Installation is easy; cd to the src/ directory, then type this:

./configure
make

The compilation isn't real clean; readline seems to enjoy spamming
your screen.  Sorry about that.  Maybe I'll work on it a bit.
[It's not my fault -- I included the readline dist without change.
I'm surprised the Gnu code is so unportable.]

If you wish, you can edit src/Makefile.in before running ./configure.
It shouldn't be necessary unless you have some unorthodox request
(such as wanting to install tintin++ and its help file in /usr/local).