Undefined Reference Trying to invoke Java from C++

[Hunter McMillen]

I am trying to create a Java virtual machine from C++ and invoke the main method passing a String argument to the main method of the Java program. I am following this example found on Sun's website: http://java.sun.com/docs/books/jni/html/invoke.html#11202

Here is the simple Java Program:

    public class TestJNIInvoke
    {
        public static void main(String[] args)
        {
    	    System.out.println(args[0]);
        }
    }

Here is the C++ program I am using to (try to) invoke the JVM:

    #include <jni.h>
    #include <cstdlib>
    
    using namespace std;
     
    int main() 
    {
         JNIEnv *env;
         JavaVM *jvm;
         jint res;
         jclass cls;
         jmethodID mid;
         jstring jstr;
         jclass stringClass;
         jobjectArray args;
     
         JavaVMInitArgs vm_args;
         JavaVMOption* options = new JavaVMOption[1]; //LINE 18 ERROR
         options[0].optionString = 
               (char*)&"-Djava.class.path=C:\\Program Files\\Java\\jdk1.7.0\\bin";
         vm_args.version = JNI_VERSION_1_6;
         vm_args.nOptions = 1;
         vm_args.options = options;
         vm_args.ignoreUnrecognized = false;

         /* load and initialize a Java VM, return a JNI interface
          * pointer in env */
         res = JNI_CreateJavaVM(&jvm, (void**)&env, &vm_args); //LINE 26 ERROR
         
         if (res < 0) 
           {
             fprintf(stderr, "Can't create Java VM\n");
             exit(1);
           }
         cls = env->FindClass("TestJNIInvoke");
         if (cls == NULL) 
           {
             goto destroy;
           }
     
         mid = env->GetStaticMethodID(cls, "main",
    				  "([Ljava/lang/String;)V");
         if (mid == NULL) 
           {
             goto destroy;
           }
         jstr = env->NewStringUTF(" from CPP!");
         if (jstr == NULL) 
           {
             goto destroy;
           }
         stringClass = env->FindClass("java/lang/String");
         args = env->NewObjectArray(1, stringClass, jstr);
         if (args == NULL) 
           {
             goto destroy;
           }
         env->CallStaticVoidMethod(cls, mid, args);
     
     destroy:
         if (env->ExceptionOccurred()) 
           {
    	      env->ExceptionDescribe();
           }
         jvm->DestroyJavaVM();
    }

Anyway If I just compile the file with:

   gcc -I"c:\Program Files\Java\jdk1.7.0\include" 
            -I"c:\Program Files\Java\jdk1.7.0\include\win32" -c TestJNIInvoke.cpp

It compiles fine, but when I try to compile and link:

 gcc -I"c:\Program Files\Java\jdk1.7.0\include" 
            -I"c:\Program Files\Java\jdk1.7.0\include\win32" -g TestJNIInvoke.cpp

I get two weird errors that I don't understand:

TestJNIInvoke.cpp:18: undefined reference to `operator new[](unsigned int)'
TestJNIInvoke.cpp:26: undefined reference to `_imp__JNI_CreateJavaVM@12'
collect2: ld returned 1 exit status

I marked the lines in the above code where the error is occuring, has anyone encountered this problem before?

Any ideas/links would be great

Thanks


Also posted here: http://stackoverflow.com/questions/7547206/undefined-reference-trying-to-invoke-java-from-c