gz_msgs ======= gz_msgs is a library that allows the transmission of messages to and from Java and C++ programs. gz_msgs currently requires libprotobuf-dev on Debian like systems. If it's not found via pkg-config, then it's build is diabled. You can force it by specifying -PforceGazebo on the gradle command line. If you are installing FRCSim with the script, then this *should* have be done for you.