Compiling EXPO seems to work uncannilly well, with no compilcations (at least on SGI IRIX 6.2) if you following the instructions. The following is adequately described in the README.TXT file that comes with EXPO.

• When you receive the tar file (expo.tar), copy this into a directory where you would like this to be compiled and run from.
• extract the files from the tar file by using the command tar xvf expo.tar
• Then uncompress all the resulting compressed *.Z files by typing uncompress *.Z
• Copy the SirWare.* files into your home directory (cp SirWare.* ~/)
• Compile the program by running make -f file_name where the file_name refers to your computer/OS type refered to in the README.TXT file. i.e.,
  • for SGI: make -f makefile.sgi
  • for SUN: make -f makefile.sun
  • for LINUX: make -f makefile.linux
• Run the test file (expo cime) to make sure expo is working. You can them create an alias for the program in your .cshrc file or put this directory in your path so it can be called from anywhere on your system.

• One word of minor warning, if you are using programs such are expo and sir97 together, they seem to be using the SirWare.cfg@Local in different ways. One quick fix is to just delete the SirWare.cfg@Local before you run a different sirware package and it will generate a new SirWare.cfg@Local file.