编译Android 7.0遇到的问题

硬件平台：rk3128

Android版本：7.0

kernel版本：3.10.104

ubuntu版本：ubuntu 16.04

一、

问题描述：编译kernel时错误：/bin/sh: 1: lzop: not found

解决方法：这个碰到过好多次了，安装即可：sudo apt-get install lzop

二、

问题描述：编译android报错

Out of memory error (version 1.2-rc4 'Carnac' (298900 f95d7bdecfceb327f9d201a1348397ed8a843843 by android-jack-team@google.com)).
GC overhead limit exceeded.
Try increasing heap size with java option '-Xmx<size>'.
Warning: This may have produced partial or corrupted output.

解决方法：这个网上已经有很多了，解决办法是打开prebuilts/sdk/tools/jack-admin

JACK_SERVER_COMMAND="java -XX:MaxJavaStackTraceDepth=-1 -Djava.io.tmpdir=$TMPDIR $JACK_SERVER_VM_ARGUMENTS -cp $LAUNCHER_JAR $LAUNCHER_NAME"

修改为

JACK_SERVER_COMMAND="java -XX:MaxJavaStackTraceDepth=-1 -Djava.io.tmpdir=$TMPDIR $JACK_SERVER_VM_ARGUMENTS -Xmx4g -cp $LAUNCHER_JAR $LAUNCHER_NAME"

但是编译始终还是有问题，报如下错误：

FAILED: /bin/bash -c "(mkdir -p out/target/common/obj/JAVA_LIBRARIES/sdk_v22_intermediates/classes.jack.tmpjill.res ) && (unzip -qo prebuilts/sdk/22/android.jar -d out/target/common/obj/JAVA_LIBRARIES/sdk_v22_intermediates/classes.jack.tmpjill.res ) && (find out/target/common/obj/JAVA_LIBRARIES/sdk_v22_intermediates/classes.jack.tmpjill.res -iname \"*.class\" -delete ) && (JACK_VERSION=3.36.CANDIDATE out/host/linux-x86/bin/jack @build/core/jack-default.args --verbose error  -D jack.import.resource.policy=keep-first -D jack.import.type.policy=keep-first -D jack.android.min-api-level=1 --import prebuilts/sdk/22/android.jar --import-resource out/target/common/obj/JAVA_LIBRARIES/sdk_v22_intermediates/classes.jack.tmpjill.res --output-jack out/target/common/obj/JAVA_LIBRARIES/sdk_v22_intermediates/classes.jack ) && (rm -rf out/target/common/obj/JAVA_LIBRARIES/sdk_v22_intermediates/classes.jack.tmpjill.res )"
java.lang.AssertionError
    at com.android.sched.scheduler.MultiWorkersScheduleInstance.process(MultiWorkersScheduleInstance.java:523)
    at com.android.jack.Jack.run(Jack.java:738)
    at com.android.jack.Jack.checkAndRun(Jack.java:412)
    at com.android.jack.CommandLine.runJack(CommandLine.java:79)
    at com.android.jack.api.v01.impl.Cli01CompilationTaskImpl.run(Cli01CompilationTaskImpl.java:85)
    at com.android.jack.server.tasks.JackTask.handle(JackTask.java:168)
    at com.android.jack.server.tasks.SynchronousServiceTask.handle(SynchronousServiceTask.java:49)
    at com.android.jack.server.tasks.JackTask.handle(JackTask.java:55)
    at com.android.jack.server.router.PathRouter.handle(PathRouter.java:65)
    at com.android.jack.server.router.ContentTypeParameterRouter.handle(ContentTypeParameterRouter.java:84)
    at com.android.jack.server.router.ContentTypeRouter.handle(ContentTypeRouter.java:82)
    at com.android.jack.server.router.ContentTypeRouter.handle(ContentTypeRouter.java:82)
    at com.android.jack.server.router.ContentTypeRouter.handle(ContentTypeRouter.java:82)
    at com.android.jack.server.router.ContentTypeParameterRouter.handle(ContentTypeParameterRouter.java:84)
    at com.android.jack.server.router.ContentTypeRouter.handle(ContentTypeRouter.java:82)
    at com.android.jack.server.router.ContentTypeRouter.handle(ContentTypeRouter.java:82)
    at com.android.jack.server.router.MethodRouter.handle(MethodRouter.java:67)
    at com.android.jack.server.router.RootContainer.handle(RootContainer.java:49)
    at org.simpleframework.http.core.RequestDispatcher.dispatch(RequestDispatcher.java:121)
    at org.simpleframework.http.core.RequestDispatcher.run(RequestDispatcher.java:103)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:748)

Internal compiler error (version 1.2-rc4 'Carnac' (298900 f95d7bdecfceb327f9d201a1348397ed8a843843 by android-jack-team@google.com)).
Warning: This may have produced partial or corrupted output.
[ 31% 11462/35877] build out/target/common/obj/JAVA_LIBRARIES/sdk_v18_intermediates/classes.jack
ninja: build stopped: subcommand failed.
build/core/ninja.mk:148: recipe for target 'ninja_wrapper' failed
make: *** [ninja_wrapper] Error 1

查了好久也没有结果，因为我的电脑内存只有4G，我就想会不会是4G太大了，然后改成-Xmx2g，还是会报OOM错误，最后改成-Xmx3g，编译通过，看来是电脑配置太低的原因。

对了修改完后要先停止服务：./prebuilts/sdk/tools/jack-admin stop-server

三、我把android 7.0源码下的.repo删除后，编译也会报错，难道必须有.repo或.git目录才可以吗？