Code to support testing in the Vicon lab
##Load Rasbian on the Pi
##Config wireless
##Build ZeroMQ
* There is no good package for ZMQ on the Raspberry Pi.
* For some reason I was not able to clone the repo and had to download the .tar.gz version in the releases section for version 4.0.7.
* The file autogen.sh in the home directory requires libtool and autoconf to build. Both of these are available via sudo apt-get install libtool autoconf.
* After these install then run ./autogen.sh. This should produce a configure script in the root directory of the source tree. Then follow standard linux .configure make sudo make install procedures.
* After the library built (about an hour between configure and make) I wrote the HelloWorld Server example on page 5 of the O'Reilly book. It compiled fine with the compiler directive gcc hello.c -lzmq, but IT DID NOT RUN THE EXECUTABLE AFTER IT COMPILED!
* It errored out like this:
$ ./a.out
./a.out: error while loading shared libraries: libzmq.so.4; cannot open shared object file: No such file or directory
* Found an example online where others had this same experience. Running `ldconfig` again solved the problem. I saw `ldconfig` run at the end of `sudo make install`, but apparently you need to run it one more time. Note on `ldconfig` on the pi...the normal `/etc/ld.so.conf` file includes all the files in the directory `/etc/ld.so.conf.d`. However one of those files already includes the `/usr/local/lib` directory where zmq installs. So there is no need to make any alterations to the source code...just run `sudo ldconfig`.
* After running the library config tool again, and then trying to run the test program it ran as expected!!!