[Buildroot] [PATCH 0/10] Add dependency on kernel headers

[Yann E. MORIN]

From: "Yann E. MORIN" <yann.morin.1998 at free.fr>

Hello All!

This series introduces infrastructure for packages to depend on the
required version of kernel headers.

It follows the proposal made on the list:
    http://lists.busybox.net/pipermail/buildroot/2014-February/088924.html

The basic idea is to add a symbol for each kernel header version, and
have toolchains select the appropriate symbol, and packages depend on the
appropriate symbol.

In this series:

  - such symbols are added for all kernel headers >= 3.0;

  - the internal toochain backend selects the appropriate symbol
    without user-visible changes;

  - the predefined external toolchains select the appropriate symbols
    without user-visible changes; those using kernel headers older than
    3.0, select nothing, and a comment is added to state so;

  - for the custom external toolchain, a new choice is shown to the
    user, to select the appropriate kernel headers version;

  - five packages are converted to take advantage of this.

For example:

  - BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2012R1 selects
    BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_3

  - dvb-apps depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_3

Regards,
Yann E. MORIN.


----------------------------------------------------------------
Yann E. MORIN (10):
      toolchain/common: add minimum kernel headers options
      manual: document minimal kernel headers dependency
      package/linux-headers: select appropriate 'AT_LEAST_XXX' header version
      toolchain/external: add choice to select 'AT_LEAST_XXX' header version
      toolchain/external: add choice to select 'AT_LEAST_XXX' header version
      package/dvb-apps: requires kernel headers >= 3.3
      package/w_scan: requires kernel headers >= 3.0
      package/weston: requires kernel headers >= 3.0
      package/tvheadend: requires kernel headers >= 3.2
      package/mmc-utils: requires kernel headers >= 3.0

 docs/manual/adding-packages-directory.txt      |  6 +++
 package/dvb-apps/Config.in                     |  5 +-
 package/linux-headers/Config.in.host           | 11 +++++
 package/mmc-utils/Config.in                    |  5 +-
 package/tvheadend/Config.in                    |  5 +-
 package/w_scan/Config.in                       |  4 ++
 package/weston/Config.in                       |  5 +-
 toolchain/toolchain-common.in                  | 59 +++++++++++++++++++++++
 toolchain/toolchain-external/Config-headers.in | 65 ++++++++++++++++++++++++++
 toolchain/toolchain-external/Config.in         | 34 ++++++++++++++
 10 files changed, 191 insertions(+), 8 deletions(-)
 create mode 100644 toolchain/toolchain-external/Config-headers.in

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