For Java installation instructions, see doc/java_install.

Prior to building libabac you must install libstrongswan.

Download strongswan-4.4.0 from strongswan.org:
    http://download.strongswan.org/strongswan-4.4.0.tar.bz2

FreeBSD users: add --with-group=wheel to strongswan ./configure

Linux users: add --disable-gmp --enable-openssl to strongswan ./configure
to avoid long credential creation times. The entropy sources
libstrongswan uses by default gather entropy slowly on Linux.  These
flags allow it to gather entropy from the same sources as openssl, which
is noticeably faster.

$ tar xjvf strongswan-4.4.0.tar.bz2
$ cd strongswan-4.4.0
$ # see note above about configure flags
$ ./configure --enable-monolithic 
$ cd src/libstrongswan
$ make && sudo make install

Be sure to make note of the directory into which you've untarred
strongswan-4.4.0.tar.bz2. You will use this in the next step.

BUILDING LIBABAC

$ STRONGSWAN_SRC_DIR=path/to/strongswan-4.4.0
$ ./configure --with-strongswan=$STRONGSWAN_SRC_DIR
$ make && sudo make install