Install latest Qt to Ubuntu

  1. sudo mkdir opt/Qt         (notice Q has to be uppercase)
  2. Download open source Qt run file from official site
  3. execute .run file
  4. install at opt/Qt

Have more than 1 versions of qt?

sudo update-alternatives –install /usr/bin/qmake qmake /opt/Qt/ 10

Repeat for each version but with a different number.

To select which version to use as default, run:

sudo update-alternatives –config qmake

references:

http://jpnurmi.kapsi.fi/blog/2008/03/16/how-to-switch-qt-version-in-ubuntu/

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