Merge tag 'kbuild-fixes-v4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git...

Pull Kbuild fixes from Masahiro Yamada:
 "Nothing scary, just some random fixes:

   - fix warnings of host programs

   - fix "make tags" when COMPILED_SOURCE=1 is specified along with O=

   - clarify help message of C=1 option

   - fix dependency for ncurses compatibility check

   - fix "make headers_install" for fakechroot environment"

* tag 'kbuild-fixes-v4.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kconfig: fix sparse warnings in nconfig
  kbuild: fix header installation under fakechroot environment
  kconfig: Check for libncurses before menuconfig
  Kbuild: tiny correction on `make help`
  tags: honor COMPILED_SOURCE with apart output directory
  genksyms: add printf format attribute to error_with_pos()

diff --combined Makefile
index e40c471abe29fbc9e569bc9f4fca4302ec78cfb9,1e2ae78f8ba5045b4cee74667d4e46170d9daf40..57df7569c1bf48900273950e15dc39a67a309eb6
--- 1/Makefile
--- 2/Makefile
+++ b/Makefile
@@@ -1,7 -1,7 +1,7 @@@
  VERSION = 4
  PATCHLEVEL = 12
  SUBLEVEL = 0
 -EXTRAVERSION = -rc2
 +EXTRAVERSION = -rc6
  NAME = Fearless Coyote
  
  # *DOCUMENTATION*
@@@ -1437,7 -1437,7 +1437,7 @@@ help
        @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
        @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
        @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
-       @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
+       @echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK (sparse by default)'
        @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
        @echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
        @echo  '  make W=n   [targets] Enable extra gcc checks, n=1,2,3 where'