linux-kernel - Re: kconfig - a suggestion how to fix the select issue

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Date:	Sun, 4 May 2008 14:37:10 +0200
From:	Oleg Verych <olecom@...wer.upol.cz>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	Adrian Bunk <bunk@...nel.org>,
	Roman Zippel <zippel@...ux-m68k.org>,
	linux-kbuild <linux-kbuild@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: kconfig - a suggestion how to fix the select issue

Sam,

> > Given:
> > - CONFIG_A=y
> > - CONFIG_B=n
> > - CONFIG_D=y
> > - CONFIG_E=n
> > 
> > Will C be visible?
> The above has a syntax error. A 'depends on' cannot have an
> if caluse.

would you please write logic rules with more neutral language, like

(A || B) && C

or similar. Depencies (forward or backward) can be described as

SYM_FOO <- { # depencies/value

  ($SYM_DEP1 || !$SYM_DEP2) && $SYM_DEP3=xx
  # implicit or
  $SYM_DEP4 || $SYM_DEP5

} -> { # selects

  SYM_2SELECT1 = $SYM_BAR ? foo_bar : bar_for
  SYM_2SELECT2 = bar; SYM_BA; SYM_ZZ

# SYM_BA && SYM_ZZ will have value of SYM_FOO
}

or something.

> And I did not get your point either.

I try to design TUI now for better multidimensional walking/selecting on
the web of symbols and decencies, and i don't get those kconfig
constructs.

> Are you trying to say that we cannot improve kconfig to better
> express the dependencies or what is your point?
> 
> Puzzeled...

Thanks.
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