Conditonal Assembly in Nasm

From: Axel Schlicht (axel.schlicht_at_mail.isis.de)
Date: 05/26/04 

Date: Wed, 26 May 2004 17:57:43 +0000 (UTC)

Hi folks.

Does anybody know if nasm supports _OS-depending_ assembly like:

let's assume a C-program calls a function func.
Under Linux it will call func but under DOS it will call _func.
So it would be nice to map bot possibilities to one as in
        %if running_under_linux
          global func
        %else
          global _func
        %endif

        .... and later in the prog

        %if running_under_linux
          call func
        %else
          call _func
        %endif

or even

        %if running_under_linux
          define Func func
        %else
          define Func _func
        %endif

        ... and later in the program
        call Func

Would make using nasm under DOS (aka Windows 9x) and Linux much
easier.

So how can nasm determine which OS it is being used under and compile
correspondingly?
Thanks a lot for helping

Axel Schlicht

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