Qt5.15 Download -

Ubuntu 20.04 LTS has Qt 5.15.2 in its official repos:

// main.cpp #include <QApplication> #include <QLabel> int main(int argc, char *argv[]) QApplication app(argc, argv); QLabel label("Hello Qt 5.15!"); label.show(); return app.exec(); qt5.15 download

git clone https://code.qt.io/qt/qt5.git cd qt5 git checkout 5.15 perl init-repository Ubuntu 20

mkdir build && cd build ../configure -prefix /path/to/install -opensource -confirm-license -nomake tests make -j$(nproc) make install If you don't want to deal with Qt accounts or installers, use your system's package manager. Note: These may not be the exact 5.15.2 but close patch versions. int main(int argc