From kde-buildsystem  Wed Nov 07 19:19:37 2007
From: Christian Ehrlicher <Ch.Ehrlicher () gmx ! de>
Date: Wed, 07 Nov 2007 19:19:37 +0000
To: kde-buildsystem
Subject: Problem with Qt4 and release mode on windows
Message-Id: <47320FC9.5020900 () gmx ! de>
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Hi,

when I compile a qt plugin in release mode (and therefore link against
release qt lib) I've the problem that cmake does not set -DQT_NO_DEBUG .
Because of this Qt assumes we're compiling this plugin in debug mode:

qconfig.h:
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
#if !defined(QT_NO_DEBUG) && !defined(QT_DEBUG)
#  define QT_DEBUG
#endif

which leads to the wrong Q_PLUGIN_VERIFICATION_DATA:

qplugin.h:
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
#  ifdef QT_NO_DEBUG
#    define QPLUGIN_DEBUG_STR "false"
#  else
#    define QPLUGIN_DEBUG_STR "true"
#  endif
#  define Q_PLUGIN_VERIFICATION_DATA \
    static const char *qt_plugin_verification_data =3D \
      "pattern=3D""QT_PLUGIN_VERIFICATION_DATA""\n" \
      "version=3D"QT_VERSION_STR"\n" \
      "debug=3D"QPLUGIN_DEBUG_STR"\n" \
      "buildkey=3D"QT_BUILD_KEY"\0";


--> an app does not load this plugin because the verification data does
not match.

I'm posting this to cmake and kde-buildsystem list because I don't know
who to blame here - qt because it's not recognizing the NDEBUG flag
(which seems to be a widely used flag) or cmake because it's not adding
QT_NO_DEBUG to the compiler flags.



Christian


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