Merge tag 'kbuild-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - do not generate unneeded top-level built-in.a

 - let git ignore O= directory entirely

 - optimize scripts/kallsyms slightly

 - exclude DWARF info from *.s regardless of config options

 - fix GCC toolchain search path for Clang to prepare ld.lld support

 - do not generate modules.order when CONFIG_MODULES is disabled

 - simplify single target rules and remove VPATH for external module
   build

 - allow to add optional flags to dpkg-buildpackage when building
   deb-pkg

 - move some compiler option tests from Makefile to Kconfig

 - various Makefile cleanups

* tag 'kbuild-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (40 commits)
  kbuild: remove scripts/basic/% build target
  kbuild: use -Werror=implicit-... instead of -Werror-implicit-...
  kbuild: clean up scripts/gcc-version.sh
  kbuild: remove cc-version macro
  kbuild: update comment block of scripts/clang-version.sh
  kbuild: remove commented-out INITRD_COMPRESS
  kbuild: move -gsplit-dwarf, -gdwarf-4 option tests to Kconfig
  kbuild: [bin]deb-pkg: add DPKG_FLAGS variable
  kbuild: move ".config not found!" message from Kconfig to Makefile
  kbuild: invoke syncconfig if include/config/auto.conf.cmd is missing
  kbuild: simplify single target rules
  kbuild: remove empty rules for makefiles
  kbuild: make -r/-R effective in top Makefile for old Make versions
  kbuild: move tools_silent to a more relevant place
  kbuild: compute false-positive -Wmaybe-uninitialized cases in Kconfig
  kbuild: refactor cc-cross-prefix implementation
  kbuild: hardcode genksyms path and remove GENKSYMS variable
  scripts/gdb: refactor rules for symlink creation
  kbuild: create symlink to vmlinux-gdb.py in scripts_gdb target
  scripts/gdb: do not descend into scripts/gdb from scripts
  ...

4 files changed, 14 insertions, 12 deletions

diff --git a/scripts/package/Makefile b/scripts/package/Makefile
index 453fecee62f0..2c6de21e5152 100644
--- a/scripts/package/Makefile
+++ b/scripts/package/Makefile
@@ -59,7 +59,7 @@ rpm-pkg: FORCE
 # binrpm-pkg
 # ---------------------------------------------------------------------------
 binrpm-pkg: FORCE
-	$(MAKE) KBUILD_SRC=
+	$(MAKE) -f $(srctree)/Makefile
 	$(CONFIG_SHELL) $(MKSPEC) prebuilt > $(objtree)/binkernel.spec
 	+rpmbuild $(RPMOPTS) --define "_builddir $(objtree)" --target \
 		$(UTS_MACHINE) -bb $(objtree)/binkernel.spec
@@ -72,11 +72,11 @@ deb-pkg: FORCE
 	$(call cmd,src_tar,$(KDEB_SOURCENAME))
 	origversion=$$(dpkg-parsechangelog -SVersion |sed 's/-[^-]*$$//');\
 		mv $(KDEB_SOURCENAME).tar.gz ../$(KDEB_SOURCENAME)_$${origversion}.orig.tar.gz
-	+dpkg-buildpackage -r$(KBUILD_PKG_ROOTCMD) -a$$(cat debian/arch) -i.git -us -uc
+	+dpkg-buildpackage -r$(KBUILD_PKG_ROOTCMD) -a$$(cat debian/arch) $(DPKG_FLAGS) -i.git -us -uc
 
 bindeb-pkg: FORCE
 	$(CONFIG_SHELL) $(srctree)/scripts/package/mkdebian
-	+dpkg-buildpackage -r$(KBUILD_PKG_ROOTCMD) -a$$(cat debian/arch) -b -nc -uc
+	+dpkg-buildpackage -r$(KBUILD_PKG_ROOTCMD) -a$$(cat debian/arch) $(DPKG_FLAGS) -b -nc -uc
 
 intdeb-pkg: FORCE
 	+$(CONFIG_SHELL) $(srctree)/scripts/package/builddeb
@@ -102,7 +102,7 @@ clean-dirs += $(objtree)/snap/
 # tarball targets
 # ---------------------------------------------------------------------------
 tar%pkg: FORCE
-	$(MAKE) KBUILD_SRC=
+	$(MAKE) -f $(srctree)/Makefile
 	$(CONFIG_SHELL) $(srctree)/scripts/package/buildtar $@
 
