Hardware: MTK6737
Android: 6.0(API 23)
Kernel: Linux 3.4.67

安裝編譯環境並編譯

安裝編譯環境依賴包

2>ubuntu < 12.04

sudo apt-get install git-core gnupg flex bison ccache gperf libsdl1.2-dev libesd0-dev libwxgtk2.6-dev build-essential zip curl libncurses5-dev zlib1g-dev valgrind libc6-dev lib32ncurses5-dev
 
 x11proto-core-dev libx11-dev lib32readline-gplv2-dev lib32z1-dev libgl1-mesa-dev gcc-4.4 g++-4.4 g++-4.4-multilib g++-multilib mingw32 tofrodos python-markdown libxml2-utils xsltproc wine

3>ubuntu = 14.04

sudo apt-get install git-core gnupg flex bison ccache gperf libsdl1.2-dev libesd0-dev libwxgtk2.8
 
-dev build-essential zip curl libncurses5-dev zlib1g-dev valgrind libc6-dev lib32ncurses5-dev x11proto-core-dev libx11-dev lib32readline-gplv2-dev lib32z1-dev libgl1-mesa-dev g++-multilib g++-4.8-multilib mingw32 tofrodos python-markdown libxml2-utils xsltproc libc6-dev-i386 lib32z1 lib32ncurses5 lib32bz2-
 
1.0 lib32readline-gplv2-dev wine

安裝無問題

ubuntu = 16.04

sudo apt-get install git-core gnupg flex bison ccache gperf libsdl1.2-dev libesd0-dev libwxgtk2.8-dev build-essential zip curl libncurses5-dev zlib1g-dev valgrind libc6-dev lib32ncurses5-dev x11proto-core-dev libx11-dev lib32readline-gplv2-dev lib32z1-dev libgl1-mesa-dev g++-multilib g++-4.8-multilib mingw32 tofrodos python-markdown libxml2-utils xsltproc libc6-dev-i386 lib32z1 lib32ncurses5 lib32bz2-1.0 lib32readline-gplv2-dev wine

報錯有如下無法定位：
libwxgtk2.8-dev mingw32
lib32bz2-1.0 lib32readline-gplv2-dev

在 Ubuntu16.04 中
libwxgtk2.8-dev 已經升級為 libwxgtk3.0-dev;
lib32bz2-1.0 已經升級為 libbz2-1.0:i386;
lib32readline-gplv2-dev 已經升級為 lib32readline6-dev;
所以：

sudo apt install libwxgtk3.0-dev  lib32readline6-dev libbz2-1.0:i386

mingw32 需要在 sudo vi /etc/apt/sources.list新增源：

deb http://us.archive.ubuntu.com/ubuntu trusty main universe

之後如下即可

sudo apt update
sudo apt install mingw32 

bootloader 和 kernel 編譯

全編譯：

cd runyee/scripts/
./auto.sh IoT_bd6737m_35g_b_m0_ry_smt_hd720_pcb_v1 v00 eng

瞭解到現在我們的模組 lunch 的是 bd6737m_35g_b_m0 這個 project

模組編譯：
首先通過 get_build_var 獲得 project name：

get_build_var TARGET_DEVICE
op_project_name

get_build_var TARGET_BUILD_VARIANT
eng

分模組編譯的時候可以傳入
preloader：
1. 單獨編譯

make -j4 pl 2>&1 | tee pl_build.log

會生成 bootable/bootloader/preloader/bin

1. build 指令碼編譯：

cd bootable/bootloader/preloader
TARGET_PRODUCT=$op_project_name ./build.sh 2>&1 | tee preloader_build.log

lk:

make -j4 lk 2>&1 | tee lk_build.log

會生成 bootable/bootloader/lk/build-xx

Kernel:
1. 單獨編譯

cd kernel-3.18
mkdir out
make -j4 O=out 2>&1 | tee kernel_build.log

會生成 kernel-3.18/out/arch/arm64/boot/Image.gz-dtb

1. build 指令碼編譯

make -j8 n k && make -j8 r bootimage

clean:

# Clean ALL
make clean
# Clean PL
make clean-pl
# Clean lk
make clean-lk
# Clean kernel
make clean-kernel

Android 編譯

# 1. 環境變數
source build/envsetup.sh
# 2. 選擇工程
lunch full_bd6737m_35g_b_m0-eng
# 3. MTK 環境變數
source mbldev.sh
# 4. 編譯
make -j4 2 > &1 | tee mtk_build.log

打包

# pack boot image
make -j4 bootimage

# pack system image 根據依賴規則重新生成所有要打包的檔案
make -j4 systemimage

# pack system image 快速打包 system image
# （如果所修改模組與其他模組沒有依賴關係，直接 build 對應模組並用 snod 命令打包）
make -j4 snod 

# pack ota image
make -j4 otapackage

硬體引數

MTK6737

4 x 1.3GHz 28nm
LTE supported
GPU: MailT720

Check SDK Version

vi build/core/version_defaults.mk

  PLATFORM_VERSION := 6.0    
  PLATFORM_SDK_VERSION := 23   #Android6.0

vi kernel/Makefile
VERSION = 3
PATCHLEVEL = 18
SUBLEVEL = 19

編譯中碰到的問題

clang 問題

clang: error: linker command failed with exit code 1 (use -v to see invocation)
build/core/host_shared_library_internal.mk:51: recipe for target 'out/host/linux-x86/obj/lib/libart.so' f
ailed
make: *** [out/host/linux-x86/obj/lib/libart.so] Error 1

解決方法：
程式碼 art/build/Android.common_build.mk 中

   # By default, host builds use clang for better warnings.
--  ART_HOST_CLANG := true
++  ART_HOST_CLANG := false

STATIC_LIBRARIES SHARED_LIBRARIES 型別的問題

比如下面這些

make: *** No rule to make target 'out/target/product/bd6737m_35g_b_m0/obj/STATIC_LIBRARIES/libcam.halmemory_intermediates/export_includes', needed by 'out/target/product/bd6737m_35g_b_m0/obj/SHARED_LIBRARIES/libcam_platform_intermediates/import_includes'。 停止。
make: *** 正在等待未完成的任務....
target thumb C++: libcam.device3.base <= vendor/mediatek/proprietary/hardware/mtkcam/legacy/v3/device/Cam3DeviceFactory.cpp

make: *** No rule to make target 'out/target/product/bd6737m_35g_b_m0/obj/STATIC_LIBRARIES/libcam.halmemory_intermediates/export_includes', needed by 'out/target/product/bd6737m_35g_b_m0/obj/SHARED_LIBRARIES/libcam_platform_intermediates/import_includes'。 停止。
make: *** 正在等待未完成的任務....
target StaticLib: libcam.device3.base (out/target/product/bd6737m_35g_b_m0/obj/STATIC_LIBRARIES/libcam.device3.base_intermediates/libcam.device3.base.a)

可以參考 安裝編譯環境依賴包 進行安裝必要的包

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