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Date: Wed, 18 Apr 2001 16:59:39 -0400
To: Bill Grigg <wgrigg AT draper DOT com>, cygwin AT cygwin DOT com
From: "Larry Hall (RFK Partners, Inc)" <lhall AT rfk DOT com>
Subject: Re: stripped dlls
In-Reply-To: <NNEBIAGHCEGPBHKMPLBHAEOECKAA.wgrigg@draper.com>
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At 04:07 PM 4/18/2001, Bill Grigg wrote:
>In an ongoing attempt to link to a dll that was produced by MS VC++ I have
>the following situation:
>
>1. When using the example (in the user manual section entitled - Linking
>Against DLLs) on how to produce a library (MYDLL.a) file from the dll
>(MYDLL.dll) I get the error message that there are "no symbols" in the dll.
>It says the technique shown will only work if the dll is not "stripped".
>
>2. How do I get MS VC++ to generate a dll that is not "stripped"?
>
>3. I did try linking with MYDLL.lib which does not work.
>
>4. I also tried building MYDLL.a from MYDLL.lib using the aforementioned
>technique. This appeared to work in that it generated MYDLL.a which was rich
>with entry points. Unfortunately, none of them matched.
>
>5. I have tried declaring the functions with the following:
>
>         extern int  __declspec(dllimport) Get_Status_Nav (struct NAV_STAT_MSG* m);
>
>6. The cygwin (or GNU) linker complains with:
>
>         undefined reference to _imp__Get_Status_Nav
>
>7. When I leave off the __declspec(dllimport) qualifier I get:
>
>         undefined reference to Get_Status_Nav
>
>Any suggestions would be appeciated.
>
>BTW: thanks to Larry Hall who has been helping me along on this effort.


Maybe I didn't mention this - I thought I did.  You need to specify the 
stdcall calling convention.  This means add __attribute__((stdcall)) to your 
declaration.


Larry Hall                              lhall AT rfk DOT com
RFK Partners, Inc.                      http://www.rfk.com
118 Washington Street                   (508) 893-9779 - RFK Office
Holliston, MA 01746                     (508) 893-9889 - FAX


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