android 编译问题总结

编译过程中出现error :

Communication error with Jack server (77), try 'jack-diagnose' or see Jack server log
Failed to contact Jack server: Problem reading /home/leo/.jack-server/server.pem. Try 'jack-diagnose'

Failed to contact Jack server: Problem reading /home/leo/.jack-server/server.pem. Try 'jack-diagnose'

解决：（多用户同时编译的error）

ps au|grep jack

sudo kill 9 XXXX

rm -rf ~/.jack*

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编译错误：

/usr/include/linux/errno.h:4:23: fatal error: asm/errno.h: No such file or directory

查看发现确实没有这个文件

解决：

ln -sv /usr/include/asm-generic /usr/include/asm 构建软链接

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编译错误：jack

Try increasing heap size with java option '-Xmx<size>'

解决：
export JACK_SERVER_VM_ARGUMENTS="-Dfile.encoding=UTF-8 -XX:+TieredCompilation -Xmx4g"

./prebuilts/sdk/tools/jack-admin kill-server 
./prebuilts/sdk/tools/jack-admin start-server

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单编译kernel

make kernel / make bootimage

单编译system

make systemimage

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编译出现错误：

G++ command not found

没有安装g++，或者版本不够（android 8.0好像需要G++ 4.9以及以上版本）

安装G++ 4.9方法：

sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo update-alternatives --remove-all gcc
sudo update-alternatives --remove-all g++
sudo apt-get install gcc-4.9
sudo apt-get install g++-4.9
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.9 20
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.9 20

gcc --version
g++ --version查看当前版本