ouais mais voilà quand meme mon fichier .pro :
#-------------------------------------------------
#
# Project created by QtCreator 2017-09-30T21:16:40
#
#-------------------------------------------------
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = Learning
TEMPLATE = app
# The following define makes your compiler emit warnings if you use
# any feature of Qt which has been marked as 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 you use 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
CONFIG(release, debug|release): LIBS += -lsfml-audio -lsfml-graphics -lsfml-window -lsfml-network -lsfml-system
CONFIG(debug, debug|release): LIBS += -lsfml-audio-d -lsfml-graphics-d -lsfml-window-d -lsfml-network-d -lsfml-system-d
SOURCES += \
main.cpp \
QSFMLCanvas.cpp
HEADERS += \
QSFMLCanvas.h