How to download and build LineageOS 15.1 for A3 2016

Debian-based OS

Follow there's commands :

# Update APT sources
sudo apt-get update

# Installing JDK
sudo apt-get install openjdk-8-jdk

# Installing most of dependencies for AOSP
sudo apt-get install git-core gnupg flex bison gperf build-essential zip curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386 lib32ncurses5-dev x11proto-core-dev libx11-dev lib32z-dev ccache libgl1-mesa-dev libxml2-utils xsltproc unzip

# Installing 'repo'
mkdir ~/bin
echo "PATH=~/bin:$PATH" >> ~/.bashrc
curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
chmod a+x ~/bin/repo
. ~/.bashrc

# Establish working environment
mkdir LineageOS
cd LineageOS/

# Configure git
git config --global user.name "Your Name"
git config --global user.email "[email protected]"

# Syncing LineageOS repositories/sources (~25 to 30GB)
repo init -u git://github.com/LineageOS/android.git -b lineage-15.1

# Launch the sync
repo sync

# Add our manifest
# put our manifest (find it in sidebar) into a file at ~/LineageOS/.repo/local_manifests/a3xeltexx.xml
# Then you can relaunch "repo sync" to add changes

# Build OS
source build/envsetup.sh

brunch lineage_a3xeltexx-eng
# ^ for engineer builds (debugging preferred) ^
brunch lineage_a3xeltexx-userdebug
# ^ for production and smaller debug mode ^