Qt PostgreSQL linker error when trying to add database - postgresql

Question

I'm trying to set a connection to postgre database, but having linker errors.
.pro file:
QT -= gui
CONFIG += c++11 console
CONFIG -= app_bundle
CONFIG += sql
DEFINES += QT_DEPRECATED_WARNINGS
#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
unix|win32: LIBS += -L$$PWD/../../PostgreSQL/12/lib/ -llibpq
INCLUDEPATH += $$PWD/../../PostgreSQL/12/include
DEPENDPATH += $$PWD/../../PostgreSQL/12/include
win32:!win32-g++: PRE_TARGETDEPS += $$PWD/../../PostgreSQL/12/lib/libpq.lib
else:unix|win32-g++: PRE_TARGETDEPS += $$PWD/../../PostgreSQL/12/lib/liblibpq.a
.cpp file:
#include <QCoreApplication>
#include <QtSql/QSqlDatabase>
#include <QtSql/QSql>
#include <QtSql/QSqlDriver>
#include <QTextStream>
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QSqlDatabase mDB=QSqlDatabase::addDatabase("QPSQL");
return a.exec();
}
It's just that. I'm not even trying to connect yet.
Errors are:
main.obj:-1: error: LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl QSqlDatabase::~QSqlDatabase(void)" (__imp_??1QSqlDatabase##QEAA#XZ) referenced in function main
main.obj:-1: error: LNK2019: unresolved external symbol "__declspec(dllimport) public: static class QSqlDatabase __cdecl QSqlDatabase::addDatabase(class QString const &,class QString const &)" (__imp_?addDatabase#QSqlDatabase##SA?AV1#AEBVQString##0#Z) referenced in function main
main.obj:-1: error: LNK2001: unresolved external symbol "__declspec(dllimport) public: static char const * const QSqlDatabase::defaultConnection" (__imp_?defaultConnection#QSqlDatabase##2PEBDEB)
Postge is 64bit for Windows, compiler chosen for this application is also 64 MSVC2019 64bit. Please help.

Answer 1

Problem was in .pro file. It should be:
QT += sql
and not:
CONFIG += sql