使用MINGW构建JNI DLL [英] Build a JNI DLL using MINGW

问题描述

我正在尝试创建一个将调用Qt的DLL(当前，我无法使用Jambi来实现所需的功能).我有一个简单的Java方法:

I am trying to create a DLL that will call Qt (currently I can't use Jambi for the functionality I need). I have a simple Java method:

public final native int createChild(int handle);

我在Visual Studio Express 2010中创建了C项目，并且能够构建DLL.

I created C project in Visual Studio Express 2010 and was able to build the DLL.

然后，我在Qt Creator中创建了一个项目，并将我的源代码移到了那里.我尝试尽我所能配置该版本，但我得到的只是:

Then I created a project in Qt creator and moved my sources there. I tried to configure the build to a best of my knowledge but all I get is:

java.lang.UnsatisfiedLinkError: tools.proofofconcept.control.EmbedderComposite.createChild(I)I

我的猜测是该符号未从DLL中正确导出.我添加了-D_JNI_IMPLEMENTATION_链接器arg:

My guess is that symbol is not properly exported from DLL. I added -D_JNI_IMPLEMENTATION_ linker arg:

g++ -D_JNI_IMPLEMENTATION_  -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc -shared -mthreads -Wl -Wl,--out-implib,debug\libqt_integration.a -o debug\qt_integration.dll debug/dllmain.o debug/nativecode.o debug/qmfcapp.o debug/qwinwidget.o debug/moc_qwinwidget.o  -L"c:\Qt\2010.05-rc1\qt\lib" -lQtGuid4 -lQtCored4 

推荐答案

我应该添加以下参数:

-Wl,--kill-at

它将更改导出的符号格式.

It will change exported symbols format.

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