MacBooK pro编译Android 9.0和Android 11源码

当前设备环境

操作系统：macOS Mojave 10.14.6

手机：谷歌手机Pixel Pixel 3 XL

下载源码版本：android-9.0.0_r46 android-11.0.0_r17

创建磁盘映像

由于mac系统文件系统是大小写不敏感的系统，所以需要在mac中创建一个支持大小写敏感的文件系统。

创建分区

安卓9.0编译后比较大,笔者编译完成占用了140多G的空间,所以建议直接设置150G

sudo hdiutil create -type SPARSE -fs 'Case-sensitive Journaled HFS+' -size 150g ~/android.dmg
挂载分区

sudo hdiutil attach ~/android.dmg.sparseimage -mountpoint /Volumes/android
卸载分区

hdiutil detach /Volumes/android
进入分区

cd /Volumes/android
改变分区大小

hdiutil resize -size <new-size-you-want>g ~/android.dmg.sparseimage

为了方便mount分区，在~/.bash_profile添加一个mountAndroid的函数：

mountAndroid() { hdiutil attach /Users/xxx/android.dmg.sparseimage -mountpoint /Volumes/android/android9; }

安装Repo工具

创建目录： mkdir ～/bin
写入到path中： PATH=～/bin:$PATH
下载Repo

curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo

chmod a+x ~/bin/repo
将Repo中的下载地址改为清华大学的镜像源。编辑~/bin/repo 文件，修改REPO_URL为的源地址

export REPO_URL='https://mirrors.tuna.tsinghua.edu.cn/git/git-repo/'
初始化repo

cd /Volumes/android/android9

repo init -u git://mirrors.ustc.edu.cn/aosp/platform/manifest -b android-9.0.0_r46 --depth=1 --platform=auto

我的设备是google pixel，在https://source.android.google.cn/setup/start/build-numbers#source-code-tags-and-builds查看android P分支支持的机型，r46支持pixel，因此选择了r46版本。

repo init推荐使用-b 分支标签、--depth=1和--platform=auto这几个选项加快速度。

执行repo命令进行下载源码

编写脚本下载源码

sync.sh

#!/bin/bash
repo sync -j4 --current-branch
while [ $? = 1 ]; do
echo "================sync failed, re-sync again ====="
sleep 3
repo sync -j4 --current-branch
done

repo sync推荐使用--current-branch选项加快速度

下载代码非常漫长，期间有一些打印：

报错详情

error: RPC failed; curl 18 transfer closed with outstanding read data remaining 
fatal: The remote end hung up unexpectedly 
fatal: early EOF 
fatal: index-pack failed

根据的解决方案https://blog.csdn.net/weixin_40355324/article/details/84845678，我这边添加了下面的指令：

git config --global https.postBuffer 2428800000

注意：是https而不是http

经过将近10个小时后下载完毕。

清华镜像还有一种拉取代码的方法，直接下载压缩包： https://mirrors.tuna.tsinghua.edu.cn/aosp-monthly/

参考https://mirrors.tuna.tsinghua.edu.cn/help/AOSP/

下载完毕后，如果容量有限,此时可以删除掉.repo文件了.

谷歌手机设备驱动的下载

Pixel binaries for Android 9.0.0 (PQ3A.190801.002)

Hardware Component	Company	Download	SHA-256 Checksum
Vendor image	Google	Link	5b9429aa3eacc15351d2c15cf4d0a59cc200fb91645519aae79c081e47908aab
GPS, Audio, Camera, Gestures, Graphics, DRM, Video, Sensors	Qualcomm	Link	2d7ddecb494aa9b17705689d7dcaad8e1c1a51f659b67920c056a905649cc6bf

在 https://source.android.google.cn/setup/start/build-numbers#source-code-tags-and-builds 查看代码版本所对应的硬件驱动

PQ3A.190801.002	android-9.0.0_r46	Pie	Pixel 3 XL、Pixel 3、Pixel 2 XL、Pixel 2、Pixel XL、Pixel	2019-08-01

然后你会得到两个文件tgz的压缩文件，把这两个文件放到下载好的源码根目录，用tar -zxvf + 文件名,解压出来，得出两个sh文件,然后执行两个文件。我的是extract-qcom-sargo.sh和extract-google_devices-sargo.sh，执行命令为

