prefix=/opt/the firstlib

Name: TheFirstLib
Description: TheFirstLib
Version: 1.0
URL: http://www.example.com/thefirstlib
Cflags: -DTheFirstLib -I"${prefix}/include" -DHAVE_INDUSTRIAL_STRENGTH_HAIR_DRYER -I/otherdir/include1 -I/otherdir/include2
Libs: -L"${prefix}/lib" -lTheFirstLib
Requires: Qt5Core
Requires.private: SomeHelper