[solved][Mac OS X] Additional plugins for Qt (qca plugins)

goetz

You could add

@
qDebug() << qApp->libraryPaths();
@

to your main.cpp. There you can see, where your app searches for plugin folders. Put your crypto folder in one of that.

maciej

Thanks for your reply. It searches in /Developer/Application/Qt/plugins/. So it seems that it is problem with those .dylib files :/

goetz

I'll have a look into this later. Just need to finish my regular work ;-)

goetz

Can you tell us what exactly you did to install these libs, please. I don't know how to set up a test case for this, sorry.

The disk image only contains the dylibs. Where are the header files to include and the base QCA libs that are needed?

maciej

So, I've installed Qt 4.7.1 and QtCreator 2.0.1 from dmg files. Then I've installed QCA framework "from source":http://delta.affinix.com/download/qca/2.0/qca-2.0.3.tar.bz2"
@./configure
make
sudo make install@
I've checked if it works. After downloading qca-plugins I've created directory crypto in /Developer/Application/Qt/plugins/ and copied all dylibs there.

All header files are provided by qca, plugins provide only dylibs. For example these are contents of qca-ossl package installed on my Linux:
@
FILE LIST:
./
usr/
usr/doc/
usr/doc/qca-ossl-2.0.0_beta3/
usr/doc/qca-ossl-2.0.0_beta3/COPYING
usr/doc/qca-ossl-2.0.0_beta3/TODO
usr/doc/qca-ossl-2.0.0_beta3/README
usr/lib64/
usr/lib64/qt/
usr/lib64/qt/plugins/
usr/lib64/qt/plugins/crypto/
usr/lib64/qt/plugins/crypto/libqca-ossl.so.debug
usr/lib64/qt/plugins/crypto/libqca-ossl.so
install/
install/slack-desc
@

Example code:
in .pro file you should add:
@
CONFIG += crypto
@
main.cpp
@
#include <QtCore/QCoreApplication>
#include <QDebug>
#include <QtCrypto>

int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QCA::Initializer init;
qDebug() << QCA::supportedFeatures();
return a.exec();
}
@

goetz

I'll give it a try tonight or tomorrow, stay tuned.

goetz

I've tried it now. The pre built plugins cannot be loaded. I've tried to load them manually with "QPluginLoader":http://doc.qt.nokia.com/latest/qpluginloader.html, that fails too and states that the file libqca-logger.dylib is not a valid Qt plugin.

From how I interpret QPluginLoader's docs, the plugins need to be recompiled with your current Qt version.

maciej

I've found out that plugins configure problems can be solved by recreating configure file. It was created by tool called "QConf.":http://delta.affinix.com/qconf/ Problem is that QConf also has corrupted configure (same problem). I've informed developers about this situation and I hope it'll be fixed soon. "Thread about faulty configure.":http://lists.affinix.com/htdig.cgi/delta-affinix.com/2010-September/001736.html

maciej

I was adviced to try to run QConf's configure in that way:
@
QMAKESPEC=macx-g++ ./configure
@ If it does not work, version from svn should. Also new release of qca-ossl is planned soon, which should fix those issues.
I'll test it on Monday and update you with results.

maciej

adding
@
QMAKESPEC=macx-g++ ./configure
@ for qca-ossl solved the issue. You don't have to use QConf (as I stated in my previous post).