compile aosp 9.0 (P) for hikey970记录

编译AOSP for hikey970

compile aosp 9.0 （P）for hikey970记录

编译AOSP for hikey970

编译时主要参考网站的帖子：
http://www.arm-cn.com/thread-1208-1-1.html
两个重要的官方参考网站：
https://www.96boards.org/documentation/consumer/hikey/hikey970/build/aosp.md.html
https://www.96boards.org/documentation/consumer/hikey/hikey970/build/linux-kernel.md.html
官网：

repo init -u https://android.googlesource.com/platform/manifest -b master   

帖子：

repo init -u https://aosp.tuna.tsinghua.edu.cn/platform/manifest -b android-9.0.0_r8 --no-repo-verify --repo-branch=stable

获取源码的方式不同，我们在宿舍下载aosp.tar后解压到aosp目录。
一般，先在宿舍在镜像源下载最新版本的aosp。repo init -u https://aosp.tuna.tsinghua.edu.cn/platform/manifest
进入aosp路径后：

git clone https://github.com/96boards-hikey/android-manifest.git -b hikey970_v1.0 .repo/local_manifests       
repo sync -j8 
cd /mnt/hikey970/aosp/device/linaro/hikey    
vim manifest.xml    

在倒数第二行增加关于wifi的设置

<hal format="hidl">
        <name>android.hardware.wifi.hostapd</name>
        <transport>hwbinder</transport>
        <version>1.0</version>
        <interface>
            <name>IHostapd</name>
            <instance>default</instance>
        </interface>
    </hal>

vim /mnt/hikey970/aosp/device/linaro/hikey/sepolicy/hostapd.te
其中关于wifi的设置全部注释掉

$ mkdir $AOSP_ROOT/bootloader    
$ sudo apt install uuid-dev build-essential    
$ sudo apt install libssl-dev    
$ git clone https://github.com/96boards-hikey/tools-images-hikey970.git    
$ git clone https://github.com/96boards-hikey/OpenPlatformPkg.git -b hikey970_v1.0    
$ git clone https://github.com/96boards-hikey/arm-trusted-firmware.git -b hikey970_v1.0    
$ git clone https://github.com/96boards-hikey/l-loader.git -b hikey970_v1.0    
$ git clone https://github.com/96boards-hikey/edk2.git -b hikey970_v1.0    
$ git clone https://github.com/96boards-hikey/uefi-tools.git -b hikey970_v1.0    
$    
$ cd edk2    
$ ln -sf ../OpenPlatformPkg    

我也有修改交叉编译的路径：

$ cd $AOSP_ROOT/bootloader/l-loader

vim build_uefi.sh                 
-       AARCH64_GCC_7_1=/o