[Buildroot] [PATCH 0 of 5 RFC] uclibc/busybox: fix handling of configuration file

[Thomas De Schampheleire <patrickdepinguin@gmail.com>]

This patch series reworks the uclibc/busybox config file handling, based on
following requirements:

- neither foo-menuconfig nor foo-update-config should have a dependency on
  the toolchain (which means we cannot depend on foo-configure)
- 'clean foo-menuconfig' should start from the specified (custom) config
  file
- 'foo-menuconfig foo-update-config' should preserve the changes made in the
  menuconfig step (this problem is reported for uclibc with bug #7154
  (https://bugs.busybox.net/show_bug.cgi?id=7154).

The series currently covers uclibc and busybox only, while the problem seems
to be present for linux too. It is submitted as an RFC for this reason, as
I'm unsure if there are comments on the approach.

Thanks for your feedback...

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>

---
 package/busybox/busybox.mk |  28 +++++++++++++++++++---------
 package/uclibc/uclibc.mk   |  16 +++++++++++++---
 2 files changed, 32 insertions(+), 12 deletions(-)