Hi Kevin-
Thanks for taking a look, but...
You apparently forgot the "-jni" switch for javah. You generated a
"test.h" for the old JDK 1.0 native interface, not the 1.1 JNI...
Bob L.
Kevin B. Hendricks wrote:
> Hi,
>
> I tried your example code and it did not seg-fault. I received an
> unsatisfied link error. Upon closer examination, the test.h file generated
> by javah did not seem to be correct (i.e. it did not match your declaration
> or parameter list in hello.C
>
> Using nm on libhello.so showed this to be the case (some C++ name mangling?)
>
> I simply copied the declaration from hello.C and replaced the appropriate
> part of test.h with the correct (i.e. matching) declaration
>
> Then my unsatified link error went away and everything worked fine.
>
> There seems to be some trouble with javah and C++. I am not sure exactly
> what is up.
>
> Anyway, here are my slightly modified pieces of code:
>
[snip]
> And finally the "fixed" Test.h header file which you can compare to the one
> generated by javah.
>
> /* DO NOT EDIT THIS FILE - it is machine generated */
> #include <native.h>
> /* Header for class Test */
>
> #ifndef _Included_Test
> #define _Included_Test
>
> #pragma pack(4)
>
> typedef struct ClassTest {
> char PAD; /* ANSI C requires structures to have a least one member */
> } ClassTest;
> HandleTo(Test);
>
> #pragma pack()
>
> #ifdef __cplusplus
> extern "C" {
> #endif
>
> JNIEXPORT void JNICALL Java_Test_display(JNIEnv *env, jobject obj);
>
> #ifdef __cplusplus
> }
> #endif
> #endif
>
>
> I hope this helps.
>
> I don't know why this is happening. If this solution makes "no sense" to
> you please submit an official bug report to the Blackdown Jitterbug bug
> database.
>
> Kevin
> Blackdown JDK Poriting Team
>
> ----------------------------------------------------------
> Kevin B. Hendricks
> Associate Professor, Operations & Information Technology
> School of Business, College of William & Mary
> Williamsburg, VA 23187, [EMAIL PROTECTED]
> http://business.tyler.wm.edu
--
Robert Lynch-Berkeley CA [EMAIL PROTECTED]
http://www.best.com/~rmlynch/
