title: qt, library -like project, and include <>
body: <p>In Qt, I want to have a separate library-like project (not .lib, simple .cpp/.h files, but in separate project). Lets call it "library". Project which will include it call "test".
  To achieve this, in "library" project I create .pri file, instead of .pro. And from this moment I have the following file struct:</p>
  
  <pre><code>/library
     library.pri
     calc.h
     calc.cpp
  /test
     test.pro
     main.cpp
  </code></pre>
  
  <p>The containment of library.pri is the following:</p>
  
  <pre><code>SOURCES += calc.cpp     
  HEADERS += calc.h 
  </code></pre>
  
  <p>test.pro:</p>
  
  <pre><code>TEMPLATE = app
  CONFIG += console
  CONFIG -= app_bundle
  CONFIG -= qt
  
  #include(../library/library.pri)
  
  SOURCES += main.cpp
  </code></pre>
  
  <p>Now I want to include calc.h . But I don't want to specify relative dir, i.e.:</p>
  
  <p><code>#include "../library/calc.h"</code>, I want : <code>#include &lt;calc&gt;</code></p>
  
  <p>How to do that?</p>