为树莓派编译JD2XX

Question

对于Openhab2，有一个名为RFXCOM的绑定附加组件。然而，问题是这个附加组件使用的JD2XX与Raspberry Pi的ARM架构不兼容。

我发现与您可以用它来编译* .so文件的源Github上库：https://github.com/0x6a77/JD2XX

的Makefile中变化不大使用了正确的Java路径（祖鲁 - 8 armhf嵌入式代替（甲骨文-7）。

运行sudo make jni创建*.so文件，我复制到/usr/lib（Java库路径中），但我仍然得到错误的树莓派不能打开共享库因它是32位的，你如何编译一个适用于ARM的共享库和Github存储库提供的源代码。

错误消息：

java.lang.UnsatisfiedLinkError: 
/var/lib/openhab2/tmp/libjd2xx5892592723514582617.so: 
/var/lib/openhab2/tmp/libjd2xx5892592723514582617.so: cannot open shared object file: 
No such file or directory (Possible cause: can't load IA 32-bit .so on a ARM-bit platform) 

树莓裨具有Openhabian全新安装。

链接到该问题在Github上：https://github.com/openhab/openhab2-addons/issues/2316#issuecomment-304795652

编辑：

11:00:52.291 [ERROR] [rnal.discovery.RFXComBridgeDiscovery] - Error occurred during discovery 
java.io.IOException: device not found (2) 
    at jd2xx.JD2XX.listDevices(Native Method) 
    at jd2xx.JD2XX.listDevicesByDescription(JD2XX.java:785) 
    at org.openhab.binding.rfxcom.internal.discovery.RFXComBridgeDiscovery.discoverRfxcom(RFXComBridgeDiscovery.java:89) 
    at org.openhab.binding.rfxcom.internal.discovery.RFXComBridgeDiscovery.startScan(RFXComBridgeDiscovery.java:66) 
    at org.eclipse.smarthome.config.discovery.AbstractDiscoveryService.startScan(AbstractDiscoveryService.java:199) 
    at org.eclipse.smarthome.config.discovery.internal.DiscoveryServiceRegistryImpl.startScan(DiscoveryServiceRegistryImpl.java:382) 
    at org.eclipse.smarthome.config.discovery.internal.DiscoveryServiceRegistryImpl.startScans(DiscoveryServiceRegistryImpl.java:358) 
    at org.eclipse.smarthome.config.discovery.internal.DiscoveryServiceRegistryImpl.startScan(DiscoveryServiceRegistryImpl.java:216) 
    at org.eclipse.smarthome.io.rest.core.discovery.DiscoveryResource.scan(DiscoveryResource.java:84) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[:1.8.0_121] 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)[:1.8.0_121] 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[:1.8.0_121] 
    at java.lang.reflect.Method.invoke(Method.java:498)[:1.8.0_121] 
    at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)[158:org.glassfish.jersey.core.jersey-server:2.22.2] 
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144)[158:org.glassfish.jersey.core.jersey-server:2.22.2] 
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161)[158:org.glassfish.jersey.core.jersey-server:2.22.2] 
    at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:160)[158:org.glassfish.jersey.core.jersey-server:2.22.2] 
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99)[158:org.glassfish.jersey.core.jersey-server:2.22.2] 
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389)[158:org.glassfish.jersey.core.jersey-server:2.22.2] 
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347)[158:org.glassfish.jersey.core.jersey-server:2.22.2] 
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102)[158:org.glassfish.jersey.core.jersey-server:2.22.2] 
    at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326)[158:org.glassfish.jersey.core.jersey-server:2.22.2] 
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)[157:org.glassfish.jersey.core.jersey-common:2.22.2] 
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)[157:org.glassfish.jersey.core.jersey-common:2.22.2] 
    at org.glassfish.jersey.internal.Errors.process(Errors.java:315)[157:org.glassfish.jersey.core.jersey-common:2.22.2] 
    at org.glassfish.jersey.internal.Errors.process(Errors.java:297)[157:org.glassfish.jersey.core.jersey-common:2.22.2] 
    at org.glassfish.jersey.internal.Errors.process(Errors.java:267)[157:org.glassfish.jersey.core.jersey-common:2.22.2] 
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)[157:org.glassfish.jersey.core.jersey-common:2.22.2] 
    at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305)[158:org.glassfish.jersey.core.jersey-server:2.22.2] 
    at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154)[158:org.glassfish.jersey.core.jersey-server:2.22.2] 
    at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:473)[155:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2] 
    at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:427)[155:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2] 
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:388)[155:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2] 
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:341)[155:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2] 
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:228)[155:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2] 
    at com.eclipsesource.jaxrs.publisher.internal.ServletContainerBridge.service(ServletContainerBridge.java:76)[10:com.eclipsesource.jaxrs.publisher:5.3.1.201602281253] 
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812)[81:org.eclipse.jetty.servlet:9.2.19.v20160908] 
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:587)[81:org.eclipse.jetty.servlet:9.2.19.v20160908] 
    at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.doHandle(HttpServiceServletHandler.java:71)[172:org.ops4j.pax.web.pax-web-jetty:4.3.0] 
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)[80:org.eclipse.jetty.server:9.2.19.v20160908] 
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)[79:org.eclipse.jetty.security:9.2.19.v20160908] 
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)[80:org.eclipse.jetty.server:9.2.19.v20160908] 
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)[80:org.eclipse.jetty.server:9.2.19.v20160908] 
    at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.doHandle(HttpServiceContext.java:287)[172:org.ops4j.pax.web.pax-web-jetty:4.3.0] 
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)[81:org.eclipse.jetty.servlet:9.2.19.v20160908] 
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)[80:org.eclipse.jetty.server:9.2.19.v20160908] 
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)[80:org.eclipse.jetty.server:9.2.19.v20160908] 
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)[80:org.eclipse.jetty.server:9.2.19.v20160908] 
    at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:80)[172:org.ops4j.pax.web.pax-web-jetty:4.3.0] 
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)[80:org.eclipse.jetty.server:9.2.19.v20160908] 
    at org.eclipse.jetty.server.Server.handle(Server.java:499)[80:org.eclipse.jetty.server:9.2.19.v20160908] 
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)[80:org.eclipse.jetty.server:9.2.19.v20160908] 
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)[80:org.eclipse.jetty.server:9.2.19.v20160908] 
    at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)[72:org.eclipse.jetty.io:9.2.19.v20160908] 
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)[83:org.eclipse.jetty.util:9.2.19.v20160908] 
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)[83:org.eclipse.jetty.util:9.2.19.v20160908] 
    at java.lang.Thread.run(Thread.java:745)[:1.8.0_121] 
11:01:02.868 [WARN ] [e.sshd.server.channel.ChannelSession] - Unknown pty opcode value: 42 

