Android build error on Ubuntu 16.04 LTS

http://oopsmonk.github.io/blog/2016/06/07/android-build-error-on-ubuntu-16-04-lts

After update system from Ubuntu 14.04 to 16.04, I got some problems, when I was building Android source code.

openjdk-7-jdk is gone

Add PPA for OpenJDK7

sudo add-apt-repository ppa:openjdk-r/ppa  sudo apt remove openjdk-* icedtea-* icedtea6-*  sudo apt update && sudo apt install openjdk-7-jdk git ccache automake lzop bison gperf build-essential zip curl zlib1g-dev zlib1g-dev:i386 g++-multilib python-networkx libxml2-utils bzip2 libbz2-dev libbz2-1.0 libghc-bzlib-dev squashfs-tools pngcrush schedtool dpkg-dev liblz4-tool make optipng maven  

If you have other java version in system, make sure your java version is correct.

sudo update-alternatives --config java sudo update-alternatives --config javac sudo update-alternatives --config javadoc sudo update-alternatives --config javap sudo update-alternatives --config javaws sudo update-alternatives --config jar 

Reference: [GUIDE] How to Setup Ubuntu 16.04 LTS Xenial Xerus for Compiling Android ROMs

unsupported reloc 43

prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.6//x86_64-linux/include/c++/4.6/bits/basic_string.h:270: error: unsupported reloc 43prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.6//x86_64-linux/include/c++/4.6/bits/basic_string.h:270: error: unsupported reloc 43prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.6//x86_64-linux/include/c++/4.6/bits/basic_string.h:235: error: unsupported reloc 43prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.6//x86_64-linux/include/c++/4.6/bits/basic_string.h:235: error: unsupported reloc 43libnativehelper/JNIHelp.cpp:310: error: unsupported reloc 43libnativehelper/JNIHelp.cpp:311: error: unsupported reloc 43libnativehelper/JNIHelp.cpp:332: error: unsupported reloc 43libnativehelper/JNIHelp.cpp:322: error: unsupported reloc 43libnativehelper/JNIHelp.cpp:338: error: unsupported reloc 43...libnativehelper/JniInvocation.cpp:165: error: unsupported reloc 43libnativehelper/JniInvocation.cpp:165: error: unsupported reloc 43libnativehelper/JniInvocation.cpp:165: error: unsupported reloc 43clang: error: linker command failed with exit code 1 (use -v to see invocation)build/core/host_shared_library_internal.mk:44: recipe for target 'out/host/linux-x86/obj32/lib/libnativehelper.so' failedmake: *** [out/host/linux-x86/obj32/lib/libnativehelper.so] Error 1 

The older prebuilt toolchain have some problems with newer version of ‘as’ in the native environment.
This error will show up when your environment is Ubuntu 16.04 and AOSP before May 7, 2106.
To solve this problem:

• Modify build/core/clang/HOST_x86_common.mk

diff --git a/core/clang/HOST_x86_common.mk b/core/clang/HOST_x86_common.mkindex 0241cb6..77547b7 100644--- a/core/clang/HOST_x86_common.mk+++ b/core/clang/HOST_x86_common.mk@@ -8,6 +8,7 @@ ifeq ($(HOST_OS),linux) CLANG_CONFIG_x86_LINUX_HOST_EXTRA_ASFLAGS := \   --gcc-toolchain=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG) \   --sysroot=$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/sysroot \+  -B$($(clang_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG)/x86_64-linux/bin \   -no-integrated-as  CLANG_CONFIG_x86_LINUX_HOST_EXTRA_CFLAGS := \  

• Use AOSP after May 7, 2016

Reference: https://android-review.googlesource.com/#/c/223100/