[Buildroot] [PATCH 0/3] init: Add s6 as init system

[Vadim Kochan <vadim4j@gmail.com>]

Add new system init support (BR2_INIT_S6) based on s6 suite. This is very-very
basic support which does not have any setup automation logic (but only getty)
but it allows to install custom s6-rc services in a bit easier way by the
board. All s6-rc services which were copied by rootfs-overlay or post-build
will be compiled as s6-rc db into /etc/s6/rc/compiled-initial, which also has
/etc/s6/rc/compiled link to easy replace it in runtime.

In case if such kind of change will be merged, then may be it would be good to
think about of some packages integration into s6-rc system.

v1:
    1) Changed s6-rc compiled path to /etc/s6/rc/compiled-init, added patch which
       allows to use this path as default.

    2) Select s6-rc package if s6 init is choosen.

Vadim Kochan (3):
  package/s6-linux-init: Build also for the host
  package/s6-linux-init: Allow to install as init system
  package/s6-rc: Allow to integrate s6-rc services

 package/s6-linux-init/s6-linux-init.mk             | 69 +++++++++++++++++++-
 ...figure-Allow-to-specify-compiled-base-dir.patch | 76 ++++++++++++++++++++++
 package/s6-rc/rc.init                              |  4 ++
 package/s6-rc/rc.shutdown                          |  3 +
 package/s6-rc/s6-rc.mk                             | 33 ++++++++++
 system/Config.in                                   |  9 ++-
 6 files changed, 191 insertions(+), 3 deletions(-)
 create mode 100644 package/s6-rc/0001-configure-Allow-to-specify-compiled-base-dir.patch
 create mode 100644 package/s6-rc/rc.init
 create mode 100644 package/s6-rc/rc.shutdown

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2.14.1