Shows how to create a clock with Fl_Clock widget.
To build this project, open "Terminal" and type following lines:
mkdir build && cd build
cmake ..
start Clock.sln
Select Clock project and type Ctrl+F5 to build and run it.
mkdir build && cd build
cmake .. -G "Xcode"
open ./Clock.xcodeproj
Select Clock project and type Cmd+R to build and run it.
mkdir build && cd build
cmake ..
cmake --build . --config Debug
./Clock