GUD debugger says: Undefined command: "-interpreter-exec"

Question

I am following the tutorial Open GDB (within Emacs for added functionality) on Emacs 25.2.1 with Evil Spacemacs and Ivy (the commands gud-gdb and gdb get the same results):

SPC f f (counsel-find-file) Find file: tutorial/foo.c
SPC c C (compile) Compile command: gcc -g -o foo foo.c
SPC SPC M-x gud-gdb foo (match required)
SPC SPC M-x gud-gdb
Run gud-gdb (like this): gud-gdb foo

Here are the screen shots:

What does "like this" mean?

It opens GUD interaction buffer *gud-avg*. avg is the name of a previous program I was trying to debug.

Update: the GUD interaction buffer now opens to *gud-foo*.

Here are the screen shot:

Any how, the GUD interaction buffer did open, but it's broken:

(gdb) list
Undefined command: "-interpreter-exec".  Try "help".
(gdb) help
Undefined command: "-interpreter-exec".  Try "help".

Answer 1

Open file and compile:

SPC f f (counsel-find-file) Find file: tutorial/foo.c
SPC c C (compile) Compile command: gcc -g -o foo foo.c

There are several debuggers that Emacs can use.

For GDB/MI https://sourceware.org/gdb/onlinedocs/gdb/GDB_002fMI.html

SPC SPC gdb
Run gdb (like this): gdb -i=mi foo

For RealGUD, install RealGUD from https://github.com/realgud/realgud

SPC SPC load-library ENT realgud ENT
SPC SPC realgud:gdb
Run gdb (like this): gdb foo