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Message-ID: <3CECC567.30100@uni.de>
Date: Thu, 23 May 2002 12:33:11 +0200
From: Dennis Jarosch <ya_luva AT uni DOT de>
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To: cygwin AT cygwin DOT com
Subject: linking cygwin built dll with Borland C++Builder
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Hi!!

I have successfully built a .dll with cygwin (c-Files, using the 
mingw-compiler) and converted it to a .lib using Borland's implib.

Using the .lib in my Borland C++Builder 5 project is no problem at all, 
however there seem to be alignment problems between the gcc .dll/.lib 
and the Borland code. :-(

The problem is that I have created a C++ wrapper to the c-dll and I am 
exchanging data with structs. I have a malloced mem-space containing 
structs and as I iterate through it, the struct-data gets mixed up. What 
I am saysing is that only the first element is correct. I have been able 
to (dirty hack) solve this problem by casting to char* and incrementing 
by 4 byte * iteration, because this is what is lost in every iteration.

Also, when I try to free the allocated mem-space I sometimes get 
exceptions, which I suspect is due to the different interpretation of 
the structs in memory!

I have tried the -fnative-struct switch in gcc, as well as many other 
flags. I have also played with Borland's alignment (byte... quad word).

Has anyone made similar experiences, or does anybody have any hints on 
how to correct these problems?

Please help! ;-)

Thanks!

Dennis

PS: I am not subscribed to the list


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