Re: Using cygwin and JAVA/JNI

["gilles BOURGEOIS" <gbourgeois at yaccom dot com>]

thanks a lot,
actually, with -Wl,--add-stdcall-alias to the gcc line, all worked fine.



----- Original Message -----
From: "friedman_hill ernest j" <ejfried@ca.sandia.gov>
To: <cygwin@cygwin.com>
Sent: Friday, January 17, 2003 5:27 PM
Subject: Re: Using cygwin and JAVA/JNI


>
> Randall is usually 100% right about everything, but here he's actually
> not. I haven't done it in a long time, but I've certainly written JNI
> libraries with cygwin -- and in fact, used some fairly cygwin specific
> features in doing so (my JNI library explicitly used dlopen() to open
> another library, as I recall, and it all worked; and furthermore, much
> of my library was written in C++, but the JNI entry points were
> exported as 'extern "C".') I was amazed and thrilled when it all
> worked.
>
> When I did this, Mumit Khan's web page on the topic was invaluable,
> but cygwin has changed a lot since then, so I'm sure the information
> is out of date. Anyway, you might start by looking at the JNI links
> halfway down this page:
>
>    http://www.xraylith.wisc.edu/~khan/software/gnu-win32/
>
>
> I think Randall R Schulz wrote:
> > Gilles,
> >
> > I don't believe the ABI (application binary interface) used by the
> > Microsoft compilers is compatible with that used by GCC and hence the
Sun
> > JVM, being compiled by the Microsoft tools, cannot access GCC-compiled
> > libraries via JNI.
> >
> > Randall Schulz
> >
> >
> > At 06:41 2003-01-17, gilles BOURGEOIS wrote:
> > >hello
> > >
> > >I wonder if it is possible to use JNI upon a DLL .i.e a shared libray
like
> > >.so file generated with gcc, without the mno-cygwin option. (my lib
uses
> > >IPC SYSTEM V, that is why I rely on the cygwin and cygipc libraries) I
am
> > >not a newbie with java/jni or gcc, but mixing all of them seems to
crash
> > >the JVM. Of course, It works if the library is generated with gcc under
> > >linux but if executing the whole program (JVM instantiate) under
cygwin,
> > >it fails. Any one ever performed such a tricky architecture? thanks
> > >
> > >gilles
> >
> >
> > --
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>
>
> ---------------------------------------------------------
> Ernest Friedman-Hill
> Distributed Systems Research        Phone: (925) 294-2154
> Sandia National Labs                FAX:   (925) 294-2234
> PO Box 969, MS 9012                 ejfried@ca.sandia.gov
> Livermore, CA 94550         http://herzberg.ca.sandia.gov
>
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>



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