How to use FTD2xx library on QtCreator (with MSVC2012 compiler) - c++

Question

I have trouble in making an application which communicates FTDI devices via D2xx driver.There is some example project for Visual Studio in ftdi's website. But there isn't for QtCreator. I chose QtCreator as c++ IDE because my application needs Qt framework.
I put ftd2xx.h and ftd2xx.lib in the Qt project directory.
(ftd2xx.lib is static library, which were originally located in [download-folder]\CDM v2.08.30 for Windows 8.1\Static\i386)
When sample source code was compiled, I got following error message.
Error message when I use .pro file(1).
LNK1104: cannot open file 'ftd2xx.lib'
Error message when I use .pro file(2).
error: Assignment needs exactly one word on the left hand side.
How should I correct Qt project setup in order to utilizes ftd2xx library?
My source code and .pro file is here.
[main.cpp]
#include <QCoreApplication>
#include <windows.h>
#include "ftd2xx.h"
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
FT_HANDLE ftHandle;
FT_STATUS ftStatus;
ftStatus = FT_Open(0,&ftHandle);
return a.exec();
}
[.pro file if the checkbox is enabled] ---(1)
#-------------------------------------------------
#
# Project created by QtCreator 2014-02-11T18:51:08
#
#-------------------------------------------------
QT += core
QT -= gui
TARGET = D2XXtest
CONFIG += console
CONFIG -= app_bundle
TEMPLATE = app
SOURCES += main.cpp
HEADERS += ftd2xx.h
win32:CONFIG(release, debug|release): LIBS += -L$$PWD/ -lftd2xx
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/ -lftd2xxd
INCLUDEPATH += $$PWD/
DEPENDPATH += $$PWD/
win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/libftd2xx.a
else:win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/libftd2xxd.a
else:win32:!win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/ftd2xx.lib
else:win32:!win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/ftd2xxd.lib
[.pro file if the checkbox is NOT enabled] ---(2)
#-------------------------------------------------
#
# Project created by QtCreator 2014-02-11T18:51:08
#
#-------------------------------------------------
QT += core
QT -= gui
TARGET = D2XXtest
CONFIG += console
CONFIG -= app_bundle
TEMPLATE = app
SOURCES += main.cpp
HEADERS += ftd2xx.h
win32: LIBS += -L$$PWD/ -lftd2xx
INCLUDEPATH += $$PWD/
DEPENDPATH += $$PWD/
win32:!win32-g++ PRE_TARGETDEPS += $$PWD/ftd2xx.lib
else:win32-g++: PRE_TARGETDEPS += $$PWD/libftd2xx.a
Any help would be appreciated. Thanks in advance.
[Note]
OS: Windows 8.1
IDE: Qt Creator 3.0.0
Compiler: MSVC2012(32bit)
Target device: ft232hl
[Additional Note]
The configuration of "Add Library" is following.
If I enable the checkbox "Add "d" suffix for debug version, then I got error message about LNK1104. Otherwise, I got different error message.

Answer 1

My hunch is that you've made a typo in your error message, and the real error message reads as follows:
LNK1104: cannot open file 'ftd2xxd.lib'
See that d there? It doesn't belong, there's no ftd2xxd.lib. You need to change any references to ftd2xxd.lib back to ftd2xx.lib, re-run qmake, and you should be all set. Otherwise your .pro file seems correct.
After your edit, you gave a .pro file with the "checkbox enabled". That's certainly not true, since the contents you show imply that the checkbox is disabled, not enabled.
Anyway, we don't care what the dialog box settings are. Just show the actual .pro file that you really use, because so far I don't know which one you do use, and I don't know if you've re-run qmake after the .pro file was changed.
Are you sure that the ftd2xx.lib file is actually in the same folder where the .pro file is?