jvm-0x01-在Linux上编译openjdk22

之前在mac上编译的openjdk源码jvm-0x00-编译openjdk，两个原因促使我要在Linux上操作一下

• mac机子老了，性能不行了，编译一次发烫厉害
• 一鼓作气，借着这个机会把以前没学的源码重拾

1 安装jdk21作为boot

官网下个java21用作openjdk22的boot

mkdir -p MyApp/jdk/21
mv ~/MyDownload/jdk-21_linux-x64_bin.deb ~/MyApp/jdk/21
cd MyApp/jdk/21
sudo apt install ./jdk-21_linux-x64_bin.deb
dpkg -l|grep jdk
java -version
dpkg -L jdk-21

在zsh中修改一下对应环境变量

2 下载源码

git clone git@github.com:Bannirui/jdk.git
cd jdk
git remote add upstream git@github.com:openjdk/jdk.git
git remote set-url --push upstream no_push
git remote -v
git checkout jdk_22_study

3 生成make脚本

先安装依赖

sudo apt install autoconf
sudp apt install zip
sudo apt-get install libasound2-dev
sudo apt-get install libcups2-dev
sudo apt-get install libfontconfig1-dev
sudo apt-get install libx11-dev libxext-dev libxrender-dev libxrandr-dev libxtst-dev libxt-dev

bash ./configure \
--with-debug-level=slowdebug \
--with-jvm-variants=server \
--with-freetype=bundled \
--with-boot-jdk=/usr/lib/jvm/jdk-21.0.7-oracle-x64 \
--with-target-bits=64 \
--disable-warnings-as-errors \
--with-extra-cxxflags="-std=c++14"

看下build目录下生成的conf名称

linux-x86_64-server-slowdebug

4 编译

make CONF=linux-x86_64-server-slowdebug compile-commands
sudo make CONF=linux-x86_64-server-slowdebug
./build/linux-x86_64-server-slowdebug/jdk/bin/java --version