Binary package “qtbase5-dev” in ubuntu eoan

Qt 5 base development files

 Qt is a cross-platform C++ application framework. Qt's primary feature
 is its rich set of widgets that provide standard GUI functionality.
 .
 This package contains the header development files used for building Qt 5
 applications.
 .
 If you are interested in packaging Qt 5 stuff please take a look at
 https://qt-kde-team.pages.debian.net/packagingqtbasedstuff.html