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Subject:	Re: rsync.exe: error while loading shared libraries: cyglz4-1.dll
To:	cygwin AT cygwin DOT com
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	<20200906215107 DOT GB19595 AT tik DOT uni-stuttgart DOT de>
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Message-ID:	<d71c77b5-3de1-698c-04aa-ec14c4f3a9d0@SystematicSw.ab.ca>
Date:	Sun, 6 Sep 2020 16:23:23 -0600
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On 2020-09-06 15:51, Ulli Horlacher wrote:
> 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:

Official recommendation from this mailing list would always be to use the Cygwin
Setup program downloaded directly from the cygwin.com site.

>>> 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?

Please see earlier comments about workarounds.

Cygwin project can support only the current version of any package on currently
supported Windows versions.

Please download and rerun the Cygwin Setup program, with the -g, --upgrade-also
option to upgrade or install any missing packages, and redo your testing.

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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