Homepage: https://www.emacswiki.org/emacs/GDB-MI
Author: Nick Roberts
User Interface for running GDB
This mode acts as a graphical user interface to GDB. You can interact with
GDB through the GUD buffer in the usual way, but there are also further
buffers which control the execution and describe the state of your program.
It separates the input/output of your program from that of GDB and displays
expressions and their current values in their own buffers. It also uses
features such as the fringe/display margin for breakpoints, and
the toolbar (see the GDB Graphical Interface section in the Emacs info
manual).
M-x gdb will start the debugger.
This file uses GDB/MI as the primary interface to GDB. It runs gdb with
GDB/MI (-interp=mi) and access CLI using "-interpreter-exec console
cli-command". This code replaces gdb-ui.el and uses MI tokens instead
of queues. Eventually MI should be asynchronous.
Windows Platforms:
If you are using Emacs and GDB on Windows you will need to flush the buffer
explicitly in your program if you want timely display of I/O in Emacs.
Alternatively you can make the output stream unbuffered, for example, by
using a macro:
#ifdef UNBUFFERED
setvbuf (stdout, (char *) NULL, _IONBF, 0);
#endif
and compiling with -DUNBUFFERED while debugging.
If you are using Cygwin GDB and find that the source is not being displayed
in Emacs when you step through it, possible solutions are to:
1) Use Cygwin X Windows and Cygwin Emacs.
(Since 22.1 Emacs builds under Cygwin.)
2) Use MinGW GDB instead.
3) Use cygwin-mount.el