Re: [ooc-compiler] DLL creation with oo2c?

[Stewart G. <sgr...@ii...>]

Hi Frank,

> 2 reasons why it would be nice to generate DLLs with oo2c:
>
> - Using oberon in larger projects even when others use other languages
> - Using oberon when the main program has to be in another language, 
> e.g. when it is created by a tool.

Agreed.

> Anything existing (working) or planned? My expert level: just managed 
> to  compile a dll-hello-world version with mingw following some 
> examples on the web :-) .

My understanding is that there is now some level of support for DLLs in 
libtool.
   http://www.belgeler.org/autobook/autobook-DLLs-with-Libtool.html

For the Windows DLL architecture, functions that are exported or 
imported from DLLs have to be specially declared using:
   __declspec(dllimport)
   __declspec(dllexport)
Normally, some preprocessor tricks are used so that a header file 
defining a module can be used for both import and export. The 
declaration is changed according to whether the compiled file is in the 
same or different DLL. It would need a little thought to determine what 
sort of model would work within oo2c. For Windows, we could add these 
tags into the compiler-generated declarations, but this would require 
the compiler to track which modules are grouped together in which 
libraries. I think it already does this, but I can't say for sure.

Cheers,
   Stewart