From: jdoyle AT sarnoff DOT com (JAMES DOYLE)
Subject: Re: JNI functions under g++
30 Oct 1998 09:47:32 -0800
Message-ID: <363884CA.B4B93295.cygnus.gnu-win32@sarnoff.com>
References: <Pine DOT SUN DOT 3 DOT 93 DOT 981029001825 DOT 29641C-100000 AT modi DOT xraylith DOT wisc DOT edu>
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To: Mumit Khan <khan AT xraylith DOT wisc DOT edu>
Cc: Gnu Win32 Mailing List <gnu-win32 AT cygnus DOT com>

Sounds great!  I thought that you had said there was a large
problem in invoking cygwin-linked DLLs from MSVC-linked apps,
such as Java.  Did you get around that problem?

BTW, I found out that my problem with MSVC was that one DLL was deleting
memory that was newed in a different DLL, which apparently does not
work at all.  Do you happen to know whether this is normal
shared library behavior?  It doesn't happen with shared objects
on Solaris, so I don't know if it's a Windows problem, or just an
MSVC problem.  Would it happen with cygwin DLLs, do you think?

Regards,
Jim

Mumit Khan wrote:
> 
> On Fri, 23 Oct 1998, JAMES DOYLE wrote:
> 
> > Hi,
> >       I've been using Gnu tools for years, but only
> > recently needed to use them under Win32.  The reason I wanted
> > to try using the Win32 port is that I'm having mystifying problems
> > under Microsoft Visual C++.  I've been able to use VC++ in the past
> > to do JNI functions where I use malloc/free, but recently I've
> > needed to access C++ libraries that use new/delete, and under VC++
> > this is causing me problems.  Since things run fine on Solaris
> > with g++, I figured I'd try g++ on Windows.
> 
> Fyi, with the latest changes I've submitted to cygwin, it's now possible
> to build both C and C++ JNI DLLs with cygwin GCC. I only tried the most
> trivial JNI DLLs, so let's see what more bugs are hiding. The test cases
> did include memory allocation (both malloc and new families) and standard
> I/O (both printf and iostreams).
> 
> I don't know if the changes will be accepted however (that depends on
> the quality of the patch, and Geoffrey will have to decide if it's
> ok).
> 
> Regards,
> Mumit
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