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RE: Using cygwin and JAVA/JNI

I have been using Cygwin GCC 3.2 to build JNI DLLs that use <iostream>
without difficulty.  I have done the following things:

- put -mno-cygwin -D_REENTRANT -D_GNU_SOURCE -D__int64="long long" on the
compiler command line
- put -mno-cygwin -Wl,--add-stdcall-alias on the linker command line

See the Cygwin FAQ at for info
on -mno-cygwin.

Mike Bresnahan
> -----Original Message-----
> From: []On Behalf
> Of Alan Thompson
> Sent: Wednesday, February 05, 2003 8:18 PM
> To:
> Subject: Using cygwin and JAVA/JNI
> >
> >Hi all - I have been doing some JNI stuff to integrate our
> legacy software, and I have had very good luck following the
> examples at .  The
> only twist is that I've been using g++ instead of gcc, which
> simplifies the non-java part.
> >
> >Here's a question, though:  I cannot for the life of me figure
> out how to use the C++ <iostream> in any of the code!  For some
> reason, the "-mno-cygwin" flag kills the ability of g++ to either
> compile or link any code referring to <iostream>.  This means one
> is stuck using good old printf(), instead of the more modern way.
>  No matter how I break up the complies, it still fails at the
> linking stage (when -mno-cygwin is still required, according to
> my experiments).
> >
> >Does anyone have any ideas?  Also, I've been unable to find any
> documentation on the -mno-cygwin flag in the gcc/g++ man pages.
> Can anyone point me to where this comes from and/or is documented?
> >
> >Thanks again for all of the help,
> >Alan Thompson
> >
> >P.S.  I've been using Cygwin for quite a while now ant it's
> fantastic when you're chained to a windoze machine....
> >

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