error includes ftd2xx library

[Blackzero]

I tried to include the ftd2xx file but there was an error when I tried to run it, this is the code from my qmake```
QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++17

SOURCES +=
main.cpp
mainwindow.cpp

HEADERS +=
ftd2xx.h
mainwindow.h

FORMS +=
mainwindow.ui

qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

and this is my mainwindow code```
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDebug>
#include <Windows.h>
#include "ftd2xx.h"
#include <stdio.h>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_pushButton_clicked()
{
    FT_HANDLE ftHandle;
    FT_STATUS ftStatus;
    ftStatus =  FT_Open(0,&ftHandle);
}

but when run there is this error```
:-1: error: debug/mainwindow.o: in function MainWindow::on_pushButton_clicked()': C:\Users\Blackzero\Documents\TestFTDI\mainwindow.cpp:25: error: undefined reference to __imp_FT_Open'
:-1: error: collect2.exe: error: ld returned 1 exit status
:-1: error: [Makefile.Debug:73: debug/Test.exe] Error 1

[jsulm]

@Blackzero You're not linking the library. See https://doc.qt.io/qt-6/qmake-variable-reference.html#libs

[Blackzero]

@jsulm the problem has been resolved, it turns out that the ftd2xx I used is not compatible with x64, so I just changed the ftd2xx x86 to ftd2xx x64.

[tbb7178]

@Blackzero said in error includes ftd2xx library:

he problem has been resolved, it turns out that the ftd2xx I used is not compatible with x64, so I just changed the ftd2xx x86 to ftd2xx x64.

Please help me, I am new to Qt platform and I am having same issue as yours. I Just want to know where you downloaded the ftd2xx x64 (.h and .lib) so that I can download to fix my problem. Thank you!

[SGaist]

@tbb7178 hi and welcome to devnet,

It's in the driver download page of ftdi.