(gud-gdb-command-name): Explain

"--annotate=3" option is necessary for the Graphical Interface.

diff --git a/lisp/progmodes/gdb-ui.el b/lisp/progmodes/gdb-ui.el
index 431055e9b43fba2cfb57df804096660fddf2aaab..657e85312782a5844f56286350058729d3805b5c 100644 (file)
--- a/lisp/progmodes/gdb-ui.el
+++ b/lisp/progmodes/gdb-ui.el
@@ -1256,7 +1256,9 @@ This filter may simply queue input for a later time."
 ;;
 
 (defcustom gud-gdb-command-name "gdb --annotate=3"
-  "Default command to execute an executable under the GDB debugger."
+  "Default command to execute an executable under the GDB debugger.
+The option \"--annotate=3\" must be included in this value if you
+want the GDB Graphical Interface."
   :type 'string
   :group 'gud
   :version "22.1")