Installation and getting started with first app

giesbert

You install the SDK for linux and build the executables there. Same procedure....

Or you get a creoss compile environment, install it on windows, build for linux and copy, but I think, native building will be easier.

KennedyDayala

where can i get a cross compiler for QT and how can i make it for Linux? please help !!

giesbert

I never cross compiled from windows to linux.
Did you ask google?

KennedyDayala

If the customer is aiming at application which can be installed and executed on both Windows and Linux, how would we do that using our QT ?

can you please guide me in a detailed manner Gerolf ??

giesbert

I would build natively on windows and natively on linux. Especially as Linux != Linux (distribution).
Use a seperate machine, virtual machines whatever and build on both.

KennedyDayala

lemme know if my understandings are correct…

develop the application on one OS using QT (windows or Linux).
Get the .exe file in Release mode on native OS (say Windows).
Run the same code on the other desired OS (say Linux which can be the other OS of my Dual OS system and has the same SDK) and get the .exe in release mode.
make an installable setup (write a script which can pick up the required ‘files and .exe’ by recognizing the OS during installation) which is installed and executed according to the customer specifications.
make the customer satisfied :-)

…..i am right Gerolf ??

giesbert

Yep, thats the way to go.
If you use a version control system or some shared drives, you could also switch during developement (which never is bad for testing if everything really works).

KennedyDayala

million thanks Gerolf..please be with me while learning the coding..

KennedyDayala

Hello Gerolf,

got a problem again..

have downloaded the Qt SDK 1.1 Beta for Linux. Tried installing it and ended up with this error..

./Qt_SDK_Lin64_offline_v1_1_beta_en.run: /usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.9' not found (required by ./Qt_SDK_Lin64_offline_v1_1_beta_en.run) :-((

could you please help me in sorting this ?!

giesbert

I don't use Linux, I always use windows, sorry.

vinb

try to install libstdc++.
Question: which distro do you use? And do you have g++ installed already?

KennedyDayala

thanks for the response man..i am totally new to Linux..could you please lemme know how to fetch those info you asked ??

andre

If you're on linux, you should already have that lib I'd say.

KennedyDayala

I have installed CentOS 5.5 yesterday and tried to install Qt..could you please gimme those commands to check if that lib is existing and its verson ??

andre

For linux help, you're on the wrong channel. Sorry. This is not Qt related anymore.

KennedyDayala

I agree..but it happened while i tried to install Qt on Linux...help is appreciated more

vinb

http://wiki.centos.org/HowTos#head-70ff04f00f6b441f231663b09d7716f4f771a436

KennedyDayala

thanks amn..I will go through that link now..

btw I have this compiler error when I compiled my demo app on windows using QTreeView which I am planning to display the SystemStorage info

In file included from ..\IDT_Demo_UI\main.cpp:2:
..\IDT_Demo_UI/idt_mainwindow.h:23: error: ISO C++ forbids declaration of 'QSystemStorageInfo' with no type
..\IDT_Demo_UI/idt_mainwindow.h:23: error: expected ';' before '*' token

vinb

its say were you have to look!
ĺine 23 of the file idt_mainwindow.h, you didnt end the line with ; or/and you didnt include QSystemStorageInfo

giesbert

Or you only declared the type like
@
class QSystemStorageInfo;
@
and use it as member. This is not allowed. If you use it for pointers, declaration like above should work.