linux-kernel - Re: [RFC PATCH 1/3] kbuild: Warn on selecting symbols with unmet direct dependencies

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Date:	Fri, 11 Jun 2010 13:31:19 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Catalin Marinas <catalin.marinas@....com>,
	linux-geode@...ts.infradead.org
Cc:	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Sam Ravnborg <sam@...nborg.org>, Arnd Bergmann <arnd@...db.de>
Subject: Re: [RFC PATCH 1/3] kbuild: Warn on selecting symbols with unmet
 direct dependencies

On Tue, 08 Jun 2010 17:25:57 +0100 Catalin Marinas wrote:

> The "select" statement in Kconfig files allows the enabling of options
> even if they have unmet direct dependencies (i.e. "depends on" expands
> to "no"). Currently, the "depends on" clauses are used in calculating
> the visibility but they do not affect the reverse dependencies in any
> way.
> 
> The patch introduces additional tracking of the "depends on" statements
> and prints a warning on selecting an option if its direct dependencies
> are not met.


Hi Catalin,

Can these messages (on linux-next-20100611) be modified to include the
kconfig symbol that is causing them?

warning: (IP_VS_PROTO_ESP && NET && NETFILTER && IP_VS || IP_VS_PROTO_AH && NET && NETFILTER && IP_VS) selects IP_VS_PROTO_AH_ESP which has unmet direct dependencies (UNDEFINED)
warning: (SCx200_GPIO && SCx200 || PC8736x_GPIO && X86) selects NSC_GPIO which has unmet direct dependencies (X86_32)

Ah!  It's the first symbol listed in each "phrase":

SCx200_GPIO and PC8736x_GPIO both have this problem.
(I haven't looked at IP_VS yet).

Jordan, is GEODE always 32-bit, so that some of these dependencies could be
cleaned up by using X86_32?

thanks,
---
~Randy
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