Compiling MediaTomb for the Drobo

This guide assumes that you already have a cross-compiling environment setup such as the one described in Setup a Cross-Compile Environment for Drobo. I used this article Building MediaTomb for the Drobo using Ubunutu to get my system working and to create this guide.

This guide was created using MediaTomb 12.1 for Drobo FS.

# Activate/Enter the chroot

sudo schroot -c drobofs -d /root

# create a directory for downloaded archives (if you didn't already do so)

mkdir -p /root/download

# create mediatomb build directory (I use the application name)

mkdir -p /root/mediatomb

# create directory for resulting binaries (I use a target directory for this application build)

mkdir -p /root/mediatomb/arm

# Define the following environment variables for the application build directory

export CFLAGS="-I/root/mediatomb/arm/include -march=armv5te"
export CPPFLAGS=${CFLAGS}
export LDFLAGS="-L/root/mediatomb/arm/lib -Wl,-rpath -Wl,/mnt/DroboFS/Shares/DroboApps/mediatomb/lib"
export CC=arm-none-linux-gnueabi-gcc

Download Zlib from http://www.zlib.net/ to ~/download/.

# Download code
wget -P ~/download http://zlib.net/zlib-1.2.5.tar.gz
 
# Extract code 
cd ~/mediatomb
tar xfz ~/download/zlib-1.2.5.tar.gz
cd zlib-1.2.5
 
# configure, build, and install
./configure --prefix=/root/mediatomb/arm --shared
make
make install

Download Expat from http://sourceforge.net/projects/expat/.

# Download code
wget -P ~/download http://downloads.sourceforge.net/project/expat/expat/2.0.1/expat-2.0.1.tar.gz
 
# Extract code 
cd ~/mediatomb
tar xfz ~/download/expat-2.0.1.tar.gz
cd expat-2.0.1
 
# configure, build, and install
./configure --host=arm-none-linux-gnueabi --prefix=/root/mediatomb/arm
make
make install

Download SQLite from http://www.sqlite.org/download.html.

# Download code
wget -P ~/download http://www.sqlite.org/sqlite-amalgamation-3.6.23.1.tar.gz
 
# Extract code 
cd ~/mediatomb
tar xfz ~/download/sqlite-amalgamation-3.6.23.1.tar.gz
cd sqlite-3.6.23.1
 
# configure, build, and install
./configure --host=arm-none-linux-gnueabi --prefix=/root/mediatomb/arm
make
make install

Download File from http://www.darwinsys.com/file/. Note: The site admin removed the 4.24 version of file and I had issues compiling the latest versions, but download 4.24 from my link provided below.

# Download code
wget -P ~/download ftp://ftp.sunfreeware.com/pub/freeware/SOURCES/file-4.24.tar.gz
 
# Extract code 
cd ~/mediatomb
tar xfz ~/download/file-4.24.tar.gz
cd file-4.24

# Edit magic/Makefile.am in vi or some other editor

# Change line 224 from
${MAGIC}: $(EXTRA_DIST) $(FILE_COMPILE)
# to
${MAGIC}: $(EXTRA_DIST)

# generate build scripts
aclocal
autoheader
autoconf
libtoolize
automake
 
# configure, build, and install
./configure --host=arm-none-linux-gnueabi --prefix=/root/mediatomb/arm
make
make install

Download libexif from http://libexif.sourceforge.net.

# Download code
wget -P ~/download http://downloads.sourceforge.net/project/libexif/libexif/0.6.19/libexif-0.6.19.tar.gz
 
# Extract code 
cd ~/mediatomb
tar xfz ~/download/libexif-0.6.19.tar.gz
cd libexif-0.6.19
 
# configure, build, and install
./configure --host=arm-none-linux-gnueabi --prefix=/root/mediatomb/arm
make
make install

Download TagLib from http://developer.kde.org/~wheeler/taglib.html to ~/download/, I used taglib-1.6.3.tar.gz for this guide.

# Extract code 
cd ~/mediatomb
tar xfz ~/download/taglib-1.6.3.tar.gz
cd taglib-1.6.3
 
# configure, build, and install
./configure --host=arm-none-linux-gnueabi --prefix=/root/mediatomb/arm
make
make install

id3lib is available from http://id3lib.sourceforge.net/; however, since TagLib is being used it is not needed. See the mediatomb documentation for details on using id3lib if needed.

Download SpiderMonkey from http://ftp.mozilla.org/pub/mozilla.org/js/.

