REt: Creating DLLs using c++/g++

Danny Smith danny_r_smith_2001@yahoo.co.nz
Tue Apr 2 13:56:00 GMT 2002


> From: Suhanthan Vanniyasingam <Suhanthan at eRunway dot com>

> I have created DLLs by using the following command
>	"gcc -Wl,--out-implib,libmydll.import.a -shared -o mydll.dll
> mydll.o"
> and used with a VC++ application.

> But I have tried the same command with c++ and g++. It's creating the
DLL.
> But the functionality is not accessible by VC++ application.

Its not a dll problem, its a difference in C++ ABI. You can't generally mix
object code from different C++ compilers. In fact different versions of
same compiler (say G++-2.x and G++-3.x) produce incompatable C++ code.
Different compilers use different name-mangling schemes to protect users
from problems that arise when mixing ABI's. 

There are attempts to standardize C++ ABI across compilers, but that has
not happened yet.  

Danny

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