qmake set install directory

Question

I'm trying to build Qwt to a custom location. The obvious thing to try is a PREFIX option, but it had no effect and the make install still failed:

$ qmake qwt.pro PREFIX='/my/path'
$ make
$ make install
mkdir: cannot create directory `/usr/local/qwt-5.2.3': Permission denied

There seem to be numerous other questions and answers to this question, which also have no effect and fail:

• How to change qmake PREFIX location: qmake -set prefix '/my/path'
• How can the install path be set for a qt project: make; INSTALL_ROOT=/my/path; make install

Any other suggestions?

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QMake version 2.01a
Using Qt version 4.5.3 in /opt/Qt4/4.5.2/qtsdk-2009.04/qt/lib
RHEL 5.10

Answer 1

Try to edit the qwtconfig.pri file in the source directory, it has the installation path hardcoded for different platforms, as well as many other options you might want to change.