Version of Qt library

[Dmitry Nadezhin]

Qt interface was developed with latest Qt version qt-x11-free-3.0.1 . It was
tested also with qt-2.3.1 and qt-2.2.4 , though some features are
disabled with qt-2 . It was not tested with qt-2.0.2 .

Versions of runtime qt package and development qt package must be the same. I
suppose that libqt2-dev package version 1:2.0.2-1.1 contains header files
from qt-2.0.2 and compilation of Electric fails.

I recommend to get sources of latest qt release and
compile qt from sources:

http://www.trolltech.com/developer/download/qt-x11.html

  -Dmitry Nadezhin

> I didn't get it working. Maybe I have wrong version of Qt library (I'm
> using Debian Woody package libqt2 version 3:2.3.1-19 and libqt2-dev version
> 1:2.0.2-1.1). I think different versions of Qt are not compatible, so one
> probably should mention which version of Qt is required (I couldn't find
> that info). [Then again I could advocate that there's much less version
> incompatibilities with Motif :)]
> 
> Here are the error messages I got:
>
> gcc -O2 -DUSEQT -I/usr/lib/qt2/include   -Isrc/include -DFORCELISP=1
> -Isrc/elk   -DFORCEIRSIMTOOL    -DUSETIF -DANYDEPTH  -I/usr/lib/qt2/include
> -c src/graph/graphqt.cpp -o src/graph/graphqt.o
> src/graph/graphqt.cpp: In method `EApplication::EApplication(int &, char
> **)':
> /usr/lib/qt2/include/qfontdatabase.h:57: `QFontDatabase::QFontDatabase()'
> is private
> src/graph/graphqt.cpp:830: within this context