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I am using Ubuntu 14.04.2 LTS on an x86_64 cpu. I try to create a Makefile using qmake with the flag QT += Qt3Support, but I get the answer "Project ERROR: Unknown module(s) in QT: Qt3Support"

I tried to uninstall and reinstall the package libQt3Support.so.4, but I keep getting the same error. The module is installed in /usr/lib/x86_64-linux-gnu/.

Is it a linking error or a 64/32 bit problem or else?

/Staffan

Staffan Rydblom
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  • The name is case-sensitive, I think: it needs to be qt3support. Also, you may need to use qmake-qt4 explicitly i.e. qmake-qt4 "QT += qt3support". – steeldriver Aug 06 '15 at 12:06
  • Thank you! The qmake-qt4 command was the trick. And it should also be lower-case letter as you wrote. – Staffan Rydblom Aug 10 '15 at 07:26

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