Hello Erich,
Thanks to you, I could solve this problem. There was another gdb in my PATH variable. Everything worked.
But when I started the application this morning again, I had another problem. The error message reads as follows
Error in final launch sequence
Failed to execute MI command:
-exec-run
Error message from debugger back end:
Error creating process C:/Users/brunner-beo/workspace.kds/Testskd/Debug/Testskd.elf, (error 193).
Error creating process C:/Users/brunner-beo/workspace.kds/Testskd/Debug/Testskd.elf, (error 193).
Maybe you can help me again.