I have tried to provide some pointers for creating the binary on most UNIX machines. I have compiled it on all of these successfully. Please read the notes below. If you are still unable to compile it, then let me know. Type make clean first.
New versions have a simplified compilation.
Just untar it and type make in the main xpp directory. If errors occur, then you will still have to fix the make files. I have included as part of this distribution a modified version of the f2c libraries but they do not seem to work on every machine. If you find that they do not work then you will need to ftp f2clib.tar.Z also in the same directory. Note that my reduced f2c seems to work on everything these days.