From:	anorland AT hem2 DOT passagen DOT se (Anders Norlander)
Subject:	Re: third party DLL lib references
7 Nov 1998 03:06:40 -0800 :
Message-ID:	<3642B097.7EDFB42C.cygnus.gnu-win32@hem2.passagen.se>
References:	<19981105003416 DOT 7380 DOT qmail AT findmail DOT com>
Mime-Version:	1.0
To:	Matthew Thompson <msthomp AT handbiolab DOT com>
Cc:	gnu-win32 AT cygnus DOT com

Matthew Thompson wrote:
> 
> Hi,
> 
> I'm sure everyone is sick of questions from people linking to third
> party DLL's, so sorry in advance for possibly beating a dead horse (to
> death even!). In case you're wondering, I have read all the FAQs,
> downloaded all the tools, done the archive searches, etc. I still think
> I may have a unique problem (or possibly I am being dumb in a unique way).
> 
> I am linking to a 3rd party DAQ dll that is written for MSVC++. When I
> use pexport to create a ref file, I get the proper reference names,
> but they are preceded and followed by trash characters. Using the

What do you mean by trash characters?

> dlltool then gives me errors (not the one stemming from leaving the dll
> name in the first row - I deleted it) and I can't create a library.
> 
> My next step was to type in a ref file by hand using all the proper
> procedure names. Dlltool then seems to work, creating a lib file
> with no errors. However, when I link to that lib file, I get the
> following error for every function call I make to the dll:
> C:\WINDOWS\TEMP\cc0010161.o(.text+0x3f):test2.cc: undefined
> reference to `rdd_detect_RTD_boards(short, rdd_board_type_t *, short *)'

Aha, test2.cc is C++. MSVC uses different name mangling and calling
mechanisms, so the trash characters are decorated C++ functions.
MSVC++ code simply cannot be linked with G++ code, sorry.

Anders Norlander
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