+(defcustom gdb-create-source-file-list t
+ "Non-nil means create a list of files from which the executable was built.
+Set this to nil if the GUD buffer displays \"initializing...\" in the mode
+line for a long time when starting, possibly because your executable was
+built from a large number of files. This allows quicker initialization
+but means that these files are not automatically enabled for debugging,
+e.g., you won't be able to click in the fringe to set a breakpoint until
+execution has already stopped there."
+ :type 'boolean
+ :group 'gdb
+ :version "23.1")
+