Assuming ../ in your INCLUDEPATH refers to the top level directory of your project, then you can create a file like this (e.g. common.pri) in the top level directory

Qt Code: 
  1. INCLUDEPATH += $$dirname(_FILE_)
  2. LIBS #whatever you need
To copy to clipboard, switch view to plain text mode 

The all .pro files can simple include it. For example in your test

Qt Code: 
  1. include(../common.pri)
To copy to clipboard, switch view to plain text mode 

Cheers,
_