[原创]编译android10 for pixel

编译的操作系统

ubuntu 16.04

源码分支获取

找好源码分支

这里我们找pixel因为手里只有pixel

https://source.android.com/setup/start/build-numbers#source-code-tags-and-builds

选区_001.png

下载android源码

repo

sudo apt-get install git-core
sudo apt-get install git-core curl
mkdir ~/bin/
cd ~/bin

curl https://mirrors.tuna.tsinghua.edu.cn/git/git-repo > ~/bin/repo
chmod a+x ~/bin/repo
gedit ~/.bashrc

在~/.bashrc里添加

alias ob='gedit ~/.bashrc'
alias sr='source ~/.bashrc'

#国内镜像
export REPO_URL='https://aosp.tuna.tsinghua.edu.cn/git-repo'

下载

cd ~/work/sources/android-10.0.0_r17
repo init -u https://aosp.tuna.tsinghua.edu.cn/platform/manifest -b android-10.0.0_r17
repo sync -j16

驱动

https://developers.google.com/android/drivers#sailfishqp1a.190711.020

google_devices-sailfish-qp1a.191005.007.a3-a1615a0f.tgz

qcom-sailfish-qp1a.191005.007.a3-191228fe.tgz

解压驱动到vendor文件夹，然后把它放到源码根目录

编译环境

sudo apt-get install git-core gnupg flex bison gperf build-essential \
  zip curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386 \
  lib32ncurses5-dev x11proto-core-dev libx11-dev lib32z-dev ccache \
  libgl1-mesa-dev libxml2-utils xsltproc unzip
  
  sudo apt-get install openjdk-8-jdk

关odex

更改 build/make/core/board_config.mk

#ifeq ($(HOST_OS),linux)
#  WITH_DEXPREOPT := true
#endif
WITH_DEXPREOPT=false

修改build/core/dex_preopt_config.mk

DEX_PREOPT_DEFAULT ?= true改成
DEX_PREOPT_DEFAULT?= false


ifneq (true,$(WITH_DEXPREOPT))
  ifneq (true,$(WITH_DEXPREOPT_BOOT_IMG_AND_SYSTEM_SERVER_ONLY))
    #$(call pretty-error, DEXPREOPT must be enabled for user and userdebug builds)
    $(warning odex关闭)
  endif
endif

去掉DEX优化编译的方法：

1、mm WITH_DEXPREOPT=false

2、Android.mk中增加：LOCAL_DEX_PREOPT := false

 # Non eng linux builds must have preopt enabled so that system server doesn't run as interpreter
  # only. b/74209329
  ifeq (,$(filter eng, $(TARGET_BUILD_VARIANT)))
    ifneq (true,$(WITH_DEXPREOPT))
      ifneq (true,$(WITH_DEXPREOPT_BOOT_IMG_AND_SYSTEM_SERVER_ONLY))
        #$(call pretty-error, DEXPREOPT must be enabled for user and userdebug builds)
        $(warning WITH_DEXPREOPT=false)
      endif
    endif
  endif

因为默认eng编译，WITH_DEXPREOPT必须打开为true,否则提示编译报错。

修改android.bp实现模块编译关odex

系统里的打包配置是android.bp，不知道android.mk是怎么转的bp可以看 build/soong/androidmk/cmd/androidmk/android.go

"LOCAL_DEX_PREOPT":                  "dex_preopt.enabled",
"LOCAL_MODULE":                  "name",

所以可以去/framework里找android.bp

framework的bp文件在framework/base/Android.bp，加上dex_preopt项

java_library {
    name: "framework",
    defaults: ["framework-defaults"],
    javac_shard_size: 150,
    dex_preopt: {
        enabled:false,
    },
}

services在framework/base/services/Android.bp

java_library {
    name: "services",
    installable: true,

    dex_preopt: {
        enabled:false,
        //app_image: true,
        //profile: "art-profile",
    },

准备

source ./build/envsetup.sh 
lunch aosp_sailfish-userdebug

编译

make -j16

ninja快速编译framewrk

./prebuilts/build-tools/linux-x86/bin/ninja -f out/combined-aosp_sailfish.ninja services
./prebuilts/build-tools/linux-x86/bin/ninja -f out/combined-aosp_sailfish.ninja framework
adb push out/target/product/sailfish/system/framework/oat/arm64/services.odex system/framework/oat/arm64
adb push out/target/product/sailfish/system/framework/oat/arm64/services.vdex system/framework/oat/arm64
adb push out/target/product/sailfish/system/framework/services.jar system/framework
adb push out/target/product/sailfish/system/framework/services.jar.prof system/framework

刷机

fastboot flashall -w