title: Howto use QCA(http://delta.affinix.com/qca/) with Qt4.7 (Qt Creator)?
body: <p>I want to use the QCA Library with QT4.7 and QTCreator as IDE.<br>
  I downloaded the "qca-2.0.2-mingw" Version and try to link them in my ".Pro"-file:</p>
  
  <pre><code>QT       += core
  QT       -= gui
  LIBS += -L"\qca-2.0.2-mingw\lib\"
  LIBS += -lqca2
  
  CONFIG *= qt
  CONFIG   += console
  CONFIG   -= app_bundle
  
  INCLUDEPATH += "\qca-2.0.2-mingw\include\QtCrypto"
  INCLUDEPATH += "\qca-2.0.2-mingw\bin"
  
  TARGET = untitled1
  
  TEMPLATE = app
  
  LINKAGE = -lqca
  CONFIG(debug, debug|release) {
      windows:LINKAGE = -lqcad
      mac:LINKAGE = -lqca_debug
  }
  LIBS += $$LINKAGE
  
  SOURCES += main.cpp
  </code></pre>
  
  <p>it compiles but when I run a HMAC sample, copied from this location, <a href="http://delta.affinix.com/docs/qca/mactest_8cpp-example.html#_a6" rel="nofollow">http://delta.affinix.com/docs/qca/mactest_8cpp-example.html#_a6</a> </p>
  
  <p>the application stuck with the following error:<br>
  <strong>Starting C:\Qt\2010.04\qt\untitled1\release\untitled1.exe...
  C:\Qt\2010.04\qt\untitled1\release\untitled1.exe exited with code -1073741515</strong></p>
  
  <p>Commenting out some lines doesn't bring the effect. Even the first line of the HMAX Example, will lead to the results described above "QCA::Initializer init;"<br>
  I've tried the "qca-2.0.0-mingw" also, but the same effect occurres. </p>
  
  <p>Greets and Thanks first,<br>
  Marco</p>