Qt usage

Introduction

In Firefly-PX3-SE, the buildroot system currently supports three
versions of Qt:

Qt4.8.7

Qt5.6.2

Qt5.9.1

Among the above versions, the default supported Qt version is Qt5.9.1.
Please note that the compiling of  Qt5.9.1 requires the host compiler
tool GCC and G++ version to be 4.8 and above. Therefore, if the GCC
and G++ version in the current compiling environment is lower than
4.8, please update them first before compiling.

Qt development environment configuration

Please install Qt5.9.1 first and configure the cross-compiling
environment for Qt. Since you can directly use the tools compiled via
Buildroot, you don't need recompile the Qt source code again.

Install Qt

Go to

Qt Offccial Download Page

 and download Qt5.9.1. Once downloaded successfully, please install it
directly.

Configure "Qt versions"

You can add 'qmake' in "Projects" --> "Manage Kits..." -->" Build &
Run" --> "Qt Versions" :

Using "qmake" compiled directly using Buildroot:

"buildroot/output/host/bin/qmake"


Configure "Compiler"

You can add the C and C++ compilers in "Projects" --> "Manage Kits..."
--> "Build & Run" --> "ompilers" , that come with the SDK:

GCC:

 "buildroot/output/host/usr/bin/arm-rockchip-linux-gnueabihf-gcc"

C++:

 "buildroot/output/host/usr/bin/arm-rockchip-linux-gnueabihf-g++"


Configure "Devices"

You can add PX3SE devices in "Projects" --> "Manage Kits..." -->
"Devices", and it requires the IP address, username and password of
the development board. If there is no password for "root", you need to
add it via "passwd root". In order to developing and testing easily,
we recommend you configure the development board as static IP address.


Qt remote debugging

Firefly-PX3-SE supports Qt remote debugging. The device IP address,
username and password mentioned above are prepared for remote
debugging.

Configure “Debugger"

Please ensure that the ".config" of buildroot has the following
configuration:

       BR2_PACKAGE_HOST_GDB_PYTHON
       BR2_PACKAGE_HOST_GDB
       BR2_PACKAGE_GDB
       BR2_PACKAGE_GDB_SERVER 


Configure “Build PX3 Kits”

Add kits and configure devices, compiler, debugger and Qt versions in
“Projects”-》“Manage Kits...”-》“Build & Run”-》“Kits”.


Configure Running

Activate PX3 kits in "Projects" --> "Build & Run".


As shown in the following screenshot, select the corresponding kit and
press "Ctrl+R" to start remote running.


If you want to reopen the application, you need to close the running
application manually. In the following "Application Output" window,
you can click the "Stop Running Program" to stop the running of the
application.


Configure debugging

Configure the debugger in "Debug" --> "Start Debugging" --> "Attach to
Running Debug Server...":


Select the corresponding kits and press F5 key to start remote
debugging.