OpenJ9 Java 8 ARM Build Attempt

[dsouzai]

I spent some time trying to hack a Java 8 ARM build; given that @JamesKingdon got a Java 9 build going (#53 (comment)) I figured it was worth seeing if I could port his efforts to Java 8. If the title of this PR hasn't already given it away, I did not succeed. However, I'm opening this issue to document what I did so that anyone else who wants to attempt this can see what's already been tried.

cd <path to working dir>

wget https://github.com/AdoptOpenJDK/openjdk8-openj9-nightly/releases/download/jdk8u152-b16-20172811/OpenJDK8-OPENJ9_x64_Linux_20172811.tar.gz
tar -xf OpenJDK8-OPENJ9_x64_Linux_20172811.tar.gz

git clone https://github.com/dsouzai/openj9-openjdk-jdk8.git
cd openj9-openjdk-jdk8
git checkout armbuild

bash get_source.sh -openj9-repo=https://github.com/JamesKingdon/openj9.git -openj9-branch=arm-buildspec -omr-repo=https://github.com/JamesKingdon/openj9-omr.git -omr-branch=arm-build

cd openj9/buildenv/docker/jdk9/armhf_CC
docker build -t java8_openj9arm .

docker run -v <path to working dir>/openj9-openjdk-jdk8:/root/openj9-openjdk-jdk8:Z -v <path to working dir>/<openj9-openjdk-dirname>:/root/buildjdk:Z -it java8_openj9arm

cd openj9-openjdk-jdk8/common/autoconf
bash autogen.sh
cd /root/openj9-openjdk-jdk8

export LIBFFI_CFLAGS="-I${OPENJ9_CC_DIR}/arm-linux-gnueabihf/include"
export LIBFFI_LIBS="-L${OPENJ9_CC_DIR}/arm-linux-gnueabihf/libc/usr/lib/ -lffi"
export TOOLSDIR=${OPENJ9_CC_DIR}/bin
export PATH=$TOOLSDIR:$PATH

bash ./configure --openjdk-target=arm-linux-gnueabihf --with-x=${OPENJ9_CC_DIR}/arm-linux-gnueabihf  --with-sys-root=${OPENJ9_CC_DIR}/arm-linux-gnueabihf/libc --with-freemarker-jar=/root/freemarker.jar --with-tools-dir=${TOOLSDIR} OBJCOPY=arm-linux-gnueabihf-objcopy STRIP=arm-linux-gnueabihf-strip CPP=arm-linux-gnueabihf-cpp CXX=arm-linux-gnueabihf-g++ CC=arm-linux-gnueabihf-gcc LD=arm-linux-gnueabihf-gcc CPP_FLAGS=-lstdc++ CXX_FLAGS=-lstdc++ AR=arm-linux-gnueabihf-ar --disable-freetype-bundling --with-freetype-include=${OPENJ9_CC_DIR}/arm-linux-gnueabihf/libc/usr/include/freetype2 --with-freetype-lib=${OPENJ9_CC_DIR}/arm-linux-gnueabihf/libc/usr/lib --with-freetype=${OPENJ9_CC_DIR}/arm-linux-gnueabihf/libc/usr/ BUILD_CC=/usr/bin/gcc BUILD_CXX=/usr/bin/g++ BUILD_LD=/usr/bin/gcc 

make CONF=linux-arm-normal-server-release all

This will result the entire build process completing. However there were a some errors I saw when generating the Nimbus files. Additionally, the j2sdk-image doesn't get composed properly (none of the openj9 files get copied over), though perhaps that's because of something wrong in dsouzai/openj9-openjdk-jdk8@e4516f9 or one of the other commits (https://github.com/dsouzai/openj9-openjdk-jdk8/commits/armbuild).