Hi, Andrew. You had helped me very much last month trying to integrate Java and C++ using gcj/gcjh. I've run into problems (both using the gcj/gcjh .so approach and the Java Invocation API approach). I can present details about the specific problems but I'm wondering if you knew of problems in general with generating a Java library using JDK 1.5 and then using that .jar file with g++/gcj 4.1.2. I needed to use both JDK and gcj since the Java source code uses generics which gcj won't compile and I'm using g++ for my C++ compiler. I had problems loading and calling the Java library using JDK 1.6 and g ++/gcj and then switched to compiling with JDK 1.5. This got me to my present situation of segmentation errors showing up. I'm suspecting the mixing of JDK and g++/gcj as a problem area because of the problems I saw using JDK 1.6 and also because of the following. I have C++ code that uses the Java Invocation API to load the Java library and make calls into it. The Java library also has a native method that calls back into C (and then C++). However, I get strange segmentation errors from the JVM with the C++ code that is called back from the Java library. I have the C++ code running in its own thread (spawned after the native method is invoked) with the stack trace from the JVM crash showing all C/C++ code. I am puzzled why the JVM would crash with a call stack like this. That's why I'm suspecting a larger problem of JDK and g++/gcj not working well together. Do you have experience with these types of problems? I can provide more detail if that's helpful but I want to see if someone else knows of problems mixing JDK 1.5 and g++/gcj 4.1.2 before I spend any more time looking into this. Do you know of problems mixing JDK and gcj? Thank you very much for all your help! -Joe
