The CGI++ Download is a single gzipped tar file, cgi.tar.gz. Note that it will NOT create its own directory when you unpack it. We recommend you create a new directory for CGI++, and unpack it there.
CGI++ will now install with minimum effort:
[unpack cgi.tar.gz in a CGI++ directory] make make install (AS ROOT) make clean (or distclean)
It is strongly recommended that you read the README, especially before using make install.