Check out Viengoos and switch to the viengoos-on-bare-metal branch (all development is currently done on this branch and it will eventually be merged into the master branch):
$ git clone git://git.savannah.gnu.org/hurd/viengoos.git
$ cd viengoos
$ git checkout -b viengoos-on-bare-metal origin/viengoos-on-bare-metal
Generate the autoconf environment (note that --force is not specified as we have our own version of config.guess and config.sub):
$ autoreconf -i
Configure a build directory:
$ mkdir build
$ cd build
$ ../configure --host=x86_64-pc-viengoos-gnu --with-newlib
Now, build Viengoos. Running make the first time will automatically fetch binutils and gcc from the Internet and build a cross compiler. Running make again will build the Viengoos proper. Again, the build process with fetch several tarballs including Newlib, the Boehm GC and Sqlite.
$ make
...
The cross compiler is now set-up. Re-run `make' and proceed as usual.
make[2]: Leaving directory `.../viengoos/build'
make[1]: Leaving directory `.../viengoos/build'
$ make
Booting Using QEMU
To boot Viengoos, use Grub 2. You cannot use Grub Legacy: Viengoos is an ELF64 executable, which Grub Legacy does not support.
First, check out Grub 2 from svn:
$ svn co svn://svn.savannah.gnu.org/grub/trunk/grub2
$ cd grub2
Before building Grub 2, you should apply the following patch, which makes it easy to tell Grub to load a specific grub.cfg at start up (details).
$ wget http://www.gnu.org/software/hurd/microkernel/viengoos/grub2-config.diff -O /dev/stdout | patch -p0
Next, build Grub 2:
$ ./autogen.sh
$ mkdir build
$ cd build
$ ../configure --prefix=`pwd`/../install
$ make && make install
Create the boot disk:
$ cd ../install
$ bin/grub-mkrescue boot.img --configfile="(hd0,1)/grub.cfg" --image-type=floppy --modules='help reboot serial multiboot pc configfile normal boot fat'
Now, create /viengoos and link viengoos and hieronymus into that directory:
$ mkdir /viengoos
$ cd /viengoos
$ ln -s ~/viengoos/build/viengoos/viengoos.stripped viengoos
$ ln -s ~/viengoos/build/hieronymus/hieronymus.stripped hieronymus
Also, create a grub.cfg file in /viengoos/grub.cfg:
set timeout=1
set default=0
set root=hd0,1
menuentry "Viengoos" {
multiboot /viengoos -D 3 -o serial
module /hieronymus
}
NB: If you edit grub.cfg and a backup file called grub.cfg~ is created, qemu will use grub.cfg~ instead of grub.cfg! Thus, after editing grub.cfg, be sure to delete any grub.cfg~ file!
Finally, boot!
$ qemu-system-x86_64 -serial stdio -fda ~/grub2/install/boot.img -hda fat:/viengoos -boot a
By default, Hieronymus is configured to load ruth, a test suite. Ruth can take a long time to complete.