Thanks, will try:
ran sudo apt-get install json-c libcurl4-openssl-dev
got
E: Unable to locate package json-c

Any idea why I'm getting this error with the prebuild pi binary?

pi@raspberrypi:~/domoticz/scripts/evo $ ./evo-client --init
./evo-client: /usr/lib/arm-linux-gnueabihf/libstdc++.so.6: version `GLIBCXX_3.4.21' not found (required by ./evo-client)