Minimal Qt5 devenv setup in Linux

qt.txt

# TODO: find the minimal package.
apt install qt5-default qtcreator 

# Steps to create Qt app.
# 1. create main.cpp
# 2. create .pro file
# 3. create Makefile from .pro file
# 4. run make


# create a main.cpp
cat > main.cpp <<<EOF
#include <QtCore>
#include <iostream>

int main() {

    std::cout << "Qt version: " << qVersion() << std::endl;
}
EOF

# Create the project file "qt.pro"
qmake -project

# Create "Makefile"
qmake qt.pro

# add following line in the qt.pro file.  Any reasonable qt app projects need this.
QT += widgets

# make
# it runs
# g++ -Wl,-O1 -o qt version.o   -lQt5Gui -lQt5Core -lGL -lpthread

# run the app
./qt


# For embedded Linux without X11 see https://doc.qt.io/qt-5/embedded-linux.html