linux-kernel - [PATCH 1/6] add symbol value to help find the real depend

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Date:	Sun, 12 Jul 2009 16:11:43 +0800
From:	Cheng Renquan <crq@...nel.org>
To:	linux-kbuild@...r.kernel.org, Sam Ravnborg <sam@...nborg.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, crquan@...il.com
Subject: [PATCH 1/6] add symbol value to help find the real depend

From: Cheng Renquan <crquan@...il.com>

kbuild-menuconfig-display-depend-value.patch

Sometimes when configuring need to disable some unused item, but the item is
selected by many other items, it's hard to find the real dependency which
selected it, This patch add every symbol's value accompanied to make it
possible to find the real dependency easily.

An example is CONFIG_RFKILL,

  ---------------------- RF switch subsystem support ----------------------
  | CONFIG_RFKILL:                                                        |
  |                                                                       |
  | Say Y here if you want to have control over RF switches               |
  | found on many WiFi and Bluetooth cards.                               |
  |                                                                       |
  | To compile this driver as a module, choose M here: the                |
  | module will be called rfkill.                                         |
  |                                                                       |
  | Symbol: RFKILL [=m]                                                   |
  | Prompt: RF switch subsystem support                                   |
  |   Defined at net/rfkill/Kconfig:4                                     |
  |   Depends on: NET [=y]                                                |
  |   Location:                                                           |
  |     -> Networking support (NET [=y])                                  |
  |   Selected by: IWLCORE [=n] && NETDEVICES [=y] && !S390 [=S390] && PC |
  |                                                                       |
  ----------------------------------------------------------------( 99%)---

Signed-off-by: Cheng Renquan <crquan@...il.com>
---
 scripts/kconfig/expr.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/scripts/kconfig/expr.c b/scripts/kconfig/expr.c
index 579ece4..cd8a2f0 100644
--- a/scripts/kconfig/expr.c
+++ b/scripts/kconfig/expr.c
@@ -1098,6 +1098,8 @@ void expr_fprint(struct expr *e, FILE *out)
 static void expr_print_gstr_helper(void *data, struct symbol *sym, const char *str)
 {
 	str_append((struct gstr*)data, str);
+	if (sym)
+		str_printf((struct gstr*)data, " [=%s]", sym_get_string_value(sym));
 }
 
 void expr_gstr_print(struct expr *e, struct gstr *gs)
-- 
1.6.3.3

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