Centos7编译openjdk8源码

yum install java-1.8.0-openjdk

我的centos7默认已经有openjdk8了，这一步省略，如果没有需要安装

openjdk version “1.8.0_302”
OpenJDK Runtime Environment (build 1.8.0_302-b08)
OpenJDK 64-Bit Server VM (build 25.302-b08, mixed mode)

本步骤我是直接从网上下载的openjdk8，所以没有这一步

yum install hg
hg clone http://hg.openjdk.java.net/jdk8u/jdk8u openjdk8
cd openjdk8
sh get_source.sh  # 这个过程比较慢，不可急躁，下载过程很可能下载不全，多下几次即可

yum install alsa-lib-devel cups-devel libX* gcc gcc-c++ freetype-devel libstdc++-static ant make

chmod +x configure

./configure --with-target-bits=64 --with-debug-level=slowdebug --enable-debug-symbols ZIP_DEBUGINFO_FILES=0

--with-boot-jdk：指定引导JDK所在目录；

--with-target-bits：指定编译64位系统的JDK；

为可以进行源码调试，再指定下面三个参数：

--with-debug-level=slowdebug：指定可以生成最多的调试信息；

--enable-debug-symbols ZIP_DEBUGINFO_FILES=0：生成调试的符号信息，并且不压缩

进入openjdk8/build/linux-x86_64-normal-server-slowdebug目录
执行下面命令

make all ZIP_DEBUGINFO_FILES=0

 /develop/openjdk8/build/linux-x86_64-normal-server-slowdebug/jdk/bin/java -version

openjdk version “1.8.0-internal-debug”
OpenJDK Runtime Environment (build 1.8.0-internal-debug-root_2021_10_13_21_49-b00)
OpenJDK 64-Bit Server VM (build 25.40-b25-debug, mixed mode)

public class Test {
 public static void main(String[] args) {
  System.out.println(System.getProperty("user.home"));
  System.out.println(System.getProperty("java.version"));
  System.out.println(System.getProperty("os.name"));
  System.out.println(System.getProperty("java.vendor.url"));
 }
}

/develop/openjdk8/build/linux-x86_64-normal-server-slowdebug/jdk/bin/javac Test.java

/develop/openjdk8/build/linux-x86_64-normal-server-slowdebug/jdk/bin/java Test

/root
1.8.0-internal-debug
Linux
http://java.oracle.com/

https://www.cnblogs.com/alone-striver/p/8996394.html
https://blog.csdn.net/u014106644/article/details/89371665