From:	Jason Green <news AT jgreen4 DOT fsnet DOT co DOT uk>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: template header files
Date:	Sun, 10 Sep 2000 11:45:22 +0100
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Sahab Yazdani <sahaby AT operamail DOT com> wrote:

> hello i have written my own linked list template file and now want to
> use it as a library (you know in different executables, etc). the
> problem is that for every time that I write:
> 
> LinkedList<foo> bob;
> 
> the linker returns "undefined reference to LinkedList<foo>" and refuses
> to actually compile the code.  i have included as attachment the header
> file for the linked list, the actual code and a short sample program
> using this library (which obviously doesn't work..)

The simplest way to use templates is to put the implementation of the
class template in the header file, not in a separate source file.  

In your case that means cut and paste everything from linkedlist.cc
into linkedlist.h, and delete linkedlink.cc.

Or, if you prefer, #include "linkedlist.cc" from linkedlist.h.

You do not compile linkedlist.cc so there is no linkedlist.o to link
with.

> thank you in advance for any help you may provide.
> 
> PS.  Sorry if this isn't a DJGPP specific question...

I believe this is a C++ FAQ.

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