• kdb+

  How to address ‘..appy libs required to decompress .

  Posted by voiddump on January 16, 2024 at 12:00 am

  Hi,

  I tried to load data from a hardware, got an error message

  How can I solve this? I’m running on a Macbook Pro (Version 13.4.1).

  voiddump replied 8 months, 2 weeks ago 2 Members · 5 Replies
• 5 Replies

• 

  gyorokpeter-kx

  Member

  January 16, 2024 at 12:00 am

  Have you tried installing libsnappy?

  File compression | Database | kdb+ and q documentation – Kdb+ and q documentation (kx.com)

• 

  voiddump

  Member

  January 16, 2024 at 12:00 am

  Uhm…Sorry I’m new to Github. I followed the links but I’m not quite sure what to do next. Do I choose one of these to download?

• 

  gyorokpeter-kx

  Member

  January 16, 2024 at 12:00 am

  There is an infobox below the table:

  To install Snappy or Lz4 on macOS, use a package manager such as Homebrew or MacPorts:

  # install with MacPorts sudo port install snappy +universal export LD_LIBRARY_PATH=/opt/local/lib

• 

  voiddump

  Member

  January 17, 2024 at 12:00 am

  Thanks for this! I’ve successfully installed MacPorts and snappy, however it still shows this error message. I suppose the path of Snappy might be wrong or unaccessible by KDB+. Is it so? How can I change the path?

   

• 

  voiddump

  Member

  January 17, 2024 at 12:00 am

  Thank you so much! I’ve addressed the problem.

  After continuous chats with GPT, I finally put Snappy in the right place. If anyone also encounters this problem, this is the solution given by GPT:

   

  1. **Verify Library Path:**
  Ensure that the directory containing the `libsnappy.dylib` library is in the system’s library path. You can add the directory to the library path by setting the `DYLD_LIBRARY_PATH` environment variable in your shell profile or script.export?DYLD_LIBRARY_PATH=/path/to/snappy/lib:$DYLD_LIBRARY_PATH

   

  2.**Check Your Snappy Place**:

  Type in the following code in the terminal:

  ”’

  port contents snappy

  ”’

  Mine returns:

  Port snappy contains:

    /opt/local/include/snappy-c.h

    /opt/local/include/snappy-sinksource.h

    /opt/local/include/snappy-stubs-public.h

    /opt/local/include/snappy.h

    /opt/local/lib/cmake/Snappy/SnappyConfig.cmake

    /opt/local/lib/cmake/Snappy/SnappyConfigVersion.cmake

    /opt/local/lib/cmake/Snappy/SnappyTargets-macports.cmake

    /opt/local/lib/cmake/Snappy/SnappyTargets.cmake

    /opt/local/lib/libsnappy.1.1.10.dylib

    /opt/local/lib/libsnappy.1.dylib

    /opt/local/lib/libsnappy.dylib

  So the path is /opt/local/lib/

  3. **Restart KDB+:**
  Restart your KDB+ session to apply the changes. Type in following codes:

  ”’
  cd /your/path/to/the/installation/of/kdb
  spctl –add q/m64/q
  xattr -d com.apple.quarantine q/m64/q
  DYLD_LIBRARY_PATH=/opt/local/lib ./q/m64/q

  ”’

  You can change the /opt/local/lib in the ‘DYLD_LIBRARY_PATH=’ to your path of the Snappy.

  This should solve the problem.

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