[Qt-creator] Remote debugging armv5te using Qt Creator

[Christian Kandeler]

On Thursday 25 February 2010 16:01:38 ext gmenant.ext at orange-ftgroup.com 
wrote:

> I'm using Qt Creator 1.3.1.
> About the sysroot, I don't know what I have to put in it (which path). It's
>  probably my main problem though ! GDB is looking for libQtGui.so.4 in
>  /usr/lib and the file is there (see below). I don't understand why he
>  doesn't find it...

Gdb needs to find the libraries from the target device on the host as well, to 
display debug information. I assume the Qt libs it finds in /usr/lib are the 
x86 versions. You have to tell gdb where on your PC to find the set of target 
libraries. The easiest way to do that is to put a copy of the device OS' file 
system tree on the host system (only libraries and perhaps header files are 
needed) and point the sysroot variable to the respective directory.
Example:
    - You copy the relevant files from your device to the directory 
/usr/share/cross on your PC, preserving the directory structure.
    - Now you have directories such as /usr/share/cross/lib, 
/usr/share/cross/usr/lib, /usr/share/cross/usr/include etc.
    - Then you set gdb's sysroot variable to /usr/share/cross
    - gdb should now pick up the right libraries

>> Which commands do you send to gdb when manually debugging?> 
> 
> Nothing for now but Qt Creator sends a lot of commands and I don't know why
>  and how to configure them.

Well, it must get the right sysroot from somewhere. Perhaps it has been set up 
with the correct sysroot at configure time? You can check that by starting gdb 
and typing "show sysroot".

>>> 2 - What is the purpose of gdb startup file and gdbserver startup file ?
>>> What is the syntax ?
> 
>> It's an sh script intended for doing preparations on the server side, like
>> copying your program or starting gdbserver. See the email you referenced
>>  above for an example.
> 
> Ok, I will try it when other points will be ok. Even with a embedded linux
>  on my target, I will be able to copy and lanch gdbserver automatically ?

Yes, scp/ssh can do that.


Christian