To build and install rsync $ ./configure $ make # make install You may set the installation directory and other parameters by options to ./configure. To see them, use: $ ./configure --help As of 2.4.7, rsync uses Eric Troan's popt option-parsing library. A cut-down copy of release 1.5 is included in the rsync distribution, and will be used it there is no popt library on your build host, or if the --with-included-popt option is passed to ./configure. HP-UX NOTES ----------- The HP-UX 10.10 "bundled" C compiler seems not to be able to cope with ANSI C. You may see this error message in config.log if ./configure fails: (Bundled) cc: "configure", line 2162: error 1705: Function prototypes are an ANSI feature. Install gcc or HP's "ANSI/C Compiler". MAC OSX NOTES ------------- Mac OS X (Darwin) seems to have an IPv6 stack, but it does not completely implement the "New Sockets" API. <http://www.ipv6.org/impl/mac.html> says that Apple do not support IPv6 yet. If your build fails, try again with --disable-ipv6.