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Message-ID: <015101c1e340$a85724e0$967ba8c0@leopard>
From: "William S Fulton" <wsf AT fultondesigns DOT co DOT uk>
To: <mingw32 AT bilbao DOT com>, <cygwin AT cygwin DOT com>
Subject: Re: Does anybody use G++ on Windows to make DLLs?
Date: Sun, 14 Apr 2002 00:12:18 +0100
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You should be using gcc not g++ as JNI requires C linkage. Take a look at
this site for help and tuturials on using Java JNI with cygwin:
http://www.inonit.com/cygwin/

Cheers
William

> I'm trying to create a DLL:
>
> --------------/HelloWorld.cpp/------
> #include <jni.h>
> #include "HelloWorld.h"
> #include <stdio.h>
>
> JNIEXPORT void JNICALL
> Java_HelloWorld_displayMessage(JNIEnv *env, jobject obj)
> {
>     printf("Hello world!\n");
>     return;
> }
>
> And if I try:
> g++.exe HelloWorldImp.dll "HelloWorld.o" -L"d:\Dev-C++\lib"
> -I"d:\Dev-C++\include"  -I"D:\j2sdk\include"
> -I"D:\j2sdk\include\win32"  -I"d:\Dev-C++\include\g++-3"
> -I"d:\Dev-C++\include"
>
> I get this error message:
>
> d:\Dev-C++\lib/libmingw32.a(main.o)(.text+0x8d):main.c:
> undefined reference to `WinMain AT 16'
>
> Any experience?





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