Search code examples
qtbuildqmake

qmake and QT_INSTALL_PREFIX. How can I select a new location for Qt library?

I am new to qmake and I am trying to build an existing application. Qt was originally installed in /usr/local/lib/Qt-4.3.5 and 'qmake -query QT_INSTALL_PREFIX' returns that path.

I have moved the Qt library to another location and the generated Makefiles are peppered with the /usr/local original path.

How can I force qmake to use the new location I selected without recompiling Qt?

Solution

  • This is a 'builtin' compiled into qmake from qconfig.cpp. The best way is to reconfigure Qt with another -prefix and rebuild unfortunately. For most other variables, you can use a .qmake.cache file. See

    http://doc.qt.digia.com/qt/qmake-environment-reference.html

    for more info