Merge tag 'kbuild-v6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - Make Kconfig parse the input .config more precisely

 - Support W=c and W=e options for Kconfig

 - Set Kconfig int/hex symbols to zero if the 'default' property is
   missing

 - Add .editorconfig

 - Add scripts/git.orderFile

 - Add a script to detect backward-incompatible changes in UAPI headers

 - Resolve the symlink passed to O= option properly

 - Use the user-supplied mtime for all files in the builtin initramfs,
   which provides better reproducible builds

 - Fix the direct execution of debian/rules for Debian package builds

 - Use build ID instead of the .gnu_debuglink section for the Debian dbg
   package

* tag 'kbuild-v6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (53 commits)
  kbuild: deb-pkg: use debian/<package> for tmpdir
  kbuild: deb-pkg: move 'make headers' to build-arch
  kbuild: deb-pkg: do not search for 'scripts' directory under arch/
  kbuild: deb-pkg: use build ID instead of debug link for dbg package
  kbuild: deb-pkg: use more debhelper commands in builddeb
  kbuild: deb-pkg: remove unneeded '-f $srctree/Makefile' in debian/rules
  kbuild: deb-pkg: allow to run debian/rules from output directory
  kbuild: deb-pkg: set DEB_* variables if debian/rules is directly executed
  kbuild: deb-pkg: squash scripts/package/deb-build-option to debian/rules
  kbuild: deb-pkg: factor out common Make options in debian/rules
  kbuild: deb-pkg: hard-code Build-Depends
  kbuild: deb-pkg: split debian/copyright from the mkdebian script
  gen_init_cpio: Apply mtime supplied by user to all file types
  kbuild: resolve symlinks for O= properly
  docs: dev-tools: Add UAPI checker documentation
  check-uapi: Introduce check-uapi.sh
  scripts: Introduce a default git.orderFile
  kconfig: WERROR unmet symbol dependency
  Add .editorconfig file for basic formatting
  kconfig: Use KCONFIG_CONFIG instead of .config
  ...

1 files changed, 14 insertions, 9 deletions

diff --git a/Makefile b/Makefile
index f1b2fd977275..e5321e45e4e5 100644
--- a/Makefile
+++ b/Makefile
@@ -155,6 +155,15 @@ endif
 
 export KBUILD_EXTMOD
 
+# backward compatibility
+KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)
+
+ifeq ("$(origin W)", "command line")
+  KBUILD_EXTRA_WARN := $(W)
+endif
+
+export KBUILD_EXTRA_WARN
+
 # Kbuild will save output files in the current working directory.
 # This does not need to match to the root of the kernel source tree.
 #
@@ -181,14 +190,11 @@ ifeq ("$(origin O)", "command line")
 endif
 
 ifneq ($(KBUILD_OUTPUT),)
-# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
-# expand a shell special character '~'. We use a somewhat tedious way here.
-abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
-$(if $(abs_objtree),, \
-     $(error failed to create output directory "$(KBUILD_OUTPUT)"))
-
+# $(realpath ...) gets empty if the path does not exist. Run 'mkdir -p' first.
+$(shell mkdir -p "$(KBUILD_OUTPUT)")
 # $(realpath ...) resolves symlinks
-abs_objtree := $(realpath $(abs_objtree))
+abs_objtree := $(realpath $(KBUILD_OUTPUT))
+$(if $(abs_objtree),,$(error failed to create output directory "$(KBUILD_OUTPUT)"))
 endif # ifneq ($(KBUILD_OUTPUT),)
 
 ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
@@ -609,8 +615,6 @@ export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL
 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
 			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
 			  -prune -o
-export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
-			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
 
 # ===========================================================================
 # Rules shared between *config targets and build targets
@@ -1662,6 +1666,7 @@ help:
 	@echo  '		1: warnings which may be relevant and do not occur too often'
 	@echo  '		2: warnings which occur quite often but may still be relevant'
 	@echo  '		3: more obscure warnings, can most likely be ignored'
+	@echo  '		c: extra checks in the configuration stage (Kconfig)'
 	@echo  '		e: warnings are being treated as errors'
 	@echo  '		Multiple levels can be combined with W=12 or W=123'
 	@$(if $(dtstree), \