linux-kernel - Re: [PATCH] Kbuild: Avoid DTB rebuilds if source files are untouched

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Date:	Tue, 16 Apr 2013 17:02:08 +0100
From:	James Hogan <james.hogan@...tec.com>
To:	Vineet Gupta <Vineet.Gupta1@...opsys.com>
CC:	Stephen Warren <swarren@...dotorg.org>,
	"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Michal Marek <mmarek@...e.cz>,
	Stephen Warren <swarren@...dia.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	<linux-kbuild@...r.kernel.org>, Sam Ravnborg <sam@...nborg.org>
Subject: Re: [PATCH] Kbuild: Avoid DTB rebuilds if source files are untouched

On 16/04/13 16:53, James Hogan wrote:
> On 12/04/13 22:52, Stephen Warren wrote:
>> +.SECONDARY: $(obj)/$(builtindtb-y).dtb.S
> 
> Note, this may not work if you're using CONFIG_ARC_BUILTIN_DTB_NAME,
> since it'll have quotes around it, so you may instead need:
> .SECONDARY: $(obj)/$(patsubst "%",%,$(builtindtb-y)).dtb.S
> 
> (at least that's what's required for the metag equivalent)
> 
>> +
>>  dtbs:  $(addprefix  $(obj)/, $(builtindtb-y).dtb)
> 
> You might find the same thing here too.

Also, I think you probably now want *.dtb.S added to clean-files,
otherwise they won't get removed by make clean.

Cheers
James

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