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# Copyright (C) [2020-2021] Futurewei Technologies, Inc. All rights reserved.
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# OpenArkCompiler is licensed underthe Mulan Permissive Software License v2.
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需要一台Linux x86_64服务器，至少16GB或以上内存，安装Ubuntu 16.04或18.04系统. 若您的服务器只有16GB内存，需要创建8GB或以上的swap空间。
编译和链接 OpenJDK 核心库时，会占用很多内存。对于少于16GB内存的服务器，可以考虑 在其它内存较多的服务器上先构建好libcore.so, 将maple_engine/maple_build/out/这个 目录打包传到您的本地机器，展开后放到本地机器 同名目录下，再拷贝其中的文件 libcore.so 到maple_engine/maple_runtime/lib/x86_64/libcore.so，就可以本地编译和运行应用程序了。
登录服务器后，执行如下命令安装所需的软件包：
sudo apt install -y build-essential clang cmake libffi-dev libelf-dev libunwind-dev \
libssl-dev openjdk-8-jdk-headless unzip python-minimal python3 gdb bc highlight
下载代码并设置Maple 构建环境：
git clone https://gitee.com/openarkcompiler-incubator/maple_engine.git
cd maple_engine
source ./envsetup.sh
若要执行后续命令，需先执行source ./envsetup.sh.
./maple_build/tools/build-maple.sh
按照文档./maple_build/doc/build_OpenJDK8.md 中介绍的方法构建定制的OpenJDK-8. 将文档中提到的必需的.jar 文件拷贝到./maple_build/jar/ 目录中，再执行如下命令：
./maple_build/tools/build-libcore.sh
构建Java 核心库完成后，会将编译应用代码所需要的文件拷贝到maple_runtime/lib/x86_64/目录下。
以HelloWorld为例，编译和执行一个应用程序：
cd ./maple_build/examples/HelloWorld
"$MAPLE_BUILD_TOOLS"/java2asm.sh HelloWorld.java
"$MAPLE_BUILD_TOOLS"/asm2so.sh HelloWorld.s
"$MAPLE_BUILD_TOOLS"/run-app.sh -classpath ./HelloWorld.so HelloWorld
"$MAPLE_BUILD_TOOLS"/run-app.sh -gdb -classpath ./HelloWorld.so HelloWorld
This requires an x86_64 server with more than 16GB of RAM and Ubuntu 16.04/18.04 installed. If your server has 16GB RAM, please setup 8GB or more swap space.
Execute the following command to install the packages used by the Maple build.
sudo apt install -y build-essential clang cmake libffi-dev libelf-dev libunwind-dev \
libssl-dev openjdk-8-jdk-headless unzip python-minimal python3 gdb bc highlight
cd maple_engine
source ./envsetup.sh
./maple_build/tools/build-maple.sh
Following the doc at ./maple_build/doc/build_OpenJDK8.md to build the customized OpenJDK8. Make sure the needed .jar files are copied into ./maple_build/jar/ directory.
./maple_build/tools/build-libcore.sh
cd ./maple_build/examples/HelloWorld
"$MAPLE_BUILD_TOOLS"/java2asm.sh HelloWorld.java
"$MAPLE_BUILD_TOOLS"/asm2so.sh HelloWorld.s
"$MAPLE_BUILD_TOOLS"/run-app.sh -classpath ./HelloWorld.so HelloWorld
cd ./maple_build/examples/HelloWorld-C
"$MAPLE_BUILD_TOOLS"/run-c-app.sh HelloWorld-C.c
"$MAPLE_BUILD_TOOLS"/run-app.sh -gdb -classpath ./HelloWorld.so HelloWorld
需要一台Linux x86_64服务器，至少6GB或以上内存，安装Ubuntu 16.04或18.04系统.
登录服务器后，执行如下命令安装所需的软件包：
sudo apt install -y build-essential clang cmake libffi-dev libunwind-dev openjdk-8-jdk-headless \
libssl-dev:i386 libelf-dev:i386 g++-5 gcc-5 g++-multilib gcc-multilib libc6-dev-i386 \
unzip python-minimal python3 gdb bc highlight libicu-dev
下载代码并设置MapleJS 构建环境：
git clone https://gitee.com/openarkcompiler-incubator/maple_engine.git
若要执行后续命令，需先执行source maple_engine/envsetup.sh.
以下脚本下载与构建JavaScript引擎，构建与安装maple编译器，构建MapleJS引擎:
maple_engine/maple_build/tools/build-maple-js.sh
以add.js为例，编译和执行一个应用程序：
cd maple_engine/maple_build/examples/JavaScript/add
$MAPLE_ROOT/maple_build/tools/run-js-app.sh add
你将看到：
add: pass
This requires an x86_64 server with more than 6GB of RAM and Ubuntu 16.04/18.04 installed.
Execute the following command to install the packages used by the MapleJS build.
sudo apt install -y build-essential clang cmake libffi-dev libunwind-dev openjdk-8-jdk-headless \
libssl-dev:i386 libelf-dev:i386 g++-5 gcc-5 g++-multilib gcc-multilib libc6-dev-i386 \
unzip python-minimal python3 gdb bc highlight libicu-dev
Download MapleJS code:
git clone https://gitee.com/openarkcompiler-incubator/maple_engine.git
Set up build enviroment: source maple_engine/envsetup.sh.
Run following script to: Download and build jscre Build Maple compiler release (mplbe, mplcg, js2mpl) for Maple Engine Build Maple Engine for JS
./maple_build/tools/build-maple-js.sh
Build and run examples in JavaScript:
cd maple_engine/maple_build/examples/JavaScript/add
$MAPLE_ROOT/maple_build/tools/run-js-app.sh add
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