[PATCH v4 0/3] linux-custom: Split up binaries from kernel headers to kbuild packages

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

Hi

This updated v4 patchset implement suggestions from reviewed v3 patchset.
It's now a set of five patches:
- linux-custom: Split up binaries from kernel headers to kbuild package
- linux-custom: Provide host and target specific kernel kbuild packages
- docs: 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 into kernel kbuild package.
This is introduced by the first commit
"Split up binaries from kernel headers to kbuild package"

The second commit "Provide host and target specific kernel kbuild packages"
introduces that the binaries could 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 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, request "-compat" (and "-native") bitbake targets
  and kbuild packages for target and host will be created automatically

Best regards

Stefan

Stefan Koch (3):
  linux-custom: Split up binaries from kernel headers to kbuild package
  linux-custom: Provide host and target specific kernel kbuild packages
  docs: Update custom_kernel docs for split up of kernel scripts and
    tools

 doc/custom_kernel.md                          | 16 ++--
 .../linux/files/debian/control.tmpl           | 25 ++++++-
 .../linux/files/debian/isar/build.tmpl        | 12 ++-
 .../linux/files/debian/isar/common.tmpl       | 10 +++
 .../linux/files/debian/isar/install.tmpl      | 73 ++++++++++++++-----
 .../linux/files/debian/rules.tmpl             |  2 +-
 meta/recipes-kernel/linux/linux-custom.inc    | 53 ++++++++++++--
 7 files changed, 155 insertions(+), 36 deletions(-)

-- 
2.39.2