[Buildroot] how to make two defconfig simultaneously

[Buildroot] how to make two defconfig simultaneously

[Jerry Huang]

Hi, all guys,
Is there any mechanism to make two defconfig simultaneously ?
For example:
"make xxx_defcofnig yyy_defconfig"

After doing this operation, .config file will be created according to these two defconfig xxx_defcofnig and yyy_defconfig.

Best Regards
Jerry Huang

[Buildroot] how to make two defconfig simultaneously

[Thomas Petazzoni]

Hello,

On Thu, 9 Apr 2020 08:13:52 +0000
Jerry Huang <jerry.huang@nxp.com> wrote:

> Hi, all guys,
> Is there any mechanism to make two defconfig simultaneously ?
> For example:
> "make xxx_defcofnig yyy_defconfig"

It is not clear what you want to achieve. Do you want to build
xxx_defconfig and yyy_defconfig as two separate configurations and two
separate builds ?

Or do you want to combine them together because each describes only one
part of the overall system ?

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

[Buildroot] how to make two defconfig simultaneously

[Vladimir Oltean]

Hi Thomas,

On Thu, 9 Apr 2020 at 14:34, Thomas Petazzoni
<thomas.petazzoni@bootlin.com> wrote:
>
> Hello,
>
> On Thu, 9 Apr 2020 08:13:52 +0000
> Jerry Huang <jerry.huang@nxp.com> wrote:
>
> > Hi, all guys,
> > Is there any mechanism to make two defconfig simultaneously ?
> > For example:
> > "make xxx_defcofnig yyy_defconfig"
>
> It is not clear what you want to achieve. Do you want to build
> xxx_defconfig and yyy_defconfig as two separate configurations and two
> separate builds ?
>
> Or do you want to combine them together because each describes only one
> part of the overall system ?
>
> Thomas
> --
> Thomas Petazzoni, CTO, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com

I would assume the question is about merging a defconfig with multiple
fragments.

Thanks,
-Vladimir

[Buildroot] how to make two defconfig simultaneously

[Thomas Petazzoni]

On Thu, 9 Apr 2020 15:16:36 +0300
Vladimir Oltean <olteanv@gmail.com> wrote:

> > Thomas Petazzoni, CTO, Bootlin
> > Embedded Linux and Kernel engineering
> > https://bootlin.com  
> 
> I would assume the question is about merging a defconfig with multiple
> fragments.

Then:

$ ./support/kconfig/merge_config.sh fragment1 fragment2

see also
https://bootlin.com/doc/training/buildroot/buildroot-slides.pdf slides
43 and 44.

However, I would recommend to *not* store fragments under configs/ with
a _defconfig suffix, as this is normally used for complete defconfigs,
not fragments.

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

[Buildroot] how to make two defconfig simultaneously

[Vladimir Oltean]

On Thu, 9 Apr 2020 at 15:25, Thomas Petazzoni
<thomas.petazzoni@bootlin.com> wrote:
>
> On Thu, 9 Apr 2020 15:16:36 +0300
> Vladimir Oltean <olteanv@gmail.com> wrote:
>
> > > Thomas Petazzoni, CTO, Bootlin
> > > Embedded Linux and Kernel engineering
> > > https://bootlin.com
> >
> > I would assume the question is about merging a defconfig with multiple
> > fragments.
>
> Then:
>
> $ ./support/kconfig/merge_config.sh fragment1 fragment2
>
> see also
> https://bootlin.com/doc/training/buildroot/buildroot-slides.pdf slides
> 43 and 44.
>
> However, I would recommend to *not* store fragments under configs/ with
> a _defconfig suffix, as this is normally used for complete defconfigs,
> not fragments.
>
> Thomas
> --
> Thomas Petazzoni, CTO, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com

Ok, this answers the 'how to merge them' portion of the question.
Are there guidelines for where defconfig fragments _can_ be stored,
how they should be structured, named, what they can contain? All the
files that I see in the configs/ folder are simple defconfigs.

Thanks,
-Vladimir

[Buildroot] [EXT] Re: how to make two defconfig simultaneously

[Jerry Huang]

