This is the GNU Hurd, <http://www.gnu.org/software/hurd/>. Welcome. GNU Hurd runs on 32-bit x86 machines. A version running on 64-bit x86 (x86_64) machines is in progress. Volunteers interested in ports to other architectures are sought; please contact us (see below) if you'd like to help. To compile the Hurd, you need a toolchain configured to target i?86-gnu; you cannot use a toolchain targeting GNU/Linux. Also note that you cannot run the Hurd "in isolation": you'll need to add further components such as the GNU C Library (glibc), to turn it into a runnable system. Recent versions of Mach, MIG, glibc, and GCC are required. Optionally, a Sun RPC implementation is needed to build the NFS translator and daemon: glibc Configured with --enable-obsolete-rpc. TI-RPC Currently fails to build on GNU, see <http://lists.debian.org/debian-hurd/2010/12/msg00007.html>. Obviously, you also need somewhat recent versions of binutils, make, bash and some other tools. No hard requirements are currently known for these, though. For instructions on compiling and installing the GNU Hurd from an already running Hurd system, see the file `INSTALL'. It is possible to cross-build the Hurd; the file INSTALL-cross contains some past instructions for doing so, but it's too much trouble to maintain these instructions and keep them up to date. Your best bet is to start with a running Hurd system already. If you do decide to cross compile, you will need to examine the instructions in INSTALL for building Mach, libc, and the Hurd together, and follow them. The instructions in INSTALL-cross are quite out-of-date, but they contain some useful hints buried amongst the errors, so we have left the file for those who find it useful. Please note that this directory also contains a fair amount of not-yet-working code. By default, the makefiles build only the working code. The GNU Hurd is free software. All of it, including the libraries in this distribution, is covered by the GNU General Public License, found in the file COPYING. Please read the FAQ at <http://www.gnu.org/software/hurd/faq.html>. Bug reports should be sent to <firstname.lastname@example.org> or filed on <http://savannah.gnu.org/bugs/?group=hurd>. Requests for assistance should be sent to <email@example.com> or filed on <http://savannah.gnu.org/support/?group=hurd>. You can also find us on the Freenode IRC network in the #hurd channel.