Building greylag requires Python version 2.5 or later, SWIG 1.3.31 or later, and reasonably recent versions of g++ and libstdc++, and make. Recent Linux distributions will likely have sufficiently new versions, but you may have to install some of them. Under Ubuntu or Debian Linux, this should suffice:
$ sudo apt-get install python{,-dev} swig g++ make
If you also want to run the test suite and build the documentation, add:
$ sudo apt-get install python-{nose,profiler,docutils}
$ sudo apt-get install texlive-latex-{extra,recommended} texlive-lang-french
Greylag was developed and tested on GNU/Linux, but in principle it should work (perhaps with minor modifications) under other flavors of Unix, Mac OS X, and Cygwin on Windows.
For a standard compile, just use
$ make
There are additional options you can try that might give a little extra speed--see the Makefile for more details.
Next, run the test suite:
$ make check
This will run a number of unit tests and several small searches.
Then
$ make install
will install to /usr/local/lib/greylag, or you can use
$ make DEST=/my/favorite/directory install
to install it elsewhere. Once it's installed, you can add this directory to your $PATH, or symlink the programs into an appropriate directory with a command like
$ cd /usr/local/bin $ ln -s ../lib/greylag/greylag-* .
(The programs must be able to find the module files: greylag.py and the cgreylag shared library. The easiest way to arrange this is to place them in the same directory as the programs, which the above steps accomplish.)
If greylag-chase --help gives you a usage message rather than a Python error, your installation is probably correct.
If you wish to install the documentation, which is a local copy of the website, use
$ cd doc $ make install ...or... $ make DEST=/my/doc/directory install