libqrencode undefined reference error

tiamat

Hi guys, this is my first time posting here, I need some help with generating QR code using fukuchi qrencode library, I'm using QT 5.14 on Windows and I followed the instructions on this website to generate and implement the library

https://www.programmerall.com/article/9877982530/

However, when I tried to run the sample program, it gives me an undefined reference error on QRcode_encodeString and QRcode_free

Can you guys help me?

jsulm

@tiamat Please post the pro file. Undefined reference means that the lib is either not found or is incompatible.

tiamat

Here's my .pro file

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11

# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    main.cpp \
    mainwindow.cpp

HEADERS += \
    libqrencode/qrencode.h \
    mainwindow.h

FORMS += \
    mainwindow.ui

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

win32: LIBS += -L$$PWD/libqrencode/ -llibqrencode

INCLUDEPATH += $$PWD/libqrencode
DEPENDPATH += $$PWD/libqrencode

win32:!win32-g++: PRE_TARGETDEPS += $$PWD/libqrencode/qrencode.lib
else:win32-g++: PRE_TARGETDEPS += $$PWD/libqrencode/libqrencode.a

tiamat

@jsulm they did mention this undefined reference error in the reference part, but they don't provide any solutions to it, I've tried linking the static library using the -L -l format but to no avail

tiamat

Nevermind, I solved it, I forgot to define the config as staticlib while building the qrencode library