Here is a small howto, that will lead you through building PVR-XBMC from subversion.

Checking out PVR-XBMC via svn.
svn co "http://xbmc.svn.sourceforge.net/svnroot/xbmc/branches/pvr-testing2"

Then goto where ever you checked the pvr-testing2 out
cd pvr-testing2
./bootstrap && \\
./configure --prefix=$HOME/testing/$(svn info | grep -i revision | cut -d" " -f2) && \\
make -j2 && \\
make install

Here is a little function I wrote to update the PVR when ever I need. (in my case it’s in ~/.zshrc) 

function update_xbmc () {
CURRENTPATH=$(pwd)
mkdir -p ~/testing
cd ~/src/XBMC
echo -n "Checking for changes in SVN "
svn update
REVISION=$(svn info | grep -i revision | cut -d" " -f2)
if [ -d $HOME/testing/$REVISION ] >/dev/null
    then
           echo noting to update
    else
           echo building $REVISION export CFLAGS="-O0 -g"
           ./configure --prefix=$HOME/testing/$REVISION && \\
           make -j2 && \\
           make install
           if [ $? -eq 0 ]
               then
                     echo linking
                     cd $HOME/bin
                     ln -sf ../testing/$REVISION/bin/xbmc xbmc-$REVISION
                     ln -sf xbmc-$REVISION xbmc-latest
                     echo -e "XBMC Revision $REVISION has been build. $HOME/testing/$REVISION t enjoy"
           fi
fi
cd $CURRENTPATH }