[PATCH 0/3] linux-custom: Split up binaries from kernel headers to kbuild packages

["Koch, Stefan" <stefan-koch@siemens.com>]

Hi

This patchset is a set of three patches:
- Support overwriting configured schroot dir
- Split up binaries from kernel headers to kbuild packages
- Update custom_kernel docs for split up of kernel scripts and tools

The main use-case was to swap out the binaries
from the kernel headers package.
They will be swapped out into host and target
specific kernel kbuild packages.

The main development goals were these:

1. Solve already known isar custom kernel
limitations from doc/custom_kernel.inc
- kernel headers package does not support both native
  and cross compilation of kernel modules when cross built

2. Honor recommendations for future from doc/custom_kernel.inc
- Generate kernel headers packages for both host and target
  when using cross build

3. Add extensions known from debian kernel packages structure
- Generate a kernel headers package without binaries
- Create specific kernel kbuild packages that
  will ship the "scripts" and "tools" binaries
- Use symlinks to point to the "scripts" and "tools" binaries

4. Be user friendly
- Avoid usage of separate kbuild bitbake recipe that may enforce
  redundant configuration of kernel source definitions with user
  actions to enable kbuild package generation
- Use already known way to include linux-custom.inc in just one
  own bitbake recipe that provides the kernel source definitions
- Keep known user behavior for existing build configurations:
  just update isar, and kbuild packages will be created automatically

Best regards

Stefan

Stefan Koch (3):
  sbuild: Support overwriting configured schroot dir
  linux-custom: Split up binaries from kernel headers to kbuild packages
  docs: Update custom_kernel docs for split up of kernel scripts and
    tools

 doc/custom_kernel.md                          |  13 +--
 meta/classes/sbuild.bbclass                   |   9 +-
 .../linux/files/debian/control.tmpl           |  18 ++-
 .../linux/files/debian/isar/build.tmpl        |   9 +-
 .../linux/files/debian/isar/common.tmpl       |   7 +-
 .../linux/files/debian/isar/install.tmpl      |  64 +++++++++--
 .../linux/files/debian/rules.tmpl             |   5 +-
 meta/recipes-kernel/linux/linux-custom.inc    | 104 ++++++++++++++++--
 8 files changed, 191 insertions(+), 38 deletions(-)

-- 
2.30.2