I sent an answer already. Got lost somehow.
Anyhow, the reason for this behavior is, that a static member is not just a
type definition, it is actually a real memory area. Therefor you have to
create a real variable therefore. I personally dont like that behavior, but
I think it was the only possible solution for C++. Again the reason is it
belongs to the class rather then to one of the objects.
What you have to add this to _one_ of the .cpp files:
int A::a;
or
int A::a=0;
if you want to initialize it
----- Original Message -----
From: "Evan Harvey" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, May 23, 2001 10:48 AM
Subject: [rtl] RTLinux: C++ static members != good ?
> I have modified the hello.cpp example that came with RTLinux. I moved
class
> A to a.h and then moved class B declarations to b.h and implementation to
> b.cpp.
>
> I can compile and run the modules no problem.
>
> my problem comes when I try to make
> int a; //from class A
> static int a;
>
> when I load the module I get an error like
>
> error in b.o : unresolved symbol _1A.a
>
> Any clue why this is? Can I not use static members with RTLinux? What is
> an alternative to static?
>
> Thank you for your help.
>
> -Evan
> [EMAIL PROTECTED]
>
> _________________________________________________________________
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