 clean-dirs += $(objtree)/tar-install/
diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index f43a274f4f1d..8ac25d10a6ad 100755
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -86,12 +86,12 @@ cp "$($MAKE -s -f $srctree/Makefile image_name)" "$tmpdir/$installed_image_path"
 if grep -q "^CONFIG_OF_EARLY_FLATTREE=y" $KCONFIG_CONFIG ; then
 	# Only some architectures with OF support have this target
 	if [ -d "${srctree}/arch/$SRCARCH/boot/dts" ]; then
-		$MAKE KBUILD_SRC= INSTALL_DTBS_PATH="$tmpdir/usr/lib/$packagename" dtbs_install
+		$MAKE -f $srctree/Makefile INSTALL_DTBS_PATH="$tmpdir/usr/lib/$packagename" dtbs_install
 	fi
 fi
 
 if grep -q '^CONFIG_MODULES=y' $KCONFIG_CONFIG ; then
-	INSTALL_MOD_PATH="$tmpdir" $MAKE KBUILD_SRC= modules_install
+	INSTALL_MOD_PATH="$tmpdir" $MAKE -f $srctree/Makefile modules_install
 	rm -f "$tmpdir/lib/modules/$version/build"
 	rm -f "$tmpdir/lib/modules/$version/source"
 	if [ "$ARCH" = "um" ] ; then
@@ -113,14 +113,14 @@ if grep -q '^CONFIG_MODULES=y' $KCONFIG_CONFIG ; then
 		# resign stripped modules
 		MODULE_SIG_ALL="$(grep -s '^CONFIG_MODULE_SIG_ALL=y' $KCONFIG_CONFIG || true)"
 		if [ -n "$MODULE_SIG_ALL" ]; then
-			INSTALL_MOD_PATH="$tmpdir" $MAKE KBUILD_SRC= modules_sign
+			INSTALL_MOD_PATH="$tmpdir" $MAKE -f $srctree/Makefile modules_sign
 		fi
 	fi
 fi
 
 if [ "$ARCH" != "um" ]; then
-	$MAKE headers_check KBUILD_SRC=
-	$MAKE headers_install KBUILD_SRC= INSTALL_HDR_PATH="$libc_headers_dir/usr"
+	$MAKE -f $srctree/Makefile headers_check
+	$MAKE -f $srctree/Makefile headers_install INSTALL_HDR_PATH="$libc_headers_dir/usr"
 fi
 
 # Install the maintainer scripts
diff --git a/scripts/package/buildtar b/scripts/package/buildtar
index d624a07a4e77..cfd2a4a3fe42 100755
--- a/scripts/package/buildtar
+++ b/scripts/package/buildtar
@@ -57,7 +57,7 @@ dirs=boot
 # Try to install modules
 #
 if grep -q '^CONFIG_MODULES=y' "${KCONFIG_CONFIG}"; then
-	make ARCH="${ARCH}" O="${objtree}" KBUILD_SRC= INSTALL_MOD_PATH="${tmpdir}" modules_install
+	make ARCH="${ARCH}" -f ${srctree}/Makefile INSTALL_MOD_PATH="${tmpdir}" modules_install
 	dirs="$dirs lib"
 fi
 
diff --git a/scripts/package/mkdebian b/scripts/package/mkdebian
index edcad61fe3cd..f030961c5165 100755
--- a/scripts/package/mkdebian
+++ b/scripts/package/mkdebian
@@ -205,13 +205,15 @@ EOF
 cat <<EOF > debian/rules
 #!$(command -v $MAKE) -f
 
+srctree ?= .
+
 build:
 	\$(MAKE) KERNELRELEASE=${version} ARCH=${ARCH} \
-	KBUILD_BUILD_VERSION=${revision} KBUILD_SRC=
+	KBUILD_BUILD_VERSION=${revision} -f \$(srctree)/Makefile
 
 binary-arch:
 	\$(MAKE) KERNELRELEASE=${version} ARCH=${ARCH} \
-	KBUILD_BUILD_VERSION=${revision} KBUILD_SRC= intdeb-pkg
+	KBUILD_BUILD_VERSION=${revision} -f \$(srctree)/Makefile intdeb-pkg
 
 clean:
 	rm -rf debian/*tmp debian/files