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• Mosqutto
  • Can be downloaded here.  Included in the link are instructions for various platforms.  Make sure in the end of installation the development libraries are available on your build path.
  • This is how one would do it in Ubuntu Linux 16.04
    
    • Enter the following commands:
      sudo apt-get update
      sudo apt-get install build-essential libssl-dev libc-ares-dev uuid-dev 
      mkdir ~/dev
      cd ~/dev
      wget http://mosquitto.org/files/source/mosquitto-1.4.10.tar.gz
      tar zxvf mosquitto-1.4.10.tar.gz
      cd mosquitto-1.4.10
      make
      sudo make install

With the above steps completed, run the following commands to get the sparkplug library and sample application:
cd ~/dev
git clone https://github.com/Cirrus-Link/Sparkplug.git
cd Sparkplug/client_libraries/c/
make
cd ~/dev/Sparkplug/sparkplug_b/stand_alone_examples/c/udt_example/

At this point the example.c file should be edited to properly reflect your MQTT server URL, port, credentials, etc.  Finally, build the application:
make