Ubuntu16.04编译Android6.0通过，步骤

leung先森

按照wiki ubuntu14.04的环境安装后再进行后面操作。
16.04默认的源找不到openjdk-7 ，给添加一个源

sudo add-apt-repository ppa:openjdk-r/ppa
sudo apt-get update
sudo apt-get install openjdk-7-jdk

安装完后注意当前jdk版本
sudo update-alternatives --config java
sudo update-alternatives --config javac

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上层编译
出现错误：
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/obj32/lib/libart.so' failed
make: *** [out/host/linux-x86/obj32/lib/libart.so] Error 1


原因：ubuntu16.04 clang编译器导致的问

1.关闭clang，修改art/build/Android.common_build.mk ,中将host 默认编辑器使用clang关掉，找到WITHOUT_HOST_CLANG
修改如下：
# Host.
ART_HOST_CLANG := false
ifneq ($(WITHOUT_HOST_CLANG),true)
# By default, host builds use clang for better warnings.
ART_HOST_CLANG := false
endif

2. 安装环境
sudo apt install git-core gnupg flex bison gperf build-essentialzip \
curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386lib32ncurses5-dev \
x11proto-core-dev libx11-dev lib32z-dev ccache libgl1-mesa-dev \
libxml2-utils xsltproc unzip m4  && sudo apt-get update

无需clean继续编译即可。

-------------------
报错：
prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.15-4.8//x86_64-linux/bin/ld: error: /home/hains/android/system/out/host/linux-x86/obj32/SHARED_LIBRARIES/libart_intermediates/arch/x86/quick_entrypoints_x86.o: unsupported reloc 43 against global symbol art::Runtime::instance_
---------------------  
原因：编译环境ld出错，使用系统命令代替
cp /usr/bin/ld.gold prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.6/x86_64-linux/bin/ld