Need help linking to bundle on OS X

Question

I'm an experienced Java coder, but I'm new to XCode and C++, so sorry for the dumb question.

I'm writing some c++ code in XCode that needs to instantiate a Java Virtual Machine. There is a method in the OS X Java plugin called JavaVM_GetJNIEnv(), and a header file in the source code from Sun/Oracle called JavaVM.h with these lines:

// Gets the JNIEnv* associated with the Java VM, creating the JVM
// instance if necessary. Note that the implementation of this routine
// must be prepared for it to be called from more than one thread.
JNIEnv* JavaVM_GetJNIEnv();

I added the .h file to my XCode project, but I don't know how to link to the binary file. I figured out how to force-load in the linker, like this:

-force_load /System/Library/Java/Support/Deploy.bundle/Contents/Resources/JavaPlugin2_NPAPI.plugin/Contents/MacOS/JavaPlugin2_NPAPI

(this file is a symbolic link; the real path is /System/Library/Java/Support/Deploy.bundle/Contents/Resources/JavaPlugin2_NPAPI.plugin/Contents/Resources/Java/libplugin2_npapi.jnilib)

But then I get this error message:

ld: in /System/Library/Java/Support/Deploy.bundle/Contents/Resources/JavaPlugin2_NPAPI.plugin/Contents/MacOS/JavaPlugin2_NPAPI, can't link with bundle (MH_BUNDLE) only dylibs (MH_DYLIB)
collect2: ld returned 1 exit status

So my question is, how do I link to code in a .jnilib file with XCode?

Answer 1

You need to link to frameworks, not bundles. Choose 'Add Existing Framework' and select JavaVM.framework, and Xcode should handle the rest!