linux-kernel - RE: [PATCH] Fix build failure when CONFIG

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Message-ID: <DBFB1B45AF80394ABD1C807E9F28D15702659CFB3D@BLRX7MCDC203.AMER.DELL.COM>
Date:	Tue, 29 Mar 2011 00:44:23 +0530
From:	<Shyam_Iyer@...l.com>
To:	<randy.dunlap@...cle.com>, <jbarnes@...tuousgeek.org>
CC:	<mjg59@...f.ucam.org>, <Narendra_K@...l.com>,
	<viro@...iv.linux.org.uk>, <sfr@...b.auug.org.au>,
	<linux-kernel@...r.kernel.org>, <linux-next@...r.kernel.org>,
	<Matt_Domsch@...l.com>, <Charles_Rose@...l.com>,
	<Jordan_Hargrave@...l.com>
Subject: RE: [PATCH] Fix build failure when CONFIG_NLS is set to 'm' by
 allmodconfig



> -----Original Message-----
> From: Randy Dunlap [mailto:randy.dunlap@...cle.com]
> Sent: Monday, March 28, 2011 11:02 AM
> To: Jesse Barnes
> Cc: Matthew Garrett; K, Narendra; viro@...iv.linux.org.uk;
> sfr@...b.auug.org.au; linux-kernel@...r.kernel.org; linux-
> next@...r.kernel.org; Iyer, Shyam; Domsch, Matt; Rose, Charles;
> Hargrave, Jordan
> Subject: Re: [PATCH] Fix build failure when CONFIG_NLS is set to 'm' by
> allmodconfig
> 
> On Fri, 4 Mar 2011 10:15:09 -0800 Jesse Barnes wrote:
> 
> > On Wed, 23 Feb 2011 13:17:34 +0000
> > Matthew Garrett <mjg59@...f.ucam.org> wrote:
> >
> > > On Wed, Feb 23, 2011 at 06:24:31PM +0530, Narendra_K@...l.com
> wrote:
> > >
> > > > This patch fixes the following build breakage introduced by the
> patch
> > > > '[PATCH V3] Export ACPI _DSM provided firmware instance number
> and string to
> > > > sysfs'.
> > >
> > > First, you should include this as part of your original patch so
> that
> > > the build doesn't break during bisection.
> > >
> > > > This is fixed by making fs/nls/nls_base.c compile conditionally
> into
> > > > vmlinux by introducing a new config option CONFIG_NLS_BASE which
> is
> > > > selected by (ACPI || DMI || NLS).
> > >
> > > Why?
> > >
> > > > -obj-$(CONFIG_NLS)		+= nls/
> > > > +obj-y				+= nls/
> > >
> > > You seem to have just broken building any of the NLS code as
> modules.
> > >
> > > >  menuconfig NLS
> > > >  	tristate "Native language support"
> > > > +	select NLS_BASE
> > >
> > > All CONFIG_NLS does is build nls_base.
> > >
> > > > +config NLS_BASE
> > > > +	bool "Base NLS functions"
> > > > +	depends on ACPI || DMI
> > >
> > > What in this code depends on ACPI or DMI?
> > >
> > > > -obj-$(CONFIG_NLS)		+= nls_base.o
> > > > +obj-$(CONFIG_NLS_BASE)		+= nls_base.o
> > >
> > > And why make this change?
> > >
> > > Just have something like
> > >
> > > select NLS if (ACPI || DMI)
> > >
> > > in drivers/pci/Kconfig.
> >
> > Narendra, can you send me an updated patch including the build fix?
> > Either using this approach or the other one I outlined in my other
> mail.
> 
> 
> This driver still has build failures in linux-next 20110328.
> 
> pci-label.c:(.text+0x9a40): undefined reference to `utf16s_to_utf8s'
> 
> CONFIG_NLS=m

I don't get this.. you should not be getting CONFIG_NLS=m unless you have stripped you config files really.. :-) Is it possible to get your .config to hit this issue.

-Shyam
> 
> ---
> ~Randy
> *** Remember to use Documentation/SubmitChecklist when testing your
> code ***
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