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Here is the trick: If you are using the provided Qt SDK binaries then you have to change the build key to "qnx". If you are manully compiling Qt for Playbook then automatically "blackberry" is used as key. This mechanism is used by Qt to "guarantee" compatibility of plugins.
Sorry, I open this thread again. Since I've couple apps written for symbian and I wanted it to be ported. Can someone post a sample of a .pro file. I've one which works well but I'm finding that all qt libraries are included/packaged to the compiled .bar file and the size is bloated above 100mb, the application itself in symbian is about 20mb. Appreciate for any help.
You have to include the Qt libraries to get it working with the current Playbook OS (with OS 10 there will be cascades which is more or less the same as Qml). You can reduce the size by copying only the required Qt libraries (e.g. by trial and error) into a separate directory and link to this directory from the project xml file.
build the libraries in release mode and then strip them (with e.g. arm-unknown-nto-qnx8.0.0-strip)
Don't include the symlinked version in the BAR file, as it doesn't support symlinks and will copy the file three times. I.e. instead of having libQtCore.so.4.8.0, libQtCore.so.4 and libQtCore.so, only have one of them (can't remember which is the correct one right now)
