From: mlx AT san DOT rr DOT com (Steve Biskis) Subject: Re: Java JNI with DLL from gcc 21 May 1998 02:52:26 -0700 Message-ID: <199805201441.HAA24038.cygnus.gnu-win32@prefetch-atm.san.rr.com> Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit To: "Andrew Mickish" Cc: Yep. Been there toiled with that. When this happened to me, it was due to stripping the relocatable DLL. This messes up the image. The most complete fix: 1. Upgrade to egcs-1.0.2 for a better gcc.exe ... etc. 2. Upgrade to binutils-2.9 for a usable ld.exe ... etc. If your NOT stripping the DLL than these steps may not solve your problem. Look VERY carefully at the discussion/examples in the relocatable DLLs section of the Cygnus web page. If you absorb that, you're there. ---------- > From: Andrew Mickish > To: gnu-win32 AT cygnus DOT com > Subject: Java JNI with DLL from gcc > Date: Tuesday, May 19, 1998 5:20 AM > > I followed Sun's JNI tutorial example at > > http://java.sun.com/docs/books/tutorial/native1.1/stepbystep/index.html > > and tried to generate the native hello.dll file using Cygnus B19 and gcc 2.7. > I had to change a couple of lines in jdk1.1.5/include/win32/jni_md.h (changed > jlong to be long instead of __int64, and JNIEXPORT to an empty #define instead > of a call to __declspec). After generating the DLL, running the Java main > program popped up a dialog box with: > > "The application or DLL E:\java\HelloWorld\hello.dll is not a valid > Windows NT image. Please check this against your installation diskette." > > The cygwin32 FAQ and archives talk about a five-step process, auxiliary > initialization and cleanup files, and the WINAPI keyword, which I'm hoping is > more compexity than is needed. > > --Andrew Mickish > http://www.andrew.cmu.edu/~am2q/ > > > - > For help on using this list (especially unsubscribing), send a message to > "gnu-win32-request AT cygnus DOT com" with one line of text: "help". - For help on using this list (especially unsubscribing), send a message to "gnu-win32-request AT cygnus DOT com" with one line of text: "help".