Using DMD 0.97:

I have the following code in interface.d:

interface Map {
  bool equals(Object o);
  int size();
}

abstract class AbstractMap : Map {
  int size() { return 0;}
  abstract bool equals(Object o);
}

abstract class HashMap : AbstractMap {
  bool equals(Object o) { return true; }
}

and I get the following:

C:\usr\local\src\d>dmd interface.d
c:\usr\local\dmd\bin\..\..\dm\bin\link.exe interface,,,user32+kernel32/noi;
OPTLINK (R) for Win32  Release 7.50B1
Copyright (C) Digital Mars 1989 - 2001  All Rights Reserved

OPTLINK : Warning 23: No Stack
interface.obj(interface)
 Error 42: Symbol Undefined _D9invariant12_d_invariantFC6ObjectZv
interface.obj(interface)
 Error 42: Symbol Undefined _D6object6Object8opEqualsFC6ObjectZi
interface.obj(interface)
 Error 42: Symbol Undefined _D6object6Object5opCmpFC6ObjectZi
interface.obj(interface)
 Error 42: Symbol Undefined _D6object6Object6toHashFZk
interface.obj(interface)
 Error 42: Symbol Undefined _D6object6Object8toStringFZAa
interface.obj(interface)
 Error 42: Symbol Undefined _D6object6Object5printFZv
interface.obj(interface)
 Error 42: Symbol Undefined __vtbl_9ClassInfo
interface.obj(interface)
 Error 42: Symbol Undefined __Class_6Object
OPTLINK : Warning 134: No Start Address
--- errorlevel 8


Thanks,
Scott Sanders

stonecobra wrote:

> Using DMD 0.97:
> 
> I have the following code in interface.d:
> 
> interface Map {
>    bool equals(Object o);
>    int size();
> }
> 
> abstract class AbstractMap : Map {
>    int size() { return 0;}
>    abstract bool equals(Object o);
> }
> 
> abstract class HashMap : AbstractMap {
>    bool equals(Object o) { return true; }
> }
> 
> and I get the following:
> 
> C:\usr\local\src\d>dmd interface.d
> c:\usr\local\dmd\bin\..\..\dm\bin\link.exe
> interface,,,user32+kernel32/noi;
> OPTLINK (R) for Win32  Release 7.50B1
> Copyright (C) Digital Mars 1989 - 2001  All Rights Reserved
> 
> OPTLINK : Warning 23: No Stack
> interface.obj(interface)
>   Error 42: Symbol Undefined _D9invariant12_d_invariantFC6ObjectZv
> interface.obj(interface)
>   Error 42: Symbol Undefined _D6object6Object8opEqualsFC6ObjectZi
> interface.obj(interface)
>   Error 42: Symbol Undefined _D6object6Object5opCmpFC6ObjectZi
> interface.obj(interface)
>   Error 42: Symbol Undefined _D6object6Object6toHashFZk
> interface.obj(interface)
>   Error 42: Symbol Undefined _D6object6Object8toStringFZAa
> interface.obj(interface)
>   Error 42: Symbol Undefined _D6object6Object5printFZv
> interface.obj(interface)
>   Error 42: Symbol Undefined __vtbl_9ClassInfo
> interface.obj(interface)
>   Error 42: Symbol Undefined __Class_6Object
> OPTLINK : Warning 134: No Start Address
> --- errorlevel 8
> 
> 
> Thanks,
> Scott Sanders

try adding a main. something like
 int main(){return 0;}
either that or compile with the -c flag.

Ben Hinkle wrote:
> 
> 
> try adding a main. something like
>  int main(){return 0;}
> either that or compile with the -c flag.

Thanks Ben.

Scott