Using boost asio in JVMTI?

Question

Hi,
This is probably a long shot, but I'm going to try and ask anyway. I've got an
application in which I have to do some profiling of Java software. The profiler
has to communicate with a client via sockets (may sound strange, but that's the
way it is). At any rate, I wanted to make the code as portable as possible, so I
started trying to use the boost asio libraries. Here's the thing, I can get my
profiler to start just fine as long as I don't #include <boost/asio.hpp>. As
soon as I do that, the agent won't load. Here is a very simple example program:
//standard header files.
#include "stdafx.h"
#include <iostream>
#include <sys/types.h>
//#include <boost/asio.hpp>
#include "jni.h"
#include "jvmti.h"
/** all callbacks must be extern C */
extern "C" {
JNIEXPORT jint JNICALL Agent_OnLoad(JavaVM *vm, char *options, void *reserved) {
     std::cout << "Agent loaded..." << std::endl;
     return JNI_OK;
JNIEXPORT void JNICALL Agent_OnUnload(JavaVM *vm) {
     std::cout << "Agent unloaded..." << std::endl;
}The above works fine, but if I uncomment the #include <boost/asio.hpp>, it dies
with the standard (uninformative) JVMTI error. Here is my linking command (using
mingw on windows XP).
g++ -LC:\Program Files\Java\jdk1.6.0_03\lib -LE:\boost\boost_1_38_0\stage\lib
-static-libgcc -shared -Wl,-soname=Tester,--kill-at -oTester.dll src\stdafx.o
src\dllmain.o src\communication\Command.o src\Tester.o -lws2_32
-lboost_date_time-mgw34-mt -lboost_system-mgw34-mt -lboost_thread-mgw34-mt
-lboost_iostreams-mgw34-mt -lboost_filesystem-mgw34-mt
cmd /c copy Tester.dll ..\Tester.dll
Any ideas? Am I missing a library? Thanks.
Del

Answer 1

I discovered the problem: I'm linking with g++ from mingw on windows. mingw, for some reason, builds the libraries as .lib files where g++ expects .a files. So, it wasn't linking properly. I had to rename all of my .libs to .as