编译openjdk

http://blog.csdn.net/rongyongfeikai2/article/details/51137533 CentOS7手动编译OpenJDK

https://www.cnblogs.com/mr-long/p/5841604.html

https://www.cnblogs.com/ACFLOOD/p/5528035.html openjdk安装

http://blog.csdn.net/hl_java/article/details/76691321 老司机手把手教你自己编译jdk

http://blog.51cto.com/13266852/1962186 问题答案

http://blog.csdn.net/u010349169/article/category/2620885 Java虚拟机原理图解

环境：

操作系统：CentOS Linux release 7.4.1708 (Core)

计划编译的jdk: openjdk7 jdk7u

Bootstrap JDK: java version “1.7.0_80”

编译需要的软件：

yum install -y mercurial
yum install -y libX11* libX*
yum install -y libXi-devel libXtst-devel libXt-devel freetype*
yum install -y alsa-lib-devel cups-devel
yum install -y gcc gcc-c++

yum install libstdc++-static 或者 yum install glibc-static libstdc++-static

安装ant 1.7.1以上

安装jdk1.7.0_80

获取编译的源(openjdk7)

hg clone http://hg.openjdk.java.net/jdk7u/jdk7u
cd jdk7u
chmod 755 get_source.sh
./get_source.sh

**配置环境变量
**

vi ~/.bashrc

export LANG=C
export ALT_BOOTDIR=/usr/java/jdk1.7.0_80/
export ALLOW_DOWNLOADS=true

export HOTSPOT_BUILD_JOBS=4
export ALT_PATALLER_COMPILE_JOBS=4

export SKIP_COMPARE_IMAGES=true
export USE_PRECOMPILED_HEADER=true
export BUILD_LANGTOOLS=true
export BUILD_HOTSPOT=true
export BUILD_JDK=true

export BUILD_JAXP=true
export BUILD_JAXWS=true
export BUILD_CORBA=true

#export SKIP_DEBUG_BUILD=false
#export SKIP_FASTDEBUG_BUILD=true

BUILD_DEPLOY=false
BUILD_INSTALL=false

export ALT_OUTPUTDIR=/root/temp/jdk7u

#export CORBA_DIST=$ALT_OUTPUTDIR/corba/dist
#export JAXP_DIST=$ALT_OUTPUTDIR/jaxp/dist
#export JAXWS_DIST=$ALT_OUTPUTDIR/jaxws/dist

export ANT_HOME=/root/apache-ant-1.8.0
export ALT_FREETYPE_HEADERS_PATH=/usr/include/freetype2
export ALT_FREETYPE_LIB_PATH=/usr/lib64

unset JAVA_HOME
unset CLASSPATH
unset JAVA_OPTS

保存并source ~/.bashrc

编译前检查：

make sanity

编译：

make

测试编译的JDK:

进入编译的目录(export ALT_OUTPUTDIR=/root/temp/jdk7u)的bin目录，./java -version

显示下面内容说明编译成功：

openjdk version “1.7.0-internal”
OpenJDK Runtime Environment (build 1.7.0-internal-root_2017_08_04_17_21-b00)
OpenJDK 64-Bit Server VM (build 24.80-b07, mixed mode)

在eclipse上调试HotSpot虚拟机源码:

https://blog.csdn.net/tjiyu/article/details/53725247

https://www.cnblogs.com/endv/p/6427169.html vncserver