linux-kernel - Re: [PATCH 2/4] kconfig: streamline_config.pl: fix out-of-tree builds

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Message-ID: <9b2b86520911200925r55e08858wceae2471fcf3b063@mail.gmail.com>
Date:	Fri, 20 Nov 2009 17:25:25 +0000
From:	Alan Jenkins <sourcejedi.lkml@...glemail.com>
To:	"Luis R. Rodriguez" <lrodriguez@...eros.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Luis Rodriguez <Luis.Rodriguez@...eros.com>,
	"sam@...nborg.org" <sam@...nborg.org>,
	"greg@...ah.com" <greg@...ah.com>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"mcgrof@...il.com" <mcgrof@...il.com>
Subject: Re: [PATCH 2/4] kconfig: streamline_config.pl: fix out-of-tree builds

On 11/20/09, Luis R. Rodriguez <lrodriguez@...eros.com> wrote:
> On Fri, Nov 20, 2009 at 07:50:52AM -0800, Alan Jenkins wrote:
>> We should look for Kconfig under $srctree, just like zconf.l does.
>> This allows "make localmodconfig" to work when using a separate build
>> directory (e.g. make O=../build).
>>
>> Signed-off-by: Alan Jenkins <alan-jenkins@...fmail.co.uk>
>> ---
>>  scripts/kconfig/streamline_config.pl |   10 +++++++---
>>  1 files changed, 7 insertions(+), 3 deletions(-)
>>
>> diff --git a/scripts/kconfig/streamline_config.pl
>> b/scripts/kconfig/streamline_config.pl
>> index 7d898e3..7a7bcf7 100644
>> --- a/scripts/kconfig/streamline_config.pl
>> +++ b/scripts/kconfig/streamline_config.pl
>> @@ -46,7 +46,7 @@ use warnings;
>>  #    make oldconfig
>>  #
>>  my $config = ".config";
>> -my $linuxpath = ".";
>> +my $srctree = $ENV{"srctree"} || ".";
>>
>>  my $uname = `uname -r`;
>>  chomp $uname;
>> @@ -114,7 +114,7 @@ sub find_config {
>>
>>  find_config;
>>
>> -my @makefiles = `find $linuxpath -name Makefile`;
>> +my @makefiles = `find $srctree -name Makefile`;
>>  my %depends;
>>  my %selects;
>>  my %prompts;
>> @@ -135,7 +135,11 @@ sub read_kconfig {
>>      my $config;
>>      my @kconfigs;
>>
>> -    open(KIN, $kconfig) || die "Can't open $kconfig";
>> +    open(KIN, $kconfig) || (
>> +       $kconfig =~ "^[^/]" &&
>> +       open(KIN, $srctree . "/" . $kconfig)
>> +    ) || die "Can't open $kconfig";
>> +
>
> God I hate perl, can this be a little perl-un-obfuscated a bit?

Agreed.  I'll simplify it to

$kconfig = $srctree . "/" . $kconfig;
open(KIN, $kconfig) || die "Can't open $kconfig";

I'll re-send when I've figured out how to stop CONFIG_ATA=m being
deselected.  (It looks like I need to handle "menuconfig" as well as
"config").

Thanks
Alan
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