Hi,
I'm trying to compile Gwenview (but this also happened while trying to
compile other programs) and when launching ./configure I get this
error:

checking for KDE... configure: error:
in the prefix, you've chosen, are no KDE headers installed. This will fail.
So, check this please and use another prefix!

The command "kde-config --prefix" outputs "/opt/kde3", so I've also tried with:
./configure --prefix=/opt/kde3

but the error came out the same.

I've installed:
kdelibs4-kde3-dev
kdebase-kde3-dev

and other dev packages but still I get the error.
Any suggestions?
Thanks
Luca