Re: static busybox?

[Darren Hart <dvhart@linux.intel.com>]

On 08/01/2012 09:36 AM, Mark Hatle wrote:
> On 8/1/12 11:21 AM, Stuart Yoder wrote:
>> On Tue, Jul 31, 2012 at 3:07 PM, Bruce Ashfield
>> <bruce.ashfield@gmail.com> wrote:
>>> On Tue, Jul 31, 2012 at 3:59 PM, Mark Hatle <mark.hatle@windriver.com> wrote:
>>>> On 7/31/12 1:14 PM, Stuart Yoder wrote:
>>>>>
>>>>> We are doing some work with LXC (containers) and one of the templates
>>>>> is for busybox.  For LXC, the busybox package needs to be built statically
>>>>> and
>>>>> there is a config option for this.
>>>>>
>>>>> A couple possible approaches:
>>>>>
>>>>>      -create a new 'busybox_static' recipe that the lxc package
>>>>>       depends on that turns on the needed build options.   Pretty
>>>>>       straightforward, but now there are 2 variants of the busybox
>>>>>       package.
>>>>>
>>>>>      -somehow propagate some configuration options through to
>>>>>       the standard busybox recipe so it turns on the config
>>>>>       option to build things statically.   Not sure how to
>>>>>       do this, and seems like it could get pretty messy.
>>>>>
>>>>> Any thoughts?
>>>>
>>>>
>>>> We've been talking about this as well..  I'm currently of the opinion that
>>>> the kernel's config fragement processing be added to busybox.  This way
>>>> someone can simply add a configuration fragment via a bbappend, or other
>>>> approach and it'll pick it up.   That same can be used to specify how to
>>>> enable other optional pieces of busybox.
>>>
>>> merge_config.pl can be yanked out of the kernel source tree (it's upstream) and
>>> packaged as something for use by busy box.
>>>
>>> I wouldn't recommend all the scaffolding that the kernel has (it's
>>> overkill, since
>>> there are more configs, patches and git manipulations in play for the
>>> kernel), but a\
>>> simple scheme to collect the fragments from the SRC_URI and fire them through
>>> merge_config.pl would be a pretty simple python routine.
>>
>> So how would this work from the user's point of view?   I somehow
>> need to get busybox's CONFIG_STATIC config option set.   Does the lxc
>> recipe somehow
>> specify this?   Or does the lxc recipe reference a busybox-static
>> dependency that sets the option?
> 
> You would be able to add a .bbappend that would have a configuration fragment in 
> it.  This fragment would be added to the busybox configuration to override any 
> built in items.
> 
> So you'd need to simply have a file that says:
> 
> CONFIG_STATIC = y

Exactly.

And merge_config is a .sh, no perl required :-)

-- 
Darren Hart
Intel Open Source Technology Center
Yocto Project - Technical Lead - Linux Kernel