LNK2005 error

[Taran]

Hi all,

I have this config.h file which has all the declarations for the vars
being used in the application. There are no compilation errors but link
errors for all the vars declared in this "iof_config .h" file.

//*************** *************** *************** *******
//FILE : iof_library.h
//*************** *************** *************** *******

#ifndef IOF_CONFIG_H
#define IOF_CONFIG_H 1

#include "iof_librar y.h"
// my own library for open, read and write to the queue,
// write to producer queue and read to consumer queue
#include "C_Q_Iterator_F IFO.h" // Q Iterators
#include "C_Q_Iterator_L astProduce.h"
#include "GeneralUtiliti es.h"
//*************** *************** *************** *************** ***/
// This data comes from the XML file
//Array of all the producers
// Where:
// Producer 0 = Altitude
// Producer 1 = Airspeed
// Producer 2 = Pressure
// Producer 3 = Temperature
//*************** *************** *************** *************** ***/
const int Produced_Items =4;
//*************** *************** *************** *************** ***/
// Array of all the consumers
// Where:
// Consumer 0 = Knots, FIFO read
// Consumer 1 = Degree Celcius, Last Produced read //Always reads the
last value i.e.from the tail
// Consumer 2 = Feet, FIFO read
// Consumer 3 = psi, LastProduced read
//*************** *************** *************** *************** ***/
const int Consumed_Items =4;

///*************** *************** *************** ***********
// C_Queue instantions for the Producers
//*************** *************** *************** ***********

//For Produced Item 1
C_Queue<Queue_E lement> altitude(9, "Altitude") ;

//For Produced Item 2
C_Queue<Queue_E lement> airspeed(5, "Airspeed") ;

//For Produced Item 3
C_Queue<Queue_E lement> pressure(12, "Pressure") ;

//For Produced Item 4
C_Queue<Queue_E lement> temperature(3, "Temperatur e");

//*************** *************** *************** ***********
// C_Q_Iterator instantions for the Consumers
//*************** *************** *************** ***********

//Consumed Item 1
C_Q_Iterator_FI FO<Queue_Elemen t> altitude_iterat or(&altitude, "Feet");

//Consumed Item 2
C_Q_Iterator_FI FO<Queue_Elemen t> airspeed_iterat or(&airspeed,"K nots");

//Consumed Item 3
C_Q_Iterator_La stProduce<Queue _Element>
pressure_iterat or(&pressure,"P SI");

//Consumed Item 4
C_Q_Iterator_La stProduce<Queue _Element>
temperature_ite rator(&temperat ure,"Degrees");
//*************** *************** *************** *************** ***/
//Producer and Consumer Arrays
//*************** *************** *************** *************** ***/
C_Queue<Queue_E lement>* Producer[Produced_Items];
C_Q_Iterator<Qu eue_Element>* Consumer[Consumed_Items];

//*************** *************** *************** *************** ***/
// Arrays for holding the unused indices in Producer and Consumer
arrays
// There can be max Produced(Consum ed)_Items number of unused indices.
//*************** *************** *************** *************** ***/
int empty_producer_ indices[Produced_Items];
int empty_consumer_ indices[Consumed_Items];

#endif

I am unable to understand that even though the file is inclusion
protected and there are only declarations why is this error.

Error message:

