[Buildroot] [PATCH 0 of 6] uclibc: fix handling of configuration file

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

This patch series (part of it poster earlier as RFC) has as main goal to
fix the uclibc kconfig handling with following requirements in mind:

- 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).

- 'make foo-menuconfig; make foo-menuconfig' should preserve the changes
  made in the menuconfig step.

- 'make clean foo-update-config' should copy the initial file, do any
  fixups, and then save the config


In the process, some smaller changes are done too.

Once this series is accepted, the plan is:
- to extract the kconfig-related bits to a kconfig-package infrastructure.
- to convert busybox, linux and barebox to this kconfig-package infra too.

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

---
Thomas De Schampheleire (6):
    pkg-utils: kconfig helpers: add basic usage documentation
    pkg-utils: kconfig helpers: use single iso double quoting
    uclibc: replace custom kconfig helpers with those provided by pkg-utils
    uclibc: rename SETUP_DOT_CONFIG to FIXUP_DOT_CONFIG
    uclibc: menuconfig: take into account initial settings from config file
    uclibc: update-config: preserve freshly configured settings


 linux/linux.mk           |    2 +-
 package/pkg-utils.mk     |   12 +-
 package/uclibc/uclibc.mk |  230 ++++++++++++++++++--------------------
 3 files changed, 119 insertions(+), 125 deletions(-)