Directories to Create

Untar bsu-3.0.2-tar.gz in /usr/local/src. This will create a directory,
/usr/local/src/bsu-3.0.2. Then make one of the following directories to do the build in:
 /usr/local/src/bsu+plplot
 /usr/local/src/bsu+gnuplot
Choose which way to build and install.