# Download code
wget -P ~/download http://ftp.mozilla.org/pub/mozilla.org/js/older-packages/js-1.5.tar.gz
 
# Extract code 
cd ~/mediatomb
tar xfz ~/download/js-1.5.tar.gz
# be tidy and rename the directory so the version is obvious
mv js js-1.5
cd js-1.5/src

# run make, this will fail on the first attempt
make BUILD_OPT=1 -f Makefile.ref CC=arm-none-linux-gnueabi-gcc LD=arm-none-linux-gnueabi-ld

# first copy jscpucfg to the target drobo and execute it. to generate jsautocfg.h

# NOTE: run this on the Drobo, NOT on the build system
./jscpucfg > jsautocfg.h

# copy the resulting jsautocfg.h back to your build system to replace the 0 byte version

# repeat make, should run successfully

make BUILD_OPT=1 -f Makefile.ref CC=arm-none-linux-gnueabi-gcc LD=arm-none-linux-gnueabi-ld

# there is no install target, so manually install

# from dir: js-1.5/src
mkdir /root/mediatomb/arm/include/smjs/
cp *.{h,tbl} /root/mediatomb/arm/include/smjs/
cp Linux_All_OPT.OBJ/*.h /root/mediatomb/arm/include/smjs/
cp Linux_All_OPT.OBJ/js /root/mediatomb/arm/bin/
cp Linux_All_OPT.OBJ/libjs.so /root/mediatomb/arm/lib/

Download MediaTomb from http://mediatomb.cc/pages/download#source_code.

# Download code
wget -P ~/download http://downloads.sourceforge.net/mediatomb/mediatomb-0.12.1.tar.gz
 
# Extract code 
cd ~/mediatomb
tar xfz ~/download/mediatomb-0.12.1.tar.gz
cd mediatomb-0.12.1
 
# Configure MediaTomb options
./configure --host=arm-none-linux-gnueabi --prefix=/root/mediatomb/arm \
--disable-rpl-malloc --disable-mysql --disable-libmp4v2 \
--disable-ffmpeg --disable-lastfmlib --disable-curl --disable-youtube --disable-libextractor \
--enable-external-transcoding --enable-inotify \
--with-taglib-cfg=/root/mediatomb/arm/bin/taglib-config \
--with-search=/root/mediatomb/arm --with-js-h=/root/mediatomb/arm/include/smjs 
 
# build and install
make
make install

The resulting mediatomb configuration would be the following:

sqlite3               : yes
mysql                 : disabled
libjs                 : yes
libmagic              : yes
inotify               : yes
libexif               : yes
id3lib                : disabled
taglib                : yes
libmp4v2              : disabled
ffmpeg                : disabled
ffmpegthumbnailer     : missing
lastfmlib             : disabled
external transcoding  : yes
curl                  : no
YouTube               : disabled
libextractor          : 
db-autocreate         : yes

The binaries creating during this build are now installed to /root/mediatomb/arm which can be packaged and transferred to the Drobo. Only the output bin, lib/*.so*, share/file, and share/mediatomb directories are required at runtime; so the other files can be excluded during transfer and packaging.

We need to create a startup script for the DroboApp. For the Drobo FS, the script is named service.sh and could look similar to the following sample:

#!/bin/sh
#
# mediatomb
 
. /etc/service.subr
 
prog_dir=`dirname \`realpath $0\``
 
# define DroboApp name and version 
name="mediatomb"
version="0.12.1"
# also define the admin port since mediatomb would randomly assign it otherwise
port=49152
 
pidfile=${prog_dir}/mediatomb.pid
logfile=${prog_dir}/mediatomb.log
 
# define the location of the shared libraries built for mediatomb
# runtime library path was set during compile, so this should not be needed
libdir=${prog_dir}/lib
if [ -n ${libdir} ]; then
	export LD_LIBRARY_PATH=${libdir}
fi
 
export MEDIATOMB_DATADIR="${prog_dir}/share/mediatomb"
export MEDIATOMB_MAGIC_FILE="${prog_dir}/share/file/magic"
 
# define the start command
start()
{
	# launch the mediatomb daemon using the specified port and some other options
	${prog_dir}/bin/mediatomb -d -m ${prog_dir} -f config -e eth0 -p ${port} \
		-P ${pidfile} --logfile ${logfile} >> ${logfile} 2>&1
}
 
# this standard stuff for service scripts
case "$1" in
start)
	start_service
	;;
stop)
	stop_service
	;;
restart)
	stop_service
	sleep 3
	start_service
	;;
status)
	status
	;;
*)
	echo "Usage: $0 [start|stop|restart|status]"
	exit 1
	;;
esac