```

下面这个脚本可以下载方舟引擎及编译器,下载和更新`Object.java`文件,编译它并更新到核心库的`.jar`文件,创建核心库`libcore.so`, 编译和运行`HelloWorld`程序。

```bash

#!/bin/bash

mkdir -p ~/gitee

cd ~/gitee || exit $LINENO

[ -d maple_engine ] || git clone https://gitee.com/openarkcompiler-incubator/maple_engine.git || exit $LINENO

cd maple_engine || exit $LINENO

source ./envsetup.sh

./maple_build/tools/build-maple.sh >& ../build-maple.log || exit $LINENO

mkdir -p maple_build/jar/java/lang || exit $LINENO

cd maple_build/jar || exit $LINENO

cp ${JAVA_HOME}/jre/lib/{rt,jce,jsse,charsets}.jar . || exit $LINENO

r=$(apt list openjdk-8-jre 2>&1 | grep amd64 | sed 's/.*\(8u[0-9]*-b[0-9]*\).*/\1/')

obj=src/share/classes/java/lang/Object.java

wget -O java/lang/Object.java http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/raw-file/jdk$r/$obj || exit $LINENO

sed -i '/public class Object {/a\long reserved_1; int reserved_2;' java/lang/Object.java

javac -target 1.8 -g java/lang/Object.java || exit $LINENO

jar uf rt.jar java/lang/Object.class || exit $LINENO

cd -

# Build libcore.so

kb=$(grep -e MemAvailable -e SwapFree /proc/meminfo | sed 's/[^0-9]//g' | paste -s -d+ - | bc)

[ $kb -gt 24576000 ] || { echo Please add more swap space to build libcore.so; exit $LINENO; }

./maple_build/tools/build-libcore.sh || exit $LINENO

cd ./maple_build/examples/HelloWorld || exit $LINENO

"$MAPLE_BUILD_TOOLS"/java2asm.sh HelloWorld.java || exit $LINENO

"$MAPLE_BUILD_TOOLS"/asm2so.sh HelloWorld.s || exit $LINENO

"$MAPLE_BUILD_TOOLS"/run-app.sh -classpath ./HelloWorld.so HelloWorld

```

下面这个脚本可以下载方舟引擎及编译器,下载和更新`Object.java`文件,编译它并更新到核心库的`.jar`文件,创建核心库`libcore.so`, 编译和运行`HelloWorld`程序。

感谢大家分享宝贵的经验,尤其是 @年轻人啊不要熬夜 [链接](https://gitee.com/openarkcompiler-incubator/maple_engine/issues/I1OVYE#note_2886325) 和 @ystyle [链接](https://gitee.com/openarkcompiler-incubator/maple_engine/issues/I1RQCF#note_3060754),这个脚本中就包含了两位的贡献。

```bash

#!/bin/bash

mkdir -p ~/gitee

cd ~/gitee || exit $LINENO

[ -d maple_engine ] || git clone https://gitee.com/openarkcompiler-incubator/maple_engine.git || exit $LINENO

cd maple_engine || exit $LINENO

source ./envsetup.sh

./maple_build/tools/build-maple.sh >& ../build-maple.log || exit $LINENO

mkdir -p maple_build/jar/java/lang || exit $LINENO

cd maple_build/jar || exit $LINENO

cp ${JAVA_HOME}/jre/lib/{rt,jce,jsse,charsets}.jar . || exit $LINENO

r=$(apt list openjdk-8-jre 2>&1 | grep amd64 | sed 's/.*\(8u[0-9]*-b[0-9]*\).*/\1/')

obj=src/share/classes/java/lang/Object.java

wget -O java/lang/Object.java http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/raw-file/jdk$r/$obj || exit $LINENO

sed -i '/public class Object {/a\long reserved_1; int reserved_2;' java/lang/Object.java

javac -target 1.8 -g java/lang/Object.java || exit $LINENO

jar uf rt.jar java/lang/Object.class || exit $LINENO

cd -

# Build libcore.so

kb=$(grep -e MemAvailable -e SwapFree /proc/meminfo | sed 's/[^0-9]//g' | paste -s -d+ - | bc)

[ $kb -gt 24576000 ] || { echo Please add more swap space to build libcore.so; exit $LINENO; }

./maple_build/tools/build-libcore.sh || exit $LINENO

cd ./maple_build/examples/HelloWorld || exit $LINENO

"$MAPLE_BUILD_TOOLS"/java2asm.sh HelloWorld.java || exit $LINENO

"$MAPLE_BUILD_TOOLS"/asm2so.sh HelloWorld.s || exit $LINENO

"$MAPLE_BUILD_TOOLS"/run-app.sh -classpath ./HelloWorld.so HelloWorld

```