drop support for GDB < 9
note: it still works on "pc ancient" RHEL7 and Debian 18.04 - as long as a recent enough version of GDB (hopefully 15) is installed next to / instead of the system-distributed GDB version.
note: it still works on "pc ancient" RHEL7 and Debian 18.04 - as long as a recent enough version of GDB (hopefully 15) is installed next to / instead of the system-distributed GDB version.