Debugging with gdb

[SteM]

Thanks!
Yes, this works but again i don't have the symbols.

If i type 'file executable' the gdb kills the current session and loads the symbols (but when i will be in remote environment??) but the gdbserver exits
If i re-run the server gdb shows me the source correctly.
Is there a way to avoid all this operations on them and launch a complete debugging session?

If i should be in a real remote debugging session, the gdb have to see the executable loaded on the target? So, both of them have to see the executable?

Thanks a lot!

[SteM]

I'm trying to debug using Eclipse environment.
This seems to be good, the environment switch to Debug prespective, i can view the source code but when run the line:
QApplication app(argc, argv);
the application exits with the messages in the console view:

seashell: cannot connect to X server 
 
Child exited with retcode = 1 
 
Child exited with status 1
GDBserver exiting
logout

seashell: cannot connect to X server 

Child exited with retcode = 1 

Child exited with status 1
GDBserver exiting
logout

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How can i debug a graphical QT aplication with gdb/gdbserver?
Do i need some extra settings?

Thanks again !!

[jacek]

Yes, this works but again i don't have the symbols.

If i type 'file executable' the gdb kills the current session and loads the symbols (but when i will be in remote environment??) but the gdbserver exits

Did you pass the path to the executable as a parameter when you started gdb? Like this:

gdb ./seadragonshellapp
(gdb) target remote :2345
(gdb) cont

You can also try:

gdb
(gdb) file ./seadragonshellapp
(gdb) target remote :2345
(gdb) cont

seashell: cannot connect to X server

I've never tried to debug a C++ application in Eclipse, but maybe it's a matter of invoking xhost with proper parameter? Maybe there's something in the logs?