iof_library.obj : error LNK2005: "void __cdecl populate(void)"
(?populate@@YAX XZ) already defined in AppFile.obj
iof_library.obj : error LNK2005: "class C_Queue<struct Queue_Element> *
* Producer" (?Producer@@3PA PAV?$C_Queue@UQ ueue_Element@@@ @A) already
defined in AppFile.obj
iof_library.obj : error LNK2005: "class C_Queue<struct Queue_Element>
pressure" (?pressure@@3V? $C_Queue@UQueue _Element@@@@A) already defined
in AppFile.obj
iof_library.obj : error LNK2005: "class C_Queue<struct Queue_Element>
temperature" (?temperature@@ 3V?$C_Queue@UQu eue_Element@@@@ A) already
defined in AppFile.obj
iof_library.obj : error LNK2005: "class C_Q_Iterator<st ruct
Queue_Element> * * Consumer"
(?Consumer@@3PA PAV?$C_Q_Iterat or@UQueue_Eleme nt@@@@A) already defined
in AppFile.obj
iof_library.obj : error LNK2005: "int * empty_producer_ indices"
(?empty_produce r_indices@@3PAH A) already defined in AppFile.obj
iof_library.obj : error LNK2005: "class C_Q_Iterator_FI FO<struct
Queue_Element> altitude_iterat or"
(?altitude_iter ator@@3V?$C_Q_I terator_FIFO@UQ ueue_Element@@@ @A) already
defined in AppFile.obj
iof_library.obj : error LNK2005: "class C_Q_Iterator_La stProduce<struc t
Queue_Element> temperature_ite rator"
(?temperature_i terator@@3V?$C_ Q_Iterator_Last Produce@UQueue_ Element@@@@A)
already defined in AppFile.obj
iof_library.obj : error LNK2005: "int * empty_consumer_ indices"
(?empty_consume r_indices@@3PAH A) already defined in AppFile.obj
iof_library.obj : error LNK2005: "class C_Queue<struct Queue_Element>
altitude" (?altitude@@3V? $C_Queue@UQueue _Element@@@@A) already defined
in AppFile.obj
iof_library.obj : error LNK2005: "class C_Queue<struct Queue_Element>
airspeed" (?airspeed@@3V? $C_Queue@UQueue _Element@@@@A) already defined
in AppFile.obj
iof_library.obj : error LNK2005: "class C_Q_Iterator_FI FO<struct
Queue_Element> airspeed_iterat or"
(?airspeed_iter ator@@3V?$C_Q_I terator_FIFO@UQ ueue_Element@@@ @A) already
defined in AppFile.obj
iof_library.obj : error LNK2005: "class C_Q_Iterator_La stProduce<struc t
Queue_Element> pressure_iterat or"
(?pressure_iter ator@@3V?$C_Q_I terator_LastPro duce@UQueue_Ele ment@@@@A)
already defined in AppFile.obj
The file App.obj just incudes iof_library.h. The vars declared in this
iof_library.h are not declared anywhere else. And only the vars in this
file are causing this link error.

Am I missing something here?

I am using MVisual Studio 6.

Thanks in Advance.

[Daniel T.]

In article <11************ *********@u72g2 000cwu.googlegr oups.com>,
"Taran" <ta************ @gmail.com> wrote:

I am unable to understand that even though the file is inclusion
protected and there are only declarations why is this error.

Error message:

iof_library.obj : error LNK2005: "void __cdecl populate(void)"
(?populate@@YAX XZ) already defined in AppFile.obj
You aren't showing all the code. "populate() " isn't even *in* the header
you posted.

The simple answer is, contrary to your assertion, there are not "only
declarations" in one or more of your header files.

The header you posted has several definitions in it for example.
C_Queue<Queue_E lement>* Producer[Produced_Items];
C_Q_Iterator<Qu eue_Element>* Consumer[Consumed_Items];

int empty_producer_ indices[Produced_Items];
int empty_consumer_ indices[Consumed_Items];

All of the above are definitions and should not be in a header file that
is included in more than one source file.

[Renzr]

Just before, the error lnk2005 like
" EdgeH3.obj : error LNK2005: "public: virtual void __thiscall
EdgeH3::set_ord er(unsigned int,enum IAGEnums::Order ,bool)"
(?set_order@Edg eH3@@UAEXIW4Ord er@IAGEnums@@_N @Z) has defined in
BoundaryInfo.ob j
Element.obj : error LNK2005: "public: virtual void __thiscall
EdgeH3::set_ord er(unsigned int,enum IAGEnums::Order ,bool)"
(?set_order@Edg eH3@@UAEXIW4Ord er@IAGEnums@@_N @Z) has defined in
BoundaryInfo.ob j ."
has encountered to me,, goole the webside, some useful suggestiones
have not break in my mide. So, we search codes, and then, we find that
the "inline" has been lost before defing the inline member functions(
EdgeH3::set_ord er(unsigned int,enum IAGEnums::Order ,bool) ). at last,
my project can linked successfully after the lost " inline" words has
been added.
So, i think that maybe is the "inline" words lost before the inline
function in the header files.
Daniel T. wrote:

In article <11************ *********@u72g2 000cwu.googlegr oups.com>,
"Taran" <ta************ @gmail.com> wrote:

I am unable to understand that even though the file is inclusion
protected and there are only declarations why is this error.

Error message:

iof_library.obj : error LNK2005: "void __cdecl populate(void)"
(?populate@@YAX XZ) already defined in AppFile.obj

You aren't showing all the code. "populate() " isn't even *in* the header
you posted.

The simple answer is, contrary to your assertion, there are not "only
declarations" in one or more of your header files.

The header you posted has several definitions in it for example.

C_Queue<Queue_E lement>* Producer[Produced_Items];
C_Q_Iterator<Qu eue_Element>* Consumer[Consumed_Items];

int empty_producer_ indices[Produced_Items];
int empty_consumer_ indices[Consumed_Items];

All of the above are definitions and should not be in a header file that
is included in more than one source file.

[Default User]

Renzr wrote:

Just before, the error lnk2005 like

Please don't top-post. See item 4 of the FAQ entry below:

<http://www.parashift.c om/c++-faq-lite/how-to-post.html#faq-5.4>

Brian