参考文档就不写了，网上搜索一大堆；
在这里主要强调的是，虚拟机内核版本很重要，不管外面gcc或者make版本如何，都要配合内核版本才能正确运行。
ubuntu20.04内核版本：
(base) caoyong@caoyong1:~$ cat /proc/version Linux version 5.11.0-38-generic (buildd@lgw01-amd64-041) (gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #42~20.04.1-Ubuntu SMP Tue Sep 28 20:41:07 UTC 2021
linux内核5+对于openjdk编译来说，有不兼容的情况，意味着付出很多努力，也不一定能够成功（事实上，我失败了）
对于centos7.9来说
#3.10版本编译jdk兼容性就很好 (base) [cyxinda@centos7 code]$ cat /proc/version Linux version 3.10.0-1160.el7.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-44) (GCC) ) #1 SMP Mon Oct 19 16:18:59 UTC 2020
可以完美的编译jdk
部署mercurial参考：https://www.cnblogs.com/sea-stream/p/14041361.html
下载地址：wget https://www.mercurial-scm.org/release/mercurial-5.9.2.tar.gz --no-check-certificate
执行如下命令：
(python3.8.11) [cyxinda@centos7 source]$ tar -zxvf mercurial-5.9.2.tar.gz (python3.8.11) [cyxinda@centos7 source]$ sudo mv mercurial-5.9.2 /var/lib/ [sudo] password for cyxinda: (base) [cyxinda@centos7 source]$ vim ~/.bashrc # 在~/.bashrc结尾处添加内容：export PATH=$PATH:$HOME/bin:/var/lib/mercurial-5.9.2 (base) [cyxinda@centos7 source]$ source ~/.bashrc (base) [cyxinda@centos7 source]$ hg --version Mercurial Distributed SCM (version 5.9.2) (see https://mercurial-scm.org for more information) Copyright (C) 2005-2021 Olivia Mackall and others This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.下载OpenJdk
执行如下命令：
(base) [cyxinda@centos7 code]$ hg clone http://hg.openjdk.java.net/jdk8/jdk8 openjdk8 #等待N长时间继续尝试，知道成功为止 (base) [cyxinda@centos7 code]$ cd openjdk8 (base) [cyxinda@centos7 code]$ bash ./get_source.sh #等待NN长时间，不断重试，知道成功为止下载引导JDK
引导jdk必须比要编译的jdk版本低，不能用jdk8
下载jdk7
(base) [cyxinda@centos7 source]$ wget https://download.java.net/openjdk/jdk7u75/ri/jdk_ri-7u75-b13-linux-x64-18_dec_2014.tar.gz (base) [cyxinda@centos7 source]$ tar -zxvf jdk_ri-7u75-b13-linux-x64-18_dec_2014.tar.gz (base) [cyxinda@centos7 source]$ sudo mv java-se-7u75-ri /var/lib/ [sudo] password for cyxinda:编译openJDK
- 构建JDK
(base) [cyxinda@centos7 openjdk]$ pwd /code/source/openjdk (base) [cyxinda@centos7 openjdk]$ bash ./configure > --with-target-bits=64 > --with-boot-jdk=/var/lib//java-se-7u75-ri/ > --with-debug-level=slowdebug > --enable-debug-symbols ZIP_DEBUGINFO_FILES=0 config.status: creating /code/source/openjdk/build/linux-x86_64-normal-server-slowdebug/Makefile config.status: creating /code/source/openjdk/build/linux-x86_64-normal-server-slowdebug/config.h ==================================================== A new configuration has been successfully created in /code/source/openjdk/build/linux-x86_64-normal-server-slowdebug using configure arguments '--with-target-bits=64 --with-boot-jdk=/var/lib/java-se-7u75-ri/ --with-debug-level=slowdebug --enable-debug-symbols ZIP_DEBUGINFO_FILES=0'. Configuration summary: * Debug level: slowdebug * JDK variant: normal * JVM variants: server * OpenJDK target: OS: linux, CPU architecture: x86, address length: 64 Tools summary: * Boot JDK: openjdk version "1.7.0_75" OpenJDK Runtime Environment (build 1.7.0_75-b13) OpenJDK 64-Bit Server VM (build 24.75-b04, mixed mode) (at /var/lib/java-se-7u75-ri) * C Compiler: gcc (GCC) 4.8.5 20150623 (Red Hat-44) version 4.8.5-44) (at /usr/bin/gcc) * C++ Compiler: g++ (GCC) 4.8.5 20150623 (Red Hat-44) version 4.8.5-44) (at /usr/bin/g++) Build performance summary: * Cores to use: 4 * Memory limit: 5786 MB * ccache status: not installed (consider installing) Build performance tip: ccache gives a tremendous speedup for C++ recompilations. You do not have ccache installed. Try installing it. You might be able to fix this by running 'sudo yum install ccache'.
如上表明构建成功。
-
异常1：
configure: error: Could not find all X11 headers (shape.h Xrender.h XTest.h Intrinsic.h). You might be able to fix this by running 'sudo yum install libXtst-devel libXt-devel libXrender-devel'.
运行sudo yum install libXtst-devel libXt-devel libXrender-devel即可解决 -
异常2：
configure: error: Could not find cups! You might be able to fix this by running 'sudo yum install cups-devel'. configure exiting with result code 1
运行sudo yum install cups-devel即可解决 -
异常3：
configure: error: Could not find freetype! You might be able to fix this by running ‘sudo yum install freetype-devel’.
configure exiting with result code 1configure: error: Could not find alsa! You might be able to fix this by running ‘sudo yum install alsa-lib-devel’.
configure exiting with result code 1
- 编译openjdk
(base) [cyxinda@centos7 openjdk]$ make all ZIP_DEBUGINFO_FILES=0 #要等待N长时间，期间要安装N多依赖才能编译成功 # com.sun.nio.sctp ## Finished docs (build time 00:02:27) ----- Build times ------- Start 2021-10-16 04:30:21 End 2021-10-16 04:41:47 00:00:29 corba 00:00:18 demos 00:02:27 docs 00:02:51 hotspot 00:00:30 images 00:00:19 jaxp 00:00:29 jaxws 00:03:10 jdk 00:00:37 langtools 00:00:16 nashorn 00:11:26 TOTAL ------------------------- Finished building OpenJDK for target 'all' (base) [cyxinda@centos7 openjdk]$ ./build/linux-x86_64-normal-server-slowdebug/jdk/bin/java version Error: Could not find or load main class version (base) [cyxinda@centos7 openjdk]$ ./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-cyxinda_2021_10_16_04_28-b00) OpenJDK 64-Bit Server VM (build 25.0-b70-debug, mixed mode)
上述表明openjdk编译成功
运行测试：
(base) [cyxinda@centos7 openjdk]$ vim Test.java
(base) [cyxinda@centos7 openjdk]$ cat Test.java
public class Test{
public static void main(String[] args){
System.out.println("Hello World");
}
}
(base) [cyxinda@centos7 openjdk]$ ./build/linux-x86_64-normal-server-slowdebug/jdk/bin/javac Test.java
(base) [cyxinda@centos7 openjdk]$ ./build/linux-x86_64-normal-server-slowdebug/jdk/bin/java Test
Hello World
