Cygwin compiled DLL under Visual C++

[Schaible, Joerg]

Hi Hans,

well it seems that you've lost - sorry to say that. You try to link
incompatible run-time libraries and I doubt that you will get any further.
Please check the archives, this is a well-known fact and not Cygwin
specific. You would have similar problems using e.g. the Borland run-time.
OTOH, a lot of developers would like to see this kind of compatibility and
since Cygwin is open source, you (or your company) may want to volunteer.

Greetings,
Jörg


>-----Original Message-----
>From: Hans Holberg [ mailto:holberg@o-s-c.de ]
>Sent: Monday, February 19, 2001 4:54 PM
>To: cygwin@cygwin.com
>Subject: Cygwin compiled DLL under Visual C++
>
>
>Dear Cygwin-Support!
>Dear Christopher Faylor,
>we at OSC have bought 2000 seats of Cygwin for our product development.
>We have developed a lot of functionality under Solaris, so we 
>use Cygwin for
>the NT-Port.
>We also have a separate platform independent GUI development with QT
>(Trolltech) and C++.
>It is not possible to compiler/or use QT under Cygwin. So we 
>have developed
>the GUI
>with QT under Visual C++. In order to access our ported 
>functionality we
>have built a DLL
>under Cygwin (1.1.4 and 1.1.8) with the dlltool. Then we have 
>linked the DLL
>in our QT Visual C++
>Project and we could link an executable. But it crashed! Then 
>we tried a
>simple function without
>Cygwin specific parts as a DLL (same procedure). It worked. 
>Then we used the
>fprintf() function
>in the Cygwin world in the DLL and it crashed again. So we 
>tried if Visual
>C++ is the problem or not.
>And it is not the problem, because we have linked the simple 
>DLL in a Cygwin
>C++ (G++) program,
>-> same crash!
>
>Please give us an advise how we can generate a running DLL 
>under Cygwin (in
>C) in  order to
>use it in a Visual C++ project.
>
>If you need more information I can send you the error messages and a
>description of
>how we have generated the DLL.
>
>I really hope you can help us, because we have some hard deadlines.
>Thanks
>Hans Juergen Holberg
>
>_______________________________________________________________
>_____________
>OSC - OFFIS Systems and Consulting GMBH, Industriestr. 11, 
>D-26121 Oldenburg
>Dipl.Inform.  Hans J. Holberg               Phone +49 (0) 4 41 
>3 50 42 -3 14
>Director Consulting Embedded Systems          Sekr.: -3 00     
>   Fax: -3 80
>E:Mail  holberg@o-s-c.de                            URL: 
http://www.o-s-c.de
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