If you have error of:
fatal error: wx/app.h: No such file or directory
You need to install wx-common, and also libwxgtk2.8-dev or libwxgtk3.0-dev.
$ sudo apt-get install wx-common
$ sudo apt-get install libwxgtk2.8-dev
$ sudo apt-get install libwxgtk3.0-dev
The videos show how to install and run, on Ubuntu Linux.
Next:
- Add Button to wxWidgets project