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Java JNI with DLL from gcc
- To: gnu-win32 at cygnus dot com
- Subject: Java JNI with DLL from gcc
- From: Andrew Mickish <mickish at cmu dot edu>
- Date: Tue, 19 May 1998 08:20:45 -0400
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/
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