tree ca98af18492ddc48eb298dfb94a603d30ba3e444
parent 3e56f08bffe9e3e2b936eb73bd51d8800d1b42c2
author Cheng Renquan <crq@kernel.org> 1243324987 +0800
committer Sam Ravnborg <sam@ravnborg.org> 1244579865 +0200

kbuild: remove extra ifdef/endif of top Makefile

The GNU make's origin function know undefined variable well,
so the outer ifdef/endif conditional checking is unneeded.

From `info make` documentation, origin will return

  `undefined'
     if VARIABLE was never defined.
  `command line'
     if VARIABLE was defined on the command line.
   ...

Therefore, $(origin V) will get a value anyway, killing ifdef/endif is
viable and safe.

Furthermore, I've checked the minimal requirements from
Documentation/Changes is GNU make 3.79.1, and that version of GNU make
has support of origin function well already, so now it's safe to kill
the outer conditional checking, without upgrading the minimal
requirements.

Signed-off-by: Cheng Renquan <crq@kernel.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>