The ISODE-8.0 upper layer OSI stack library and ASN.1 compiler
pepsy required for OSIMIS compile with GNU gcc version 4.0.2 on linux.

The archive isode-8.0.5.tar contains the original isode-8.0
source archive and 5 patch archives. You should extract
the files from those archives, starting from isode-8.tar.gz
and continuing with the 5 patches isode-8-patch?.tar.gz in
the right order.

There is information on making isode in isode-8.0/READ-ME.
In short, the following steps need to be followed:

% cd isode-8.0
% cp config/linux.h h/config.h
% cp config/linux.make config/CONFIG.make
% cp config/*.local support/
% ./make

This will build libraries and programs. You should
move libisode.a and pepsy/xpepsy in a directory
from where they will be accessible and then clean the isode tree.
Note also that the ASN.1 compiler pepsy program should be renamed
pepsy (from xpepsy):

% mv libisode.a ..
% mv pepsy/xpepsy ../pepsy
% ./make clean