Best Regards
Jerry Huang

> -----Original Message-----
> From: Vladimir Oltean <olteanv@gmail.com>
> Sent: Thursday, April 9, 2020 8:17 PM
> To: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
> Cc: Jerry Huang <jerry.huang@nxp.com>; Heiko Thiery
> <heiko.thiery@gmail.com>; buildroot at busybox.net; Michael Walle
> <michael@walle.cc>; matthew.weber at collins.com; geomatsi at gmail.com
> Subject: [EXT] Re: [Buildroot] how to make two defconfig simultaneously
> 
> Caution: EXT Email
> 
> Hi Thomas,
> 
> On Thu, 9 Apr 2020 at 14:34, Thomas Petazzoni
> <thomas.petazzoni@bootlin.com> wrote:
> >
> > Hello,
> >
> > On Thu, 9 Apr 2020 08:13:52 +0000
> > Jerry Huang <jerry.huang@nxp.com> wrote:
> >
> > > Hi, all guys,
> > > Is there any mechanism to make two defconfig simultaneously ?
> > > For example:
> > > "make xxx_defcofnig yyy_defconfig"
> >
> > It is not clear what you want to achieve. Do you want to build
> > xxx_defconfig and yyy_defconfig as two separate configurations and two
> > separate builds ?
> >
> > Or do you want to combine them together because each describes only
> > one part of the overall system ?
> >
> > Thomas
> > --
> > Thomas Petazzoni, CTO, Bootlin
> > Embedded Linux and Kernel engineering
> > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fboot
> >
> lin.com%2F&amp;data=02%7C01%7Cjerry.huang%40nxp.com%7Ce7d05d28845
> b4814
> >
> 915308d7dc7fe08d%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C63
> 722031
> >
> 4094883841&amp;sdata=Sd7B87UCsB8NS3js1OtmDEytOeClhUOFHfXTrhWqsn
> M%3D&am
> > p;reserved=0
> 
> I would assume the question is about merging a defconfig with multiple
> fragments.
Yes, this is my purpose.

> Thanks,
> -Vladimir

[Buildroot] [EXT] Re: how to make two defconfig simultaneously

[Jerry Huang]

Best Regards
Jerry Huang

> -----Original Message-----
> From: Vladimir Oltean <olteanv@gmail.com>
> Sent: Thursday, April 9, 2020 8:46 PM
> To: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
> Cc: Jerry Huang <jerry.huang@nxp.com>; Heiko Thiery
> <heiko.thiery@gmail.com>; buildroot at busybox.net; Michael Walle
> <michael@walle.cc>; matthew.weber at collins.com; geomatsi at gmail.com
> Subject: [EXT] Re: [Buildroot] how to make two defconfig simultaneously
> 
> Caution: EXT Email
> 
> On Thu, 9 Apr 2020 at 15:25, Thomas Petazzoni
> <thomas.petazzoni@bootlin.com> wrote:
> >
> > On Thu, 9 Apr 2020 15:16:36 +0300
> > Vladimir Oltean <olteanv@gmail.com> wrote:
> >
> > > > Thomas Petazzoni, CTO, Bootlin
> > > > Embedded Linux and Kernel engineering
> > > > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2F
> > > >
> bootlin.com%2F&amp;data=02%7C01%7Cjerry.huang%40nxp.com%7Caa2566c
> 3
> > > >
> daca4d2d7f4a08d7dc83ed07%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%
> 7C
> > > >
> 1%7C637220331486875411&amp;sdata=cE7A7OhJopKeT7Z7ZvvIhaC6fJ9VdfFKC
> > > > 1IAns0ZwCc%3D&amp;reserved=0
> > >
> > > I would assume the question is about merging a defconfig with
> > > multiple fragments.
> >
> > Then:
> >
> > $ ./support/kconfig/merge_config.sh fragment1 fragment2
> >
> > see also
> > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fboot
> > lin.com%2Fdoc%2Ftraining%2Fbuildroot%2Fbuildroot-slides.pdf&amp;data=0
> >
> 2%7C01%7Cjerry.huang%40nxp.com%7Caa2566c3daca4d2d7f4a08d7dc83ed07
> %7C68
> >
> 6ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C1%7C637220331486875411&amp
> ;sdata=
> >
> WbhRwcsABaCuTXLRIPz%2F0AqVbgZPXeFjA6lg%2BM6WL34%3D&amp;reserve
> d=0
> > slides
> > 43 and 44.
> >
> > However, I would recommend to *not* store fragments under configs/
> > with a _defconfig suffix, as this is normally used for complete
> > defconfigs, not fragments.
> >
> > Thomas
> > --
> > Thomas Petazzoni, CTO, Bootlin
> > Embedded Linux and Kernel engineering
> > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fboot
> >
> lin.com%2F&amp;data=02%7C01%7Cjerry.huang%40nxp.com%7Caa2566c3dac
> a4d2d
> >
> 7f4a08d7dc83ed07%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C1%7C63
> 722033
> >
> 1486885410&amp;sdata=s9%2F4o8MhHm7fftdxDYiaFBF1kwo544D6l5TkRuqZN
> qI%3D&
> > amp;reserved=0
> 
> Ok, this answers the 'how to merge them' portion of the question.
> Are there guidelines for where defconfig fragments _can_ be stored, how they
> should be structured, named, what they can contain? All the files that I see in
> the configs/ folder are simple defconfigs.

They are that I want to know.


> Thanks,
> -Vladimir

[Buildroot] how to make two defconfig simultaneously

[Thomas Petazzoni]

On Thu, 9 Apr 2020 15:45:35 +0300
Vladimir Oltean <olteanv@gmail.com> wrote:

> Ok, this answers the 'how to merge them' portion of the question.
> Are there guidelines for where defconfig fragments _can_ be stored,
> how they should be structured, named, what they can contain? All the
> files that I see in the configs/ folder are simple defconfigs.

They can be stored wherever you want, and there are no particular
guidelines on how they should be structured. Each project will have its
own constraints. What matters is that Buildroot takes as input a single
.config file: how this .config file is produced is not relevant to
Buildroot.

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com