Ok, so I'm having some problems linking the library into my project for QT creator Windows.

Here is the contents of my .pro file:

# Project created by QtCreator 2014-08-04T09:44:21

QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = usb_hid_api

SOURCES += main.cpp\

HEADERS += mainwindow.h\

FORMS += mainwindow.ui

CONFIG += console

unix|win32: LIBS += -L$$PWD/../libusb_win/MinGW64/static/ -lusb-1.0

INCLUDEPATH += $$PWD/../libusb_win/include/libusbx-1.0
DEPENDPATH += $$PWD/../libusb_win/include/libusbx-1.0

I get as a result of my problems:
undefined reference to 'libusb_error_name@4' line 16
undefined reference to 'libusb_init@4' line 32
(basically a bunch of undefined references).

Can someone tell me where I'm going wrong?