[OE-core] [PATCH v3 0/8] Fix for #7040 - Support for /usr merge

[Amarnath Valluri]

This set of patches implements the long-standing feature - merging of /bin,
/sbin, /libs to their /usr counterparts.

It introduces a 'usrmerge' DISTRO_FEATURE, when it's enabled:
    - other than native all base paths(base_{bin,sbin,lib}dir) points to
      ${exec_prefix}/{bin,sbin,lib}
    - base-files package adds the needed root links(/bin, /sbin, /lib{32,64})
      points to /usr counterparts
    - As most of shell scripts refer "#!/bin/{sh,bash}" inside script, so makes
      sure that get added to RPROVIDES_ list by those packages to satisfy the
      build dependencies.

The assumption is that no recipe uses hard coded paths in recipes where
pre-defined bitbake configuration variables are available. I have fixed quite
many recipes that i found which violates this assumption. A sanity check is
added for reporting these broken recipies.

I have tested this change on core-minimal, sato, windriver cube-desktop and
intel-iot-refkit image builds.  And i would prefer to run autobuilder tests
prior to merging.

Changes in v2:
    - Moved root links creation out from 'base-files' to pre-rootfs.
    - Fixes to lsb, lttng-modules recipes., that are failed in autobuilder
      tests.
    - Added insane check to usrmerge feature.
    - Fixed typos in commit messages.

Changes in v3:
    - Rebased against master and dropped patches those got already merged.
    - As per review comments added new configuration variable ${root_prefix}
      that will be altered based on 'usrmerge' distro feature.
    - Made use of ${root_prefix} in place of ${base_preix} both in systemd
      recipe and cross.bbclass
    - Dropped patch that is touching nativesdk configuration.


Amarnath Valluri (8):
  bitbake.conf: support for merged usr with DISTRO_FEATURE usrmerge
  cross.bbclass: merged /usr support
  systemd: chagnes to support merged /usr
  bash: changes to support merged /usr
  busybox: changes to support merged /usr
  sed: changes to support merged /usr
  image: create symlinks needed for merged /usr
  insane.bbclass: Add package QA check for merged /usr.

 meta/classes/cross.bbclass               |  4 ++--
 meta/classes/image.bbclass               | 23 +++++++++++++++++++++++
 meta/classes/insane.bbclass              | 16 ++++++++++++++++
 meta/conf/bitbake.conf                   | 10 ++++++----
 meta/recipes-core/busybox/busybox.inc    |  2 ++
 meta/recipes-core/systemd/systemd_232.bb |  6 +++---
 meta/recipes-extended/bash/bash.inc      |  2 ++
 meta/recipes-extended/sed/sed_4.2.2.bb   |  1 +
 8 files changed, 55 insertions(+), 9 deletions(-)

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2.7.4