In the following test-case, the template function isn't instantiated (linker
complains with "Symbol Undefined ?f@@YAHH@Z (int cdecl f(int ))"):

  template<class T> int f(T a);

  int main(int argc, char *argv[])
  {
    int a = 0;
    return f(a);
  }

  template<class T> int f(T a)
  {
    return 0;
  }


and DM doesn't support explicit template instantiation, e.g.

  template<class T>
  struct A
  {
    void f()
    { }
  };

  template A<int>;


bye, Christof

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...and what have you contributed to the Net?

Christof Meerwald wrote:

> In the following test-case, the template function isn't instantiated (linker
> complains with "Symbol Undefined ?f@@YAHH@Z (int cdecl f(int ))"):
>
>   template<class T> int f(T a);
>
>   int main(int argc, char *argv[])
>   {
>     int a = 0;
>     return f(a);
>   }
>
>   template<class T> int f(T a)
>   {
>     return 0;
>   }
>
> and DM doesn't support explicit template instantiation, e.g.
>
>   template<class T>
>   struct A
>   {
>     void f()
>     { }
>   };
>
>   template A<int>;
>
> bye, Christof
>
> --
> http://cmeerw.cjb.net                          Jabber: cmeerw@jabber.at mailto cmeerw at web.de                   ICQ: 93773535, Yahoo!: cmeerw
>
> ...and what have you contributed to the Net?

You don't say what compiler options you used.  When I get messages like this I retry with -XD added.

John

Yes, -XD will make it work with the existing compiler, but I wanted to fix it so it worked automatically. -Walter

John Fletcher wrote in message <3BCBF5E9.83FE7752@aston.ac.uk>...
>
>
>Christof Meerwald wrote:
>
>> In the following test-case, the template function isn't instantiated
(linker
>> complains with "Symbol Undefined ?f@@YAHH@Z (int cdecl f(int ))"):
>>
>>   template<class T> int f(T a);
>>
>>   int main(int argc, char *argv[])
>>   {
>>     int a = 0;
>>     return f(a);
>>   }
>>
>>   template<class T> int f(T a)
>>   {
>>     return 0;
>>   }
>>
>> and DM doesn't support explicit template instantiation, e.g.
>>
>>   template<class T>
>>   struct A
>>   {
>>     void f()
>>     { }
>>   };
>>
>>   template A<int>;
>>
>> bye, Christof
>>
>> --
>> http://cmeerw.cjb.net                          Jabber: cmeerw@jabber.at mailto cmeerw at web.de                   ICQ: 93773535, Yahoo!: cmeerw
>>
>> ...and what have you contributed to the Net?
>
>You don't say what compiler options you used.  When I get messages like
this I
>retry with -XD added.
>
>John
>
>

On Tue, 16 Oct 2001 11:42:43 -0700, Walter wrote:
> Yes, -XD will make it work with the existing compiler, but I wanted to fix it so it worked automatically. -Walter

Thanks for fixing it.


>>> and DM doesn't support explicit template instantiation, e.g.

and the '-XI' command line option doesn't seem to work for class templates.

>>>   template<class T>
>>>   struct A
>>>   {
>>>     void f()
>>>     { }
>>>   };

If I compile it with 'sc -c -cod "-XIA<int>"' no code for the instantiation is generated.


bye, Christof

-- 
http://cmeerw.cjb.net                          Jabber: cmeerw@jabber.at mailto cmeerw at web.de                   ICQ: 93773535, Yahoo!: cmeerw

...and what have you contributed to the Net?

The XI is a holdover from the bad old days before comdat's. Do you need it?

"Christof Meerwald" <cmeerw@web.de> wrote in message news:9qi0v7$2gvh$1@digitaldaemon.com...
> On Tue, 16 Oct 2001 11:42:43 -0700, Walter wrote:
> > Yes, -XD will make it work with the existing compiler, but I wanted to
fix
> > it so it worked automatically. -Walter
>
> Thanks for fixing it.
>
>
> >>> and DM doesn't support explicit template instantiation, e.g.
>
> and the '-XI' command line option doesn't seem to work for class
templates.
>
> >>>   template<class T>
> >>>   struct A
> >>>   {
> >>>     void f()
> >>>     { }
> >>>   };
>
> If I compile it with 'sc -c -cod "-XIA<int>"' no code for the
instantiation
> is generated.
>
>
> bye, Christof
>
> --
> http://cmeerw.cjb.net                          Jabber: cmeerw@jabber.at mailto cmeerw at web.de                   ICQ: 93773535, Yahoo!: cmeerw
>
> ...and what have you contributed to the Net?

On Tue, 16 Oct 2001 15:12:08 -0700, Walter wrote:
> The XI is a holdover from the bad old days before comdat's. Do you need it?

I would prefer the standard C++ explicit template instantiation. STLport's I/O stream library makes heavy use of it (I was just looking for an alternative).


bye, Christof

-- 
http://cmeerw.cjb.net                          Jabber: cmeerw@jabber.at mailto cmeerw at web.de                   ICQ: 93773535, Yahoo!: cmeerw

...and what have you contributed to the Net?