Need help installing Qwt

[Computer Hater]

Try to change the Qwt sources place (..maybe on desktop?), clean all the past installation tries (AFAIK just delete the C:\Qwt-... directory) and then try to rebuild/install using 'mingw32-make' command.

I did. And it worked ! I didn't see any error messages this time, just a few warnings.

At the end of the install procedure, you should find inside the C:\Qwt.. directory the compiled libreries (.a and .dll), the headers, and the QT designer plugin.

Hope this may helps.

Indeed, the files are there. It sure did help. Thank you so much !

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A few more questions:

1.)
The INSTALL file then says:

Don't forget to tell qmake where to find qwt.prf:
qmake -set QMAKEFEATURES ...

I took this to mean:
Type qmake -set QMAKEFEATURES qwt.prf
*after* the installation in *any* folder inside the shell.
I did that and the shell neither showed any error nor success message, so I guess it worked ?

2.) About using Qwt...
I checked the section about adding new features.

It says I have to add the feature file to the CONFIG environment variable. I currently don't have CONFIG in my environment variables (as listed in Qt Creator's Projects menu). I have CONFIGSETROOT. Is that the one or do I have to add CONFIG separately ?