After installing the qt-sdk package in Linux Mint 17 (Trusty) I was disappointed to discover that Qt Creator wouldn't open due to the fact that my CPU, an Athlon XP, had no sse2 instruction set. Most of the sdk was Qt4: Assistant, Designer and Linguist all worked fine. After playing about a little here's the quick and dirty solution I used to get an earlier version of Qt Creator working on my system.
So if you've downloaded qt-sdk from the trusty (or later) repository and find that all is well (Qt Designer, Qt Assistant and Qt Linguist all open) except that Qt Creator doesn't open (giving the “illegal instruction” message when run from a terminal) chances are your system has a CPU without the sse2 instruction set; the version of Qt Creator in the trusty repository is compiled to use sse2.
This happened to me on my old AthlonXP system.
Now, if you want a working version of Qt Creator to use with the trusty version of the qt-sdk here's a quick and dirty way to fenagle it.
Download the qtcreator_2.4.1-0ubuntu10_i386.deb from http://packages.ubuntu.com
(For i386 use: http://packages.ubuntu.com/precise/i386 ... r/download
and download its associated help file:
(For i386 use: http://packages.ubuntu.com/precise/all/ ... c/download
Create a writeable directory somewhere for files in the packages above. I decided to put the files in my home directory, e.g.,
Use the archive manager on your system to extract the usr directory inside the qtcreator_2.4.1-0ubuntu10_i386.deb package to the qtcreator2.4.1 directory, or whatever you called it, mentioned above. Do the same with the file qtcreator.qch file inside the folder /usr/share/qtcreator/doc in the qtcreator-doc_2.4.1-0ubuntu2_all.deb file.
Create a launcher on your desktop, or menu, to the executable file qtcreator in the bin directory inside the directory you previously extracted the qtcreator_2.4.1-0ubuntu10_i386.deb package files. In the example I've given this would be the /home/<username>/qtcreator2.4.1/usr/bin directory.
(The icon for the launcher can be selected from /home/<username>/qtcreator2.4.1usr/share/icons)
You should now be able to execute Qt Creator by double-clicking the launcher you kust created. In order to use the appropriate helpfile you need to register the file using Qt Creator via Tools->Help->Documentation->Add then browse to and select the qtcreator.qch which you extracted above.
All done and dusted! You now have a working version of Qt Creator 2.4.1!
To complete the installation install the qt4-demos package from Synaptic and you will be able to browse all of the Qt demos and examples while inside Qt Creator, which is great for learning.