The android Build

Trials and tribulations getting an Android source tree to build.

• Spin up an Ubuntu 14.04 instance on Google Cloud - done. (that's detailed here ->)
• Install git so we can talk to google and android repos - done. (sudo apt-get install git ; git config --global user.name "Mark van der Pol"; git config --global user.email "mark@van-der-pol.org")
• Now- different options exist -
  • Docker instance. (get https://android.googlesource.com/platform/build/+/master/tools/docker/Dockerfile > Dockerfile )
    • references: https://source.android.com/setup/build/older-versions
    • references: https://android.googlesource.com/platform/build/+/master/tools/docker
    • 18 curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
    • 19 sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
    • 20 sudo apt-get update
    • 21 apt-cache policy docker-ce
    • 22 sudo apt-get install docker-ce
    • 15 docker build --build-arg userid=$(id -u) --build-arg groupid=$(id -g) --build-arg username=$(id -un) -t android-build-trusty . 24 history
    • mark@android-build-v6-0:~$
    • And I got lost or stuck. So go on to ...
  • raw install
    • Inside the docker build script there is some gold - just pick those out and apply locally. For example:

• Now to get the disk with the sources attached. Needed to shut instance down, destroy another to free it's disk, attach as an extra disk, start the instance, and manually mount the attached disk.
• sudo mkdir /media/src
• sudo mount /dev/sdb1 /media/src
• then to muck about making symbolic links so my home dir in the instance has an easy link to the rather haphazard place it got stuffed in that other disk image.
• in the foreign disk, it is at /home/mark/dev/blu, so cd /media/src; ln -s blu home/mark/dev/blu
• and finally, in my actual home directory link to the provide hop into the foreign disk. cd ~;ln -s blu /media/src/blu
• The repo cmd is happy, and lunch in ~/blu works. Dont forget to do build/setenv.sh before proceeding. or to switch to sudo -s
• needed to patch one makefile, as documented here, but essentially add

• to the CLANG_CONFIG_x86_LINUX_HOST_EXTRA_ASFLAGS in core/clang/HOST_x86_common.mk
• finally, there was a virtual memory error. not sure why with 30GB of main memory, but OK, add some swap file space. here goes:

• and then modify the /etc/fstab to remount these after a reboot. While there, add the foreign disk so that happens automatically in the future as well. Add /media/src/swapfile none swap sw 0 0
• and finally, make -j
• this fires up make across all cores available, in this case 32! A mere 3 hours later the build will complete.