[OE-core] [PATCH 2/2] local.conf.sample: Document HOW-TO enable systemd or busbox to replace sysvinit

[Khem Raj]

> On Jan 22, 2016, at 12:57 PM, Tanu Kaskinen <tanuk at iki.fi> wrote:
> 
> On Fri, 2016-01-22 at 20:49 +0000, Khem Raj wrote:
>> OE core provides systemd,busybox as options for system init system along
>> with sysvinit being the default. Document the needed settings to enable
>> systemd and busybox as options if user wishes.
>> 
>> Signed-off-by: Khem Raj <raj.khem at gmail.com>
>> ---
>>  meta/conf/local.conf.sample | 17 +++++++++++++++++
>>  1 file changed, 17 insertions(+)
>> 
>> diff --git a/meta/conf/local.conf.sample b/meta/conf/local.conf.sample
>> index a662f4d..b760546 100644
>> --- a/meta/conf/local.conf.sample
>> +++ b/meta/conf/local.conf.sample
>> @@ -209,6 +209,23 @@ PACKAGECONFIG_append_pn-qemu-native = " sdl"
>>  PACKAGECONFIG_append_pn-nativesdk-qemu = " sdl"
>>  #ASSUME_PROVIDED += "libsdl-native"
>> 
>> +#
>> +# Use busybox/mdev for system initialization
>> +#
>> +#VIRTUAL-RUNTIME_dev_manager = "busybox-mdev"
>> +#VIRTUAL-RUNTIME_login_manager = "busybox"
>> +#VIRTUAL-RUNTIME_init_manager = "busybox"
>> +#VIRTUAL-RUNTIME_initscripts = "initscripts"
>> +#VIRTUAL-RUNTIME_keymaps = "keymaps"
>> +#DISTRO_FEATURES_BACKFILL_CONSIDERED += "sysvinit"
>> +
>> +#
>> +# Use systemd for system initialization
>> +#
>> +#DISTRO_FEATURES_append = " systemd sysvinit"
>> +#DISTRO_FEATURES_BACKFILL_CONSIDERED += "sysvinit"
> 
> Why is sysvinit included in both DISTRO_FEATURES and
> DISTRO_FEATURES_BACKFILL_CONSIDERED? My understanding is that
> BACKFILL_CONSIDERED only makes sense when the value is not included in
> DISTRO_FEATURES.

There are two possibilities. one where its pure systemd no sysvinit, in this case
we should have DISTRO_FEATURES_BACKFILL_CONSIDERED += “sysvinit” and remove
DISTRO_FEATURES_append.

In case where we want sysvinit scripts also be there and systemd can execute on them
then above setting is needed as it is. Option 2 is what I have tried to put in there

> 
> --
> Tanu

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