./extract-google_devices-sargo.sh

./extract-qcom-sargo.sh

其中在执行时，需要输入键盘ENTER和输入I ACCEPT

编译Android源码

由于我之前编译过android8.1的源码，所以执行下面的命令后一次性就编译通过了，但之前编译Android8.1的时候需要搭建一些环境,参考

MacBooK pro编译Android 8.1源码

Mac OS10.12 编译Android源码8.1

source build/envsetup.sh

lunch

lunch后会列出一个编译的设备表，pixel对应的是47. aosp_sailfish-userdebug

因此lunch后选择输入47，然后就执行下面的make指令，开始经过漫长的编译。奇怪的是，我编译android P才花费了2个多小时。

make update-api -j && make -j8

编译成功的log：

Warning: request a ThreadPool with 1 threads, but LLVM_ENABLE_THREADS has been turned off
[ 99% 83900/84495] Target boot image from recovery: out/target/product/sailfish/boot.img
cp: out/target/product/sailfish/root/init.recovery.*.rc: No such file or directory
[ 99% 83913/84495] //art/dexlayout:libart-dexlayout link libart-dexlayout.so
Warning: request a ThreadPool with 1 threads, but LLVM_ENABLE_THREADS has been turned off
[ 99% 83926/84495] //art/runtime:libart link libart.so [arm]
Warning: request a ThreadPool with 1 threads, but LLVM_ENABLE_THREADS has been turned off
[ 99% 83970/84495] //art/dexlayout:libart-dexlayout link libart-dexlayout.so [arm]
Warning: request a ThreadPool with 1 threads, but LLVM_ENABLE_THREADS has been turned off
[ 99% 83977/84495] //frameworks/base/libs/hwui:libhwui link libhwui.so
Warning: request a ThreadPool with 1 threads, but LLVM_ENABLE_THREADS has been turned off
[ 99% 83979/84495] //frameworks/base/libs/hwui:libhwui link libhwui.so [arm]
Warning: request a ThreadPool with 1 threads, but LLVM_ENABLE_THREADS has been turned off
[ 99% 84018/84495] //art/compiler:libart-compiler link libart-compiler.so
Warning: request a ThreadPool with 1 threads, but LLVM_ENABLE_THREADS has been turned off
[ 99% 84467/84495] //art/compiler:libart-compiler link libart-compiler.so [arm]
Warning: request a ThreadPool with 1 threads, but LLVM_ENABLE_THREADS has been turned off
[ 99% 84480/84495] //art/dex2oat:dex2oat link dex2oat [arm]
Warning: request a ThreadPool with 1 threads, but LLVM_ENABLE_THREADS has been turned off
[100% 84495/84495] Install system fs image: out/target/product/sailfish/system.img

#### build completed successfully (02:38:57 (hh:mm:ss)) ####

编译成功后就在源码根目录生成了一个out目录，里面是编译的产物。代码加编译产物加起来117G。

刷入手机

编译系统完成后，在out/target/product/sailfish/目录下，能看到很多.img后缀的文件，此时，就可以愉快的刷机了。

手机进入开发者选项，打开OEM解锁，打开USB调试
执行adb reboot bootloader进入bootloader模式（需要安装Android SDK并配置环境变量）
进入bootloader模式后，需要解锁bootloader，执行fastboot flashing unlock，手机会进入到解锁页面，用音量上下键选中unlock选项，使用电源键确认。
解锁bootloader之后，再次执行adb reboot bootloader进入bootloader模式
执行下面的指令：

export ANDROID_PRODUCT_OUT=/Volumes/android/android9/out/target/product/sailfish
执行fastboot flashall -w

xxxMacBook-Pro:android9 xxx$ fastboot flashall -w
ERROR: Couldn't create a device interface iterator: (e00002bd)
ERROR: Couldn't create a device interface iterator: (e00002bd)
ERROR: Couldn't create a device interface iterator: (e00002bd)
--------------------------------------------
Bootloader Version...: 8996-012001-1908071822
Baseband Version.....: 8996-130361-1905270421
Serial Number........: FA6CG0300776
--------------------------------------------
Checking product
OKAY [  0.050s]
target reported max download size of 536870912 bytes
mke2fs 1.43.3 (04-Sep-2016)
Creating filesystem with 6509568 4k blocks and 1630208 inodes
Filesystem UUID: 03fba336-a6bc-478b-9089-64f6ca8c5daa
Superblock backups stored on blocks:
	32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
	4096000

Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

Sending 'boot_a' (29897 KB)...
OKAY [  0.901s]
Writing 'boot_a'...
OKAY [  0.294s]
Erasing 'system_a'...
OKAY [  0.362s]
Sending sparse 'system_a' 1/2 (524284 KB)...
OKAY [ 14.457s]
Writing 'system_a' 1/2...
OKAY [  3.502s]
Sending sparse 'system_a' 2/2 (379180 KB)...
OKAY [ 10.150s]
Writing 'system_a' 2/2...
OKAY [  2.550s]
Erasing 'system_b'...
OKAY [  0.596s]
Sending 'system_b' (33348 KB)...
OKAY [  1.045s]
Writing 'system_b'...
OKAY [  0.316s]
Erasing 'vendor_a'...
OKAY [  0.139s]
Sending 'vendor_a' (266668 KB)...
OKAY [  7.407s]
Writing 'vendor_a'...
OKAY [  1.844s]
Setting current slot to 'a'...
OKAY [  0.066s]
Erasing 'userdata'...
OKAY [  2.096s]
Sending 'userdata' (4316 KB)...
OKAY [  0.198s]
Writing 'userdata'...
OKAY [  0.101s]
Rebooting...

Finished. Total time: 47.532s

我的pixel从Android 10成功烧录到了编译的Android 9.

注意：不要烧录https://developers.google.com/android/images的镜像，烧录后会导致OEM锁重新锁上，如果是V版的话，就比较麻烦了，需要去某宝找专业人士解锁。

下载、编译和烧录android11

下载android11的方法跟上面一样，我手头上的设备是pixel 3 XL，因此下载了android-11.0.0_r17。

编译android11的代码时，刚开始会报下面的错误：

variant "android_common": glob: fcntl: too many open files

参考https://www.jianshu.com/p/d6f7d1557f20和https://superuser.com/questions/433746/is-there-a-fix-for-the-too-many-open-files-in-system-error-on-os-x-10-7-1，设置下面的指令后，编译通过。

sudo launchctl limit maxfiles 64000 524288

查看maxfiles：

launchctl limit maxfiles