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From: Randy Dunlap <randy.dunlap@oracle.com>
To: lkml <linux-kernel@vger.kernel.org>
Cc: zippel@linux-m68k.org, jejb <james.bottomley@steeleye.com>
Subject: how to handle indirect kconfig dependencies
Date: Thu, 16 Nov 2006 20:07:41 -0800	[thread overview]
Message-ID: <20061116200741.fb607fe4.randy.dunlap@oracle.com> (raw)

Hi,

I have a (randconfig) build of 2.6.19-rc5-mm2 with:

CONFIG_DEBUG_READAHEAD=y

which selects DEBUG_FS, so DEBUG_FS=y, but DEBUG_FS depends on
SYSFS, and SYSFS is not set in the randconfig.

This randconfig causes this build error:

fs/built-in.o: In function `debugfs_init':
inode.c:(.init.text+0xdb2): undefined reference to `kernel_subsys'

so the question is:
(How) can kconfig follow the dependency chain and either
- prevent this odd config combination or
- see that 'select DEBUG_FS' implies 'select SYSFS' and then enable SYSFS
?

I don't believe that the right answer is to add
	depends on SYSFS
to DEBUG_READAHEAD.


.config is at http://oss.oracle.com/~rdunlap/configs/config-readahead-debugfs

Thanks,
---
~Randy [or just kill off select]

             reply	other threads:[~2006-11-17  4:07 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-11-17  4:07 Randy Dunlap [this message]
2006-11-17 13:55 ` how to handle indirect kconfig dependencies Stefan Richter
2006-11-20 18:13   ` Adrian Bunk
2006-11-20 18:56     ` Stefan Richter
2006-11-20 22:09 ` James Bottomley
2006-11-26  3:46 ` Randy Dunlap

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