Error QApplication: no such file or directory

Question

I have installed C++SDK that have Qt but when I try compiling a code linking QApplication it gives me the error:

Error QApplication: no such file or directory
         


        

Answer 1

Please make sure that the version of qmake you are using corresponds to the version of QT you want to use.

To be sure, you can just run :

$qmake -v

Your problem seems to be a symptom of a version conflict between QT 3 and 4, as can be seen here :

http://lists.trolltech.com/qt4-preview-feedback/2005-11/thread00013-0.html

To fix this, you can either delete your old install of QT, or specifically point to qmake-qt4 in your Makefile.