[Solved] Remove linker error for a library that is not being used anymore

[Ghost]

I picked up some code related to implementing OAuth2 for Facebook. It uses QJson library to convert Facebook responses into JSON document (and then QVariantMap). However, as I am using Qt5, I decided to replace QJson with QJsonDocument.

After removing the references to QJson in the code, I also removed its reference from the LIBS attribute in project.pro file.

Here is the .pro file:

@##### Autogenerated starts here! ######

Add more folders to ship with the application, here

folder_01.source = qml/facebookauth
folder_01.target = qml
DEPLOYMENTFOLDERS = folder_01

Additional import path used to resolve QML modules in Creator's code model

QML_IMPORT_PATH =

The .cpp file which was generated for your project. Feel free to hack it.

SOURCES += main.cpp
oauth2authorizer.cpp
facebookmanager.cpp
facebookstatusdata.cpp

Please do not modify the following two lines. Required for deployment.

include(qmlapplicationviewer/qmlapplicationviewer.pri)
qtcAddDeployment()

Autogenerated ends here!

TARGET = facebookauth
TEMPLATE = app
QT += webkit network widgets

macx {
CONFIG -= app_bundle
QMAKE_POST_LINK += install_name_tool -change kqoauth.framework/Versions/0/kqoauth
../../lib/kqoauth.framework/Versions/0/kqoauth $${TARGET}
}
else:unix {

the second argument (after colon) is for

being able to run make check from the root source directory

LIBS += -L../../lib:lib
} else:windows {
LIBS += -L../../lib -lkqoauth0
}

LIBS += -Lqjson/lib -lqjson0

INCLUDEPATH += qjson/src

HEADERS +=
oauth2authorizer.h
facebookmanager.h
facebookstatusdata.h
@

However, compiling the project gives me the following error:

@:-1: error: LNK1104: cannot open file 'qjson0.lib'@

As per my understanding, compiler/linker shouldn't be bothered by that lib anymore as I have removed its reference from my project.

Can anyone guide me to a solution?

[mrdebug]

Have you run qmake?

[Ghost]

Well, I am using Qt Creator. I ran "clean" and then "rebuild". Is there anything more required?
I could go command line if you think it is required.

[Ghost]

[quote author="mrdebug" date="1374766280"]Have you run qmake?[/quote]

Alright. After you posted this, I thought of deleting the build folder of the project, and then rebuilding it. And it worked!

I had assumed that clean and rebuild should have done this for me.

Out of curiosity, what exactly do they do, if not cleaning up the non-existent library links?