I first that at first too, but then I realized that it doesn't do it. The
gdb-mi.el source has the following logic.

  (gdb-input
                                        ; Needs GDB 6.2 onwards.
   (list "-file-list-exec-source-files" 'gdb-get-source-file-list))
  (if gdb-create-source-file-list
      (gdb-input
                                        ; Needs GDB 6.0 onwards.
       (list "-file-list-exec-source-file" 'gdb-get-source-file)))

i.e. the gdb command "-file-list-exec-source-files" (note the s in files)
is called independantly from gdb-create-source-file-list which only
influences the execution of "-file-list-exec-source-file".

On Wed, May 9, 2012 at 12:24 AM, Andreas Schwab <schwab@linux-m68k.org>wrote:

> Dov Grobgeld <dov.grobgeld@gmail.com> writes:
>
> > * Why does gdb-mi.el do -file-list-exec-source-files at all? Can't it
> > search for source files on demand?
>
> Customize gdb-create-source-file-list to nil.
>
> Andreas.
>
> --
> Andreas Schwab, schwab@linux-m68k.org
> GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
> "And now for something completely different."
>