Answer 1

在JD2XX.java文件，你可以看到机制是如何加载一个dll，这样或一些其他类型的库取决于操作系统。

static { 
    String dataModel = System.getProperty("sun.arch.data.model"); 
    String osName = System.getProperty("os.name").toLowerCase();; 

    StringBuilder lib = new StringBuilder("/jni/"); 

    if (osName.contains("win")) 
     lib.append("win/"); 
    else if (osName.contains("linux")) 
     lib.append("linux/"); 
    else if (osName.contains("mac")) 
     lib.append("mac/"); 
    else 
     throw new UnsatisfiedLinkError("Loading JD2XX JNI: Unsupported operating system ("+osName+")"); 

    if (dataModel.equals("32")) 
     lib.append("x86_32/"); 
    else if (dataModel.equals("64")) 
     lib.append("x86_64/"); 
    else 
     throw new UnsatisfiedLinkError("Loading JD2XX JNI: Unknown runtime data model ("+dataModel+")"); 

    if (osName.contains("win")) 
     lib.append("jd2xx.dll"); 
    else if (osName.contains("linux")) 
     lib.append("libjd2xx.so"); 
    else if (osName.contains("mac")) 
     lib.append("libjd2xx.jnilib"); 

    try { 
     NativeUtils.loadLibraryFromJar(lib.toString()); 
    } catch (IOException e) { 
     throw new UnsatisfiedLinkError(e.getMessage()); 
    } 
} 

从NativeUtils的loadLibraryFromJar方法创建临时目录和操作系统复制正确的库来临时目录然后最终调用System.load方法。 因此，我认为如果可能的话，您应该修改源代码的这一部分，如下所示。

static 
{ 
    System.load("/var/lib/openhab2/tmp/libjd2xx5892592723514582617.so"); 
} 

或

static 
{ 
    System.load("/usr/lib/libjd2xx5892592723514582617.so"); 
} 

有几种方法，使这项工作的工作重新设置“的java.library.path”以第一指示/ usr/lib目录，然后使用下面的代码。

或者您可以将库名称libjd2xx5892592723514582617.so重命名为/ usr/lib中的libjd2xx.so，它通常位于'LD_LIBRARY_PATH'变量中。

然后，我们在JD2XX.java代码可以用来代替，

static 
{ 
    System.loadLibrary("jd2xx"); 
} 

我认为它的工作原理..