JNI: Library is Found on Path, but Method is not (java.lang.UnsatisfiedLinkError)

Question

I\'m trying to use JNI and getting java.lang.UnsatisfiedLinkError. Unlike the other million questions asked about this, I have the lib on my path, and have even seen the ex

Answer 1

One possible source of the problem might be that you compiled the code using a C++ compiler, which uses a different [calling convention] than plain C. If thats the case then the solution would be to wrap the code for the method in a extern "C" block like this:

#ifdef __cplusplus
extern "C" {
#endif

JNIEXPORT jint JNICALL Java_com_Tune_add
...

#ifdef __cplusplus
}
#endif