Linux: libjpen-2.so

1. Download the source zip file and unpack it. You will have a new directory called jpen-2-150301.
2. Using a bash shell, go to the jpen-2-150301/c/linux directory and run:

   $ gcc -Wall -fpic -shared -o libjpen-2.so -lXi *.c

   You will get libjpen-2.so. You may need more -I options according to your environment.