5. Last step : compiling and installing the Apache module
A possibly helpful note for rank beginners like me: this got me a working Apache on Ubuntu:
sudo apt-get install apache2 apache2.2-common apache2-mpm-prefork apache2-utils apache2-threaded-dev ssl-cert
On that system the relevant command names are apache2ctl and apxs2, and the document root is /var/www (not /usr/local/apache/htdocs as in the example below).
(you will need httpd-devel and gcc)
Get the source of the module (adaptor) from Wonder. You only need the Adaptors (and its subfolders) folder.
Edit make.config and change the value of ADAPTOR_OS to LINUX. (this can be found in Adaptors directory (JS))
<Directory "/opt/Local/Library/WebServer/Documents/WebObjects"> AllowOverride All Order allow,deny Allow from all </Directory>
Or (depending on your Apache configuration) you could use a symbolic link.
You also need, as explained by the adaptor's README file, to add this directive in httpd.conf :