This project provides helper shell scripts which allow to build Android Marshmallow for the Odroid-C2 board on Ubuntu 18.04 from the source provided by Hardkernel. The sequence of actions follows the guidelines provided for building Android image for this board, but they were extended so that the build process could be successful on the chosed OS and verson.

The implemented process downloads tools and sources in the directory you cloned this repository in and uses them to allows you completing the build process in fairly isolated manner.

Assumptions:

• you have cloned this source locally ( I'm assuming in this example under './odroid-c2-marshmallow-helper') and you are inside it.
• (if necessary) you have made all .sh files executable ('chmod 755 ./*.sh').

Suggested sequence of use for the helper scripts is:

user@host odroid-c2-marshmallow-helper> ./preconfigure.sh
user@host odroid-c2-marshmallow-helper> ./init-marshmallow.sh
user@host odroid-c2-marshmallow-helper> ./build-marshmallow.sh

This script takes care of:

• downloading and extracting necessary toolchains for u-boot and kernel compilation - placed under ./toolchain sub-folder.
• downloading, extracting and configuring standalone OpenJDK 1.7 - placed under ./openjdk7-7u171-x64 sub-folder. The source of this package comes from the Slackware package repository since it was easier to extract, configure and use it in standalone form.
• downloading and extracting the 'repo' CLI tool - placed under ./repo sub-folder.

This script takes care of:

• downloading the Odroid-C2 source for Android Marshmallow - placed under ./marshmallow sub-folder. Currently this action is done using 'anonymous' identity for Git operations. Please, change this in the script if you need to.
• applying all *.diff files it finds in the root repository folder over the ./marshmallow sub-folder. The *.diff files are assumed to be produced by the repo diff command and appied using the apply_repo_diff.sh script.

This script requires for the preconfigure.sh and init-marshmallow.sh scripts to have been executed and completed sucessfully.

This script takes care of:

• setting/extending the appropriate environment variables for the build process.
• cleaning the build tree after a previous run.
• triggering the build process as described in the guidelines for building Android. The 'make' build is triggered explicitly with a single job CLI option ('-j 1') to avoid parallel jobs, since the latter leads to failures in my environment.

This script requires for the preconfigure.sh and init-marshmallow.sh scripts to have been executed and completed sucessfully.

This script takes care of manually cleaning the build tree after build-marshmallow.sh has run.

This script provides automation for applying .diff files produced by the repo diff command. It can be invoked by:

apply_repo_diff.sh <absolute path to the folder with repo diff files to apply> <absolute path to the project root folder>

Each .diff file is split into pieces through the lines, containing 'project' definitions and then these splits are applied to the Android source tree under the ./marshmallow sub-folder.

• 001-force-single-threaded-make-build.diff
• 002-fix-recovery-busybox.diff
• 003-force-full-range-color-hdmi.diff