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
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| 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
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在zsh中修改一下对应环境变量
2 下载源码
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| 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
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3 生成make脚本
先安装依赖
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| sudo apt install autoconf
sudo 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
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比如在用windows的wsl时，要防止自动推导当前系统以及交叉编译，明确告知就是Linux平台，build和host参数要指定
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| bash configure \
--build=x86_64-linux-gnu \
--host=x86_64-linux-gnu \
--target=x86_64-linux-gnu \
--with-debug-level=slowdebug \
--with-jvm-variants=server \
--with-freetype=bundled \
--with-boot-jdk=/home/dingrui/MyApp/jdk/jdk-21.0.10 \
--disable-warnings-as-errors
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看下build目录下生成的conf名称linux-x86_64-server-slowdebug
4 编译
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| make CONF=linux-x86_64-server-slowdebug compile-commands
make CONF=linux-x86_64-server-slowdebug
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5 运行java
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| ./build/linux-x86_64-server-slowdebug/jdk/bin/java --version
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