You’re well ahead of me at this point. After a segfault with the old binary I tried to re-build from old source, which would take some time to configure properly. Perhaps I’ll download the version with gtk2 support and try again later.
I’ve read about people configuring Eclipse to flash via serial. I assume it calls a shell script… I’m not aware of any gdb server with serial flash support but that doesn’t mean it doesn’t exist.