I have setup QT according to your manual. Works OK.
I want to use QT creator, I defined a kit for my board using your provided compiler
I installed gdbserver on my board.

Compiling OK.
When I set the debugger to your toolset gdb i get the message
"The selected build of GDB does not support Python scripting."

Using another gdb (arm-cortex_a9-linux-gnueabihf-linaro_4.9/bin/arm-cortex_a9-linux-gnueabihf-gdb )
deploying to target ok,
I get the debugger message "mesg: ttyname failed: Inappropriate ioctl for device"
and a segmentation error;
The target itself is ok, i can run it from the commandline.
How to fix this?