specifying object code (/additional libraries) to be linked -- where?

[planetLars]

Hello,

I get "undefined reference to ..." linker errors.

My definitions reside in a cpp file which do get compiled to object code.

If I put the definitions inside the header file, the link process is without errors.

Thus I guess that the link process inside QtCreator forgets to link the object code it created from my cpp files.

Where do I specify the files to be linked?

Or is this a different problem?

Please help!

Thanks

Lars

[planetLars]

btw. here's the implementation:

#include "Y.h"
 
template<class X> Y<X>::~Y()
{
	delete Something;
}

#include "Y.h"

template<class X> Y<X>::~Y()
{
	delete Something;
}

To copy to clipboard, switch view to plain text mode 

It's defined in Y.cpp.

If I put this code inside the header file Y.h, there are no problems. If I leave the code here, I get

release/Z.o:Z.cpp::-1: error: undefined reference to `Y<_mytype>::~Y()'

release/Z.o:Z.cpp::-1: error: undefined reference to `Y<_mytype>::~Y()'

To copy to clipboard, switch view to plain text mode 

. Z.cpp includes Y.h.

[planetLars]

see http://www.linuxforums.org/forum/lin...ce-errors.html.

Template classes must be declared and defined in one file, ie. putting implementation in cpp doesn't work as the specific type to be used in the template is unknown on compile time thus the compiler can't generate code for the implementation (having the implementation included in the file which is included in the code where the template is instantiated makes the type in the template known.)