[PATCH 0/6] kconfig: add support to show hidden options which have prompts

[Li Zefan <lizf@cn.fujitsu.com>]

Usage:
  (in menuconfig)
  Press <Z> to show all config symbols which have prompts.

Quote Tim Bird (http://lkml.org/lkml/2010/3/19/319):

| I've been bitten by this numerous times.  I most often
| use ftrace on ARM, but when I go back to x86, I almost
| always go through a sequence of searching for the
| function graph tracer in the menus, then realizing it's
| completely missing until I disable CC_OPTIMIZE_FOR_SIZE.
|
| Is there any way to have the menu item appear, but be
| unsettable unless the SIZE option is disabled?  I'm
| not a Kconfig guru...

I myself found this useful too. For example, I need to test
ftrace/tracing and want to be sure all the tracing features are
enabled, so I  enter the "Tracers" menu, and press <Z> to
see if there is any config hidden.

I noticed gconfig and xconfig have a button "Show all options",
but that's a bit too much, and I think normally what we are not
interested in those configs which have no prompt thus can't be
changed by users.

Exmaple:

      --- Tracers
      -*-   Kernel Function Tracer
      - -     Kernel Function Graph Tracer
      [*]   Interrupts-off Latency Tracer
      - -   Preemption-off Latency Tracer
      [*]   Sysprof Tracer

Here you can see 2 tracers are not selectable, and then can find
out how to make them selectable.

I also add this support for gconfig, but haven't done for xconfig.

btw: are there many users using gconfig/xconfig today ?

---
 Documentation/kbuild/kconfig-language.txt |    2 +-
 scripts/kconfig/gconf.c                   |  113 ++++++++++-------------------
 scripts/kconfig/gconf.glade               |   26 +++++--
 scripts/kconfig/lkc_proto.h               |    3 +-
 scripts/kconfig/lxdialog/inputbox.c       |    4 +-
 scripts/kconfig/lxdialog/menubox.c        |   22 +++---
 scripts/kconfig/mconf.c                   |   22 +++++-
 scripts/kconfig/menu.c                    |   12 +++-
 scripts/kconfig/zconf.tab.c_shipped       |   21 +++++-
 scripts/kconfig/zconf.y                   |   21 +++++-
 10 files changed, 136 insertions(+), 110 deletions(-)