Galil and Qt on Windows 7

[Tobster]

Hi there,

I am trying to create a simple application to connect to a Galil controller and followed their install instructions (http://www.galilmc.com/sw/pub/all/doc/gclib/html/windows.html).

However, it appears that it cannot find the functions provided by the library (e.g. GClose() used below in the cpp code). The error message is "undefined reference to `GClose@4' ."

Is there an issue with my .pro file (shown below)?

Thank you!!

Details:

I started using the serial port terminal example from Qt and added the following .h file:

#ifndef GRIFFIN_H
#define GRIFFIN_H

#include "gclib.h"
#include "gclibo.h"
#include "gclib_errors.h"
#include "gclib_record.h"

class Griffin
{

private:
GCon *m_g;
GCStringIn m_IP_ADDR = "10.63.32.65";
int m_SPEED = 20;

public:
Griffin();
~Griffin();
int connect();
};

#endif // GRIFFIN_H

The corresponding .cpp file is:

#include "griffin.h"
#include <iomanip>
#include <iostream>

Griffin::Griffin()
{
m_g = new GCon;
}

Griffin::~Griffin()
{
GClose(m_g);
delete m_g;
}

int Griffin::connect()
{
//GCStringIn openParams(" -d -t 10000");
//std::cout << openParams << std::endl;
//GOpen();
return(0);
}

I copied to .dll .lib and .h files to a local directory and edited the .pro file as follows:

QT += widgets serialport

TARGET = terminal
TEMPLATE = app

SOURCES +=
main.cpp
mainwindow.cpp
settingsdialog.cpp
console.cpp
griffin.cpp

HEADERS +=
mainwindow.h
settingsdialog.h
console.h
griffin.h

FORMS +=
mainwindow.ui
settingsdialog.ui

RESOURCES +=
terminal.qrc

target.path = $$[QT_INSTALL_EXAMPLES]/serialport/terminal
INSTALLS += target

LIBS += "C:/Magnetic_tracking/NDI/Code/terminal/GalilLibrary/gclib.lib"
LIBS += "C:/Magnetic_tracking/NDI/Code/terminal/GalilLibrary/gclibo.lib"

INCLUDEPATH += "C:/Magnetic_tracking/NDI/Code/terminal/GalilLibrary/"
DEPENDPATH += "C:/Magnetic_tracking/NDI/Code/terminal/GalilLibrary/"
QT += widgets serialport

TARGET = terminal
TEMPLATE = app

SOURCES +=
main.cpp
mainwindow.cpp
settingsdialog.cpp
console.cpp
griffin.cpp

HEADERS +=
mainwindow.h
settingsdialog.h
console.h
griffin.h

FORMS +=
mainwindow.ui
settingsdialog.ui

RESOURCES +=
terminal.qrc

target.path = $$[QT_INSTALL_EXAMPLES]/serialport/terminal
INSTALLS += target

LIBS += "C:/Magnetic_tracking/NDI/Code/terminal/GalilLibrary/gclib.lib"
LIBS += "C:/Magnetic_tracking/NDI/Code/terminal/GalilLibrary/gclibo.lib"

INCLUDEPATH += "C:/Magnetic_tracking/NDI/Code/terminal/GalilLibrary/"
DEPENDPATH += "C:/Magnetic_tracking/NDI/Code/terminal/GalilLibrary/"

[Tobster]

To add:

in gclib.h it says:

//set library visibility for gcc and msvc
#if BUILDING_GCLIB && HAVE_VISIBILITY
#define GCLIB_DLL_EXPORTED attribute((visibility("default")))
#elif BUILDING_GCLIB && defined _MSC_VER
#define GCLIB_DLL_EXPORTED __declspec(dllexport)
#elif defined _MSC_VER
#define GCLIB_DLL_EXPORTED __declspec(dllimport)
#else
#define GCLIB_DLL_EXPORTED
#endif

and

//! Closes a connection to a Galil Controller.
GCLIB_DLL_EXPORTED GReturn GCALL GClose(GCon g);

[SGaist]

Hi and welcome to devnet,

Which exact version of Qt are you using to build your application ?

[Tobster]

@SGaist
Hi, thank you!

Qt Creator 4.0.2
Based on Qt 5.7.0 (MSVC 2013, 32 bit)

[SGaist]

That's the Qt Creator version, what Qt version are you using ?

[Tobster]

@SGaist
It's 5.7.0
From the build settings:
Desktop Qt 5.7.0 MinGW 32bit

[Tobster]

@SGaist
DependencyWalker identified issues with a bunch of DLL dependencies (API-MS-WIN-CORE_WINRT- ...).

This led me to this thread:

https://stackoverflow.com/questions/17023419/win-7-64-bit-dll-problems

This issue may not be related to Qt after all but rather be caused by a missing Visual studio "redistributable package."

[SGaist]

With which compiler is your version of Galil compiled ?

[Tobster]

@SGaist
I believe I found the issue:

Galil's installer placed the *.dll in a different path than the *.lib files:

..\gclib\dll\x86

versus

..\gclib\lib\dynamic\x86

When I copied the *.dll files to the same folder as the *.lib files, the problem went away.