The goal of this article is to guide you through compiling and running Barrelfish inside QEMU, and to write and run programs on Barrelfish itself. The instructions below assume you are using a recent version of Linux.

Getting Barrelfish

First we need to get the latest version of Barrelfish from the mercurial repository. Use the following command:

hg clone http://hg.barrelfish.org

or, if you are using an HTTP proxy:

hg --config http_proxy.host=ipOfYourProxyServer:portOfYourProxyServer --config http_proxy.user=user --config http_proxy.passwd=password clone http://hg.barrelfish.org

Once you have cloned the repository, cd into it, create a build directory, and enter it:

cd hg.barrelfish.org
mkdir build
cd build

Then create the required makefile:

../hake/hake.sh -s .. -a x86_64

or, if you wish to build the 32-bit version:

../hake/hake.sh -s .. -a x86_32

• Note: If you get the following error:

      ../hake/Main.hs:369:25:
          Not in scope: data constructor `Opt_DeriveDataTypeable'

  Apply the following patch to hake/Main.hs: Main.hs.patch

Now we can build Barrelfish:

make

To speed things up you can specify a number of jobs. This should be roughly the same as the number of cores, so on a 4-core machine you could use:

make -j 4

Once that has completed, you can issue the following command to run Barrelfish on QEMU:

make sim

To allocate more cores to QEMU, instead of the default 2, you can edit the symbolic_targets.mk file in the build directory. Do this by editing the QEMU_CMD line for the architecture you've chosen for Barrelfish.