QGiS Windows Source Build

abhishek999

@JonB
Apologies for the confusion. I’ve deleted the previous post and will keep my questions in one place from now on.

I successfully included the library, but when I try to display the map in Qt, I encounter the following error (see screenshot). Any suggestions on how to resolve this issue?
Screenshot 2.jpeg

jsulm

@abhishek999 You're not linking properly one of the required libs. Please show your pro file (as text).

abhishek999

@jsulm


QT += core gui widgets xml

CONFIG += c++17

# QGIS include directory
INCLUDEPATH += C:/OSGeo4W/apps/qgis-ltr/include
INCLUDEPATH += C:/OSGeo4W/apps/qgis/bin
INCLUDEPATH += C:/OSGeo4W/apps/Qt5/bin
INCLUDEPATH += C:/OSGeo4W/apps/qgis-ltr/include/qgis
INCLUDEPATH += C:/OSGeo4W/share/proj/proj.db

# QGIS library directory with required libraries
LIBS += -LC:/OSGeo4W/apps/qgis-ltr/lib -lqgis_core -lqgis_gui -lqgis_analysis -lqgis_3d -lqgis_native

SOURCES += \
    main.cpp \
    mainwindow.cpp

HEADERS += \
    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

jsulm

@abhishek999 What exact Qt version did you use to build QGIS? Is it the same you're using to build the application?

abhishek999

@jsulm i am using qt 5.15.2

jsulm

@abhishek999 You did not answer the second question.

abhishek999

@jsulm
qt version 5.15.2
qgis version QGIS 3.34.12

pro file

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++17
# QGIS include directory

# QGIS include directory
INCLUDEPATH += C:/OSGeo4W/include
INCLUDEPATH += C:/OSGeo4W/apps/qgis-ltr-dev/include
INCLUDEPATH += C:/Qt/5.15.0/msvc2019_64/include/QtXml

# QGIS library directory with required libraries
LIBS += -LC:/OSGeo4W/apps/qgis-ltr-dev/lib -lqgis_core -lqgis_gui -lqgis_analysis -lqgis_3d -lqgis_native



# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    main.cpp \



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

main.cpp file
Screenshot (16).png

jsulm

@abhishek999 This also does not answer my question.
Again: did you use same Qt version to build QGIS as you use to build your app?

And why do you have this in your pro file:

INCLUDEPATH += C:/Qt/5.15.0/msvc2019_64/include/QtXml

There is no need to add Qt include folders to the include path, you just have to enable the Qt modules you want to use in "QT +="

Pl45m4

@abhishek999

You say you are using Qt 5.15.2 but your include path says Qt 5.15.0? Which one is correct?

And post code as text, don't post images please.

abhishek999

i reinstall qt and my version Qt 5.15.0 now.
@jsulm i did not understand can you please tell me wich version i have to use if i am using Qt 5.15.0 and along with download link.

jsulm

@abhishek999 said in QGiS Windows Source Build:

can you please tell me wich version i have to use if i am using Qt 5.15.0

Use same Qt version to build QGIS and your app...

Pl45m4

@abhishek999 said in QGiS Windows Source Build:

i did not understand can you please tell me wich version i have to use if i am using Qt 5.15.0 and along with download link.

It doesn't matter which version exactly, as long as it works... The important thing is that you use the same to build QGIS and your programs.