1.先请确认ubuntu的版本，不同版本对应不同源，如下ubuntu20.04使用了bionic或者xenial的源，导致编译时存在问题，最后还是换focal源解决的
2.virtualbox虚拟机如果要在共享目录中编译，比较麻烦，因为软连接的问题，可以修改，或者虚拟机硬盘分大点估计要150G，包括源码包(清华离线包现在有96G，而且解压后未必能sync成功，建议还是直接多线程在线同步repo sync -j`nproc`，几个小时的事，不要搞的太复杂)
ubuntu虚拟硬盘扩容有几篇文章可以自己搜下，很麻烦，我直接重装重新分配的
3.使用repo init -u https://mirrors.tuna.tsinghua.edu.cn/git/AOSP/platform/manifest -b android-9.0.0_r9 --depth=1 --platform=auto
视需求是否要下载git日志，不带日志近40G，解压后近40G，删除压缩包后编译，产生大量目标文件占用巨大空间编译到80%已经增加了70G
所以，耗子尾汁。。。
更换清华源
/etc/apt/souces.list
https://mirrors.tuna.tsinghua.edu.cn/help/ubuntu/
# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security main restricted universe multiverse
# 预发布软件源，不建议启用
# deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse
mkdir ~/bin
PATH=~/bin:$PATH
sudo apt-get install curl
curl https://mirrors.tuna.tsinghua.edu.cn/git/git-repo > ~/bin/repo
chmod a+x ~/bin/repo
sudo apt-get install python
git config --global user.email "kuikuitage@163.com"
git config --global user.name "kuikuitage"
export REPO_URL=‘https://mirrors.tuna.tsinghua.edu.cn/git/git-repo/‘
repo init --depth=1 -u https://aosp.tuna.tsinghua.edu.cn/platform/manifest -b android-9.0.0_r51
repo sync -j`nproc`
安装openjdk8
sudo apt-get install -y libx11-dev:i386 libreadline6-dev:i386 libgl1-mesa-dev g++-multilib
sudo apt-get install -y git flex bison gperf build-essential libncurses5-dev:i386
sudo apt-get install -y tofrodos python-markdown libxml2-utils xsltproc zlib1g-dev:i386
sudo apt-get install -y dpkg-dev libsdl1.2-dev libesd0-dev
sudo apt-get install -y git-core gnupg zip curl zlib1g-dev gcc-multilib
sudo apt-get install -y libc6-dev-i386 x11proto-core-dev libx11-dev
sudo apt-get install -y unzip m4 lib32z-dev ccache libssl-dev
sudo apt-get install -y lib32ncurses5-dev
如有如下相关报错
将except getopt.GetoptError, e: 改为 except getopt.GetoptError as e:
print str(err)
等可能是python版本问题，python3.8会有符号问题，降低版本，卸载3.8版本
apt-get purge python3.8
apt-get updates
apt-get install python
或者已有旧版本直接改软链接
python软连接改成旧版本 ln -s /usr/bin/python2.x /usr/bin/python
apt-get purge python3.8
apt-get updates
apt-get install python
找不到c++报错
sudo apt-get install build-essential
libraries报错
lang.real: error while loading shared libraries: libncurses.so.5: cannot open shared object file: No such file or directory
sudo apt-get install libncurses5
source build/envsetup.sh
lunch 6
make -j16
如果遇到有其他问题，请自行google或者baidu