c/Windows/System32/KERNELBASE.dll (0x7ffe3f500000)
        cygcrypto-1.1.dll => /usr/bin/cygcrypto-1.1.dll (0x3ff9c0000)
        cygwin1.dll => /usr/bin/cygwin1.dll (0x180040000)
        cygiconv-2.dll => /usr/bin/cygiconv-2.dll (0x3fef50000)
        cyglz4-1.dll => /usr/bin/cyglz4-1.dll (0x550db0000)
        cygzstd-1.dll => /usr/bin/cygzstd-1.dll (0x3fd9e0000)
        cygz.dll => /usr/bin/cygz.dll (0x3fdaa0000)


Ok, this means: in the current cygwin distribution the rsync package is
broken?!
Where can I report this bug? Shall I at least?


-- 
Ullrich Horlacher              Server und Virtualisierung
Rechenzentrum TIK         
Universitaet Stuttgart         E-Mail: horlacher AT tik DOT uni-stuttgart DOT de
Allmandring 30a                Tel:    ++49-711-68565868
70569 Stuttgart (Germany)      WWW:    http://www.tik.uni-stuttgart.de/
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