QT and qTopia versions

Hi all

I'm a bit confused over what to compile/install to get the latest version
of QT. After installing the updates (from the News forum, update
2010-11-21), and using the linux-image, what version of QT do I actually
have installed ?

The reason I ask is because I put

             fprintf(stderr, "QT version: %s\n", qVersion());

into my code, and it prints out 'QT version 2.3.12'. I thought I'd be
getting 4.6 or there-abouts.


Similarly, for my cross-compiler, I was using arm-qtopia-20101105.tar.gz
and x86-qtopia-20100420.tar.gz. Ought I be using the x86-qte-... and
arm-qte-... instead ?

Cheers,
  Simon

Simon,

Check here for info:
http://lists.trolltech.com/qt-interest/2003-09/thread00073-0.html

The path to $QTDIR/include/qglobal.h will vary depending on which
environment variables you have set up.  When I am compiling my environment
variableS point QTDIR as follows:
X11:
/opt/FriendlyARM/mini2440/x86-qtopia/qtopia-2.2.0-FriendlyARM/dqt.  

ARM: 
/opt/FriendlyARM/mini2440/arm-qtopia/qtopia-2.2.0-FriendlyARM/qt2.  

In the qtopia-2.2.0-FriendlyARM directory there are several subdirectories.
 Among them are dqt and qt2.  If I open the qglobal.h file in the
../include subdirectory for each path I get the following results:
...dqt/include/qglobal.h: #define QT_VERSION_STR   "3.3.5"
...qt2/include/qglobal.h: #define QT_VERSION_STR   "2.3.12"

If I enter "$ which qmake" for either environment I get the following:
For x11 (x86):
/opt/FriendlyARM/mini2440/x86-qtopia/qtopia-2.2.0-FriendlyARM/qtopia/bin/qmake
For arm: 
/opt/FriendlyARM/mini2440/arm-qtopia/qtopia-2.2.0-FriendlyARM/qtopia/bin/qmake

But for either one "$ qmake -v" returns:
Qmake version: 1.06c-Qtopia (Qt 3.2.1)

So now I have three different qt versions on my machine just from the
FriendlyARM download and install: 2.3.12, 3.2.1, and 3.3.5.

If I open a Makefile from a project for either platform I get the
following:
For ARM:
MOC      =
/opt/FriendlyARM/mini2440/arm-qtopia/qtopia-2.2.0-FriendlyARM/qt2/bin/moc
UIC      =
/opt/FriendlyARM/mini2440/arm-qtopia/qtopia-2.2.0-FriendlyARM/qt2/bin/uic

For X11:
MOC      = $(QTDIR)/bin/moc
UIC      = $(QTDIR)/bin/uic
Where QTDIR =
/opt/FriendlyARM/mini2440/x86-qtopia/qtopia-2.2.0-FriendlyARM/dqt

What this tells me is that, for the default environment variable settings,
if you compile for X11 you will get QT version 3.3.5, but if you compile
for the ARM you will get QT version 2.3.12.  They must have grabbed qmake
from QT version 3.2.1, but the qmake version AFAIK doesn't determine your
final compile version.  It's the libraries that are called in during the
compile that counts.

One more thing. The arm-qtopia path also has a dqt directory.  This would
imply that you can compile ARM projects with QT 3.2.1 also.  I haven't
tried pointing my QTDIR to this path yet, but I am looking into doing this
soon.
 
Hope this helps.

James

Thanks James,

I sort of figured it out by browsing enough websites, and now I'm running
with QT 4.7 on the 7" LCD. I've been making a log of what I'm doing at
http://tank-log.com/ if anyone is interested :)

Simon