Ubuntu12.04编译OpenJDK 8
硬件配置：
CPU：Intel Pentium Dual T2330
Mem: 2G
Fre: 1.6G
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编译之前需要安装的编译依赖包参考：http://happyenjoylife.iteye.com/blog/858147
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0- 安装Mercucrial版本管理器
1- 下载源码
hg clone http://hg.openjdk.java.net/jdk8/jdk8 openjdk8cd openjdk8 && sh ./get_source.sh
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2- 下载jdk7
? ? 本地机器需要一个jdk7u7或者更高版本来编译Openjdk
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3- ?设置环境变量
export LANG=Cexport PATH=/opt/j2sdk-image/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/lib/jvm/java-6-openjdk/bin# Searching an existing JDKfor d in /opt/j2sdk-image/ /usr/lib/jvm/java-6-openjdk ; do if [ -d $d ]; then export ALT_BOOTDIR=$d break fidoneunset CLASSPATHunset JAVA_HOME#The default hotspot-build is all_product. Setting DEBUG_NAME would change the target.unset DBUG_NAMEexport DEBUG_NAME=debug # By setting the environment variables below, components can be built separately.export BUILD_HOTSPOT=trueexport BUILD_LANGTOOLS=falseexport BUILD_JDK=falseexport BUILD_CORBA=falseexport BUILD_JAXP=falseexport BUILD_JAXWS=falseexport BUILD_DEPLOY=false
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4- 编译
$ bash ./configure$ make all
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5- ?编译完成后，jdk位于/openjdk8/build/linux-x86-normal-server-release/images目录下
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