Calc::Calc(QObject *parent) : QObject(parent){ qDebug() << "parent: " << parent; <...>
win32: LIBS += -L$$PWD/../../dll/calc/build-Calc-Desktop_Qt_5_5_0_MSVC2012_32bit-Release/release/ -lCalc#win32: LIBS += -L$$PWD/../../dll/calc/build-Calc-Desktop_Qt_5_5_0_MSVC2012_32bit-Debug/debug/ -lCalc
C++ (Qt)#define qApp QCoreApplication::instance()