Atmel AVR 8-bit RISC microcontrollers GNU gdb
GDB, the GNU Project debugger, allows you to see what is going on
`inside' another program while it executes -- or what another program
was doing at the moment it crashed.

Maintainer: The OpenBSD ports mailing-list <ports@openbsd.org>

WWW: https://www.gnu.org/software/gdb/gdb.html
