The source code is available from the Launchpad project here. The easiest way to get the code is with bzr branch of the desired release, such as the following:
bzr branch lp:percona-xtrabackup/1.6
bzr branch lp:percona-xtrabackup
You should then have a directory named after the release you branched, such as percona-xtrabackup.
The following packages and tools must be installed to compile Percona XtraBackup from source. These might vary from system to system.
In Debian-based distributions, you need to:
$ apt-get install build-essential flex bison automake autoconf bzr \ libtool cmake libaio-dev mysql-client libncurses-dev zlib1g-dev
In RPM-based distributions, you need to:
$ yum install cmake gcc gcc-c++ libaio libaio-devel automake autoconf bzr \ bison libtool ncurses5-devel
Once you have all dependencies met, the compilation is straight-forward with the bundled build.sh script in the utils/ directory of the distribution.
The script needs the codebase for which the building is targeted, you must provide it with one of the following values or aliases:
Value Alias Server innodb51_builtin 5.1 build against built-in InnoDB in MySQL 5.1 innodb51 plugin build agsinst InnoDB plugin in MySQL 5.1 innodb55 5.5 build against InnoDB in MySQL 5.5 xtradb51 xtradb build against Percona Server with XtraDB 5.1 xtradb55 xtradb55 build against Percona Server with XtraDB 5.5
Note that the script must be executed from the base directory of XtraBackup sources, and that directory must contain the packages with the source code of the codebase selected. This may appear cumbersome, but if the variable AUTO_LOAD="yes" is set, the build.sh script will download all the source code needed for the build.
At the base directory of the downloaded source code, if you execute
$ AUTO_DOWNLOAD="yes" ./utils/build.sh xtradb
and you go for a coffee, at your return XtraBackup will be ready to be used. The xtrabackup binary will located in the following subdirectory depending on the building target:
Target Location innodb51_builtin mysql-5.1/storage/innobase/xtrabackup innodb51 mysql-5.1/storage/innodb_plugin/xtrabackup innodb55 mysql-5.5/storage/innobase/xtrabackup xtradb51 Percona-Server-5.1/storage/innodb_plugin/xtrabackup xtradb55 Percona-Server-5.5/storage/innobase/xtrabackup