These are the build instructions to rebuild the open source components
for a number of Sony Televions models. (For the exact model list, see
the web page where you obtained this file.)

Please note: rebuilding the source code and reinstalling the resulting
programs onto the device are not supported by our technical support
department! Installing modified software will void the product warranty!  

Pre-requisites:

Make sure you have at least 20G of free space for the build.

1. Install Ubuntu VERSION="14.04.6 LTS, Trusty Tahr"
 - 64-bit (AMD64) desktop image

2. package install
The build requires some i386 packages. Add the i386 architecture to
enable installation of these packages:

dpkg --add-architecture i386

Now install required packages, libraries and tools:

apt-get update
apt-get upgrade
apt-get install -y openssh-server nfs-common cifs-utils samba 
apt-get install -y expect pigz p7zip rar emacs ruby vim wget
apt-get install -y ntp
apt-get install -y openjdk-7-jdk
update-alternatives --config java
update-alternatives --config javac
apt-get install -y git gnupg flex bison gperf build-essential
apt-get install -y zip curl libc6-dev libncurses5-dev:i386 x11proto-core-dev
apt-get install -y libgl1-mesa-dev g++-multilib mingw32 tofrodos 
apt-get install -y python-markdown libxml2-utils xsltproc zlib1g-dev:i386 
apt-get install -y gawk libxml-libxml-perl 
apt-get install -y libx11-dev:i386
apt-get install -y libreadline6-dev:i386
apt-get install -y git make zlib1g-dev:i386 zip python-networkx
apt-get install -y git-core gnupg flex bison gperf build-essential
apt-get install -y zip curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386
apt-get install -y lib32ncurses5-dev x11proto-core-dev libx11-dev lib32z-dev ccache
apt-get install -y libgl1-mesa-dev libxml2-utils xsltproc unzip
apt-get install -y gitg git-gui lzop zlib1g-dev indent lftp lvm2 realpath 
apt-get install -y git-email enca vim elinks sshfs mingw32 bonnie++ doxygen gzip joe 
apt-get install -y libncurses5-dev libncurses5 libgmp3-dev libmpfr-dev libmpc-dev 
apt-get install -y libc6-dev-i386 libcloog-ppl-dev gawk libssl-dev dos2unix
apt-get install -y libz-dev
apt-get install -y liblz4-dev
apt-get install -y liblzo2-dev
apt-get install -y liblzma-dev
apt-get install -y binutils
apt-get install -y texinfo
apt-get install -y gettext
apt-get install -y cmake
apt-get install -y procmail bc
apt-get install -y pkg-config
apt-get install -y autoconf
apt-get install -y intltool libglib2.0-dev
ln -s /usr/lib/x86_64-linux-gnu/crt*.o /usr/lib
ln -sf /lib/i386-linux-gnu/libncurses.so.5 /usr/lib32/libncurses.so
ln -sf /lib/x86_64-linux-gnu/libncurses.so.5 /usr/lib/libncurses.so
ln -s /lib/x86_64-linux-gnu/libz.so.1 /usr/lib/libz.so

3. Configure to use 'bash' shell by default (instead of 'dash')
echo "dash dash/sh boolean false" | debconf-set-selections  &&  dpkg-reconfigure -p critical dash

4. Install automake-1.13
apt-get install -y autoconf
wget http://ftp.gnu.org/gnu/automake/automake-1.13.2.tar.gz
tar -xf automake-1.13.2.tar.gz && cd automake-1.13.2 && ./configure --prefix=/usr/automake && make && make install

5. Download cross-compiler
wget https://releases.linaro.org/archive/15.06/components/toolchain/binaries/4.8/arm-linux-gnueabi/gcc-linaro-4.8-2015.06-x86_64_arm-linux-gnueabi.tar.xz -O /tmp/gcc.tar.xz
cd /tmp/
tar -xf gcc.tar.xz
cd gcc-linaro-4.8-2015.06-x86_64_arm-linux-gnueabi/bin
export PATH=$(pwd):$PATH

6. Download the packages
Download the packages for the product from the same page where you obtained
this README_ENV.txt file.

7. Extract the source
Use tar to extract the contents of each source archive.
tar -xf <package-file>.tar.gz
It is recommended to create a separate directory for each archive that
you un-archive.

Each package includes a top-level README file that indicates dependencies
(packages that should be built *BEFORE* that package) and build
instructions.

8. Prepare installation directory
You can install the software whereever you would like, using the
installation scripts provided (usually 'make install'), or the
instructions in the README.  The READMEs usually direct you
to install the build output somewhere under /target_rootfs

Create your output directory before starting to build individual
packages.
mkdir /target_rootfs

8. Build each package
The README file provide build instructions and indicates dependencies
(packages that should be built *BEFORE* that packages).

Some packages have sub-packages (for example zlib) mentioned in
their build dependency list.  Make sure to untar the nested
archives and build all sub-packages or dependent packages first,
before building the main package.  Some dependencies refer to
other top-level packages, or to their sub-packages.

The following build order is recommended:
 * libusb
 * libusb-compat
 * libmtp-0.3.6
 * libmtp-1.1.6
 * fuse
 * simple-mtpfs
 * qrencode
 * e2fsprogs
 * mtd-utils-1.3.0-lzo-2.08
 * procps
 * linux
 * DirectFb
 * JavaScriptCore
 * gstreamer-builder
 * qt-everywhere
 * [remaining other packages]

IMPORTANT: Some of the build instruction indicate to set 
environment variables for a build (such as CFLAGS).  Make sure to
unset those environment variables at the end of each package
or sub-package build, to avoid using them incorrectly with
the next build.