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由于 firefox 12 sdk 删除了“代理”对象，我想通过 nsRunnable使用跨线程调用。我基本上做了代码的复制和粘贴：

class NotifyTask : public nsRunnable
{
public:
  NotifyTask(nsISupports *subject, const char *topic, bool remref)
    : mWorkerThread(do_GetCurrentThread())
  {
    MOZ_ASSERT(!NS_IsMainThread()); // This should be running on the worker thread
  }

  NS_IMETHOD Run() {
    MOZ_ASSERT(NS_IsMainThread()); // This method is supposed to run on the main thread!

    mWorkerThread->Shutdown();
    return NS_OK;
  }

private:
  nsCOMPtr<nsIThread> mWorkerThread;
};

我试图编译它。我收到以下错误：

g++ -std=gnu++0x -Wall -O2 -c  -DUSE_LIBUSB -fPIC -DHAVE_CRYPTO -fpermissive -DCRYPTPP -fshort-wchar -I../../xulrunner-sdk/include -o gipsy.o gipsy.cpp
gipsy.cpp:74:7: warning: ‘NotifyTask’ declared with greater visibility than the type of its field ‘NotifyTask::<anonymous>’ [-Wattributes]
gipsy.cpp:74:7: warning: ‘NotifyTask’ declared with greater visibility than its base ‘nsRunnable’ [-Wattributes]
g++ -std=gnu++0x -Wl,-z,defs -Wall -Os -o gipsy.so -shared gipsy.o gipsymodule.o tracklog.o gpslib/data.o gpslib/garmin.o gpslib/gps.o gpslib/phys.o gpslib/igc.o gpslib/aircotec.o cp1250.o prefparser.o gpslib/foreignigc.o gpslib/mlr.o gpslib/flymaster.o gpslib/compeo.o gpslib/iq.o ../libs/libcryptopp.a -lusb -L../../xulrunner-sdk/lib -lxpcomglue_s -lxul -lxpcom -lplds4 -lplc4 -lnspr4 -lpthread -ldl -lmozalloc
gipsy.o:(.data.rel.ro._ZTI10NotifyTask[typeinfo for NotifyTask]+0x10): undefined reference to `typeinfo for nsRunnable'
collect2: ld returned 1 exit status

根据g++ undefined reference to typeinfo，可能是 gecko sdk 是使用 -fvisibility=hidden 和一些奇怪的“不同 .so 中的关键方法”构建的。这是 Gecko sdk 中的错误还是我做错了什么？

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1 回答 1

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gecko SDK 没有与 RTTI 链接 - 将“-fno-rtti”参数添加到特定的 .o 文件修复了问题。

于 2012-05-17T16:28:54.343 回答