Strange linking behaviour

Filimon Roukoutakis

Dear all,

I have a MyClass.h file with declarations and MyClass.cxx file with
definitions. From this I create a library libMyLib.a, containing
properly the MyClass.o object. When I try to link with MyExec.o,
containing the main function, I get an undefined reference for a MyClass
member function which can be eliminated if I move the definition from
the MyClass.cpp file to the MyClass.h file. What could be the cause of
this? Thanks,

filimon

Feb 3 '07 #1

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1145

gw7rib

On 3 Feb, 16:17, Filimon Roukoutakis <fili...@phys.uoa.grwrote:

Dear all,

I have a MyClass.h file with declarations and MyClass.cxx file with
definitions. From this I create a library libMyLib.a, containing
properly the MyClass.o object. When I try to link with MyExec.o,
containing the main function, I get an undefined reference for a MyClass
member function which can be eliminated if I move the definition from
the MyClass.cpp file to the MyClass.h file. What could be the cause of
this? Thanks,

filimon

Does it matter where in the .h file you move it to? I'm thinking
perhaps in one file you have it within a class, or a namespace, or an
extern "C", or the like, and when you move it you don't. Otherwise, I
think you are going to have to post some code - just whittle it down
to the the smallest length of file that goes wrong.

Paul.

Feb 3 '07 #2

Filimon Roukoutakis

Hi, the problem was related to KDevelop make configuration for building
libraries, it is fixed now. Thanks,

filimon

gw****@aol.com wrote:

On 3 Feb, 16:17, Filimon Roukoutakis <fili...@phys.uoa.grwrote:
>Dear all,

I have a MyClass.h file with declarations and MyClass.cxx file with
definitions. From this I create a library libMyLib.a, containing
properly the MyClass.o object. When I try to link with MyExec.o,
containing the main function, I get an undefined reference for a MyClass
member function which can be eliminated if I move the definition from
the MyClass.cpp file to the MyClass.h file. What could be the cause of
this? Thanks,

filimon

Does it matter where in the .h file you move it to? I'm thinking
perhaps in one file you have it within a class, or a namespace, or an
extern "C", or the like, and when you move it you don't. Otherwise, I
think you are going to have to post some code - just whittle it down
to the the smallest length of file that goes wrong.

Paul.

Feb 3 '07 #3

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