[SOLVED] Can't add custom class!

[bareil76]

Hi all,
I cannot find why I get this error:

@hid_pnp.obj:-1: error: LNK2001: unresolved external symbol "public: bool __thiscall CHexManager::LoadHexFile(void)" (?LoadHexFile@CHexManager@@QAE_NXZ)@

Here is my CHexManager class header
@#ifndef HEX_H
#define HEX_H

#pragma once
#include "stdio.h"
#include <QObject>

typedef struct
{
unsigned char RecDataLen;
unsigned int Address;
unsigned int MaxAddress;
unsigned int MinAddress;
unsigned char RecType;
unsigned char* Data;
unsigned char CheckSum;
unsigned int ExtSegAddress;
unsigned int ExtLinAddress;
}T_HEX_RECORD;

// Hex Manager class
class CHexManager
{

public:
unsigned int HexTotalLines;
unsigned int HexCurrLineNo;
bool LoadHexFile(void);
--
//Constructor
CHexManager()
{
HexFilePtr = NULL;
}
//Destructor
~CHexManager()
{
// If hex file is open close it.
if(HexFilePtr)
{
fclose(HexFilePtr);
}
}

private:
QString HexFilePath;
FILE *HexFilePtr;

};

#endif // HEX_H
@

and source

@
#include "hex.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = FILE;
#endif

// Virtual Flash.
#define KB (1024)
#define MB (KB*KB)

// 5 MB flash
static unsigned char VirtualFlash[5*MB];

#define BOOT_SECTOR_BEGIN 0x7FC000

#define DATA_RECORD 0
#define END_OF_FILE_RECORD 1
#define EXT_SEG_ADRS_RECORD 2
#define EXT_LIN_ADRS_RECORD 4

/****************************************************************************

• Loads hex file

• \param

• \param

• \param

• \return true if hex file loads successfully
  *****************************************************************************/
  bool CHexManager::LoadHexFile(void)
  {
  char HexRec[255];

  HexFilePath = fileDialog.GetPathName();

  // Open file
  HexFilePtr = fopen(HexFilePath, "r");

  if(HexFilePtr == NULL)
  {
  // Failed to open hex file.
  return false;
  }
  else
  {

   HexTotalLines = 0;
   while(!feof(HexFilePtr))
   {
       fgets(HexRec, sizeof(HexRec), HexFilePtr);
       HexTotalLines++;
   }
  

  }

  return true;
  }
  @

In my MainWindow.h file I have declared in the public section:
@ CHexManager HexManager; //load Hex manager class@

and in my MainWindow.c file.. if I try to run @HexManager.LoadHexFile();@

I get the error.

What am I doing wrong??

[Buckets]

I think I had the issue you are having before.
I ended up removing my build folder, cleaned the project, then rebuilt it and the linkage error went away.

[dbzhang800]

Have you added the hex.cpp file to your project?

[bareil76]

Yes.. hex.cpp is in the project tree.

[SGaist]

Hi,

In the project tree doesn't mean it gets compiled. Do you list in the sources in your pro file ?

[bareil76]

yes.. it was listed.

[SGaist]

Can you show your pro file ?

[bareil76]

@#-------------------------------------------------

Project created by QtCreator 2012-09-04T13:47:46

#-------------------------------------------------
QT += gui declarative
QT += core gui
#DEFINES +=QT_DISABLE_DEPRECATED_BEFORE=0x040800 #0x050100 to disable functions deprecated in Qt 5.1 and earlier
greaterThan(QT_MAJOR_VERSION, 4): QT += printsupport

TARGET = MyApp
TEMPLATE = app

SOURCES += main.cpp
mainwindow.cpp
hid_pnp.cpp
qcustomplot.cpp
windows/hid.c
hex.cpp

HEADERS += mainwindow.h
hid_pnp.h
qcustomplot.h
hidapi.h
hex.h

FORMS += mainwindow.ui

#-------------------------------------------------

Add the Signal11's hidapi library that was

created

#-------------------------------------------------
macx: LIBS += -L../HIDAPI/mac -lHIDAPI
#win32: LIBS += -L../HIDAPI/windows -lHIDAPI
unix: !macx: LIBS += -L../HIDAPI/linux -lHIDAPI

#-------------------------------------------------

Make sure to add the required libraries or

frameoworks for the hidapi to work depending on

what OS is being used

#-------------------------------------------------
macx: LIBS += -framework CoreFoundation -framework IOkit
win32: LIBS += -lSetupAPI
unix: !macx: LIBS += -lusb-1.0

#-------------------------------------------------

Make sure output directory for object file and

executable is in the correct subdirectory

#-------------------------------------------------
macx {
DESTDIR = mac
OBJECTS_DIR = mac
MOC_DIR = mac
UI_DIR = mac
RCC_DIR = mac
}
unix: !macx {
DESTDIR = linux
OBJECTS_DIR = linux
MOC_DIR = linux
UI_DIR = linux
RCC_DIR = linux
}
win32 {
DESTDIR = windows
OBJECTS_DIR = windows
MOC_DIR = windows
UI_DIR = windows
RCC_DIR = windows
}

@

[bareil76]

I tried again.. and got the same error.

[SGaist]

Did you delete the build directory and do a full rebuild ?

[bareil76]

I just tried and no it doesn't work.

It should be so simple!

[SGaist]

Are all your files in the same folder ?

[bareil76]

Yes.. they are.

Thank you for your help by the way!

[SGaist]

Are you also calling this function in hid_pnp ?

[bareil76]

In hid_pnp.. I setup an instance of the class by using

CHexManager HexManager;

so calling HexManager.LoadHexFile(); in hid_pnp... will produce the error.

[SGaist]

Then let's go step by step, comment all call to that function and build again, once it does, re-add them one by one.

[bareil76]

THANK YOU!!!!

I got it... I don,t know why I did this. But I had included #include "hid_pnp.h" in my hex.c file.

Going to the strict minimum was a good idea.

[SGaist]

You're welcome !

Since you have it working now, don't forget to update the thread title prepending [solved] so other forum users may know a solution has been found :)