Merge tag 'kbuild-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - add a shell script to get Clang version

 - improve portability of build scripts

 - drop always-enabled CONFIG_THIN_ARCHIVE and remove unused code

 - rename built-in.o which is now thin archive to built-in.a

 - process clean/build targets one by one to get along with -j option

 - simplify ld-option

 - improve building with CONFIG_TRIM_UNUSED_KSYMS

 - define KBUILD_MODNAME even for objects shared among multiple modules

 - avoid linking multiple instances of same objects from composite
   objects

 - move <linux/compiler_types.h> to c_flags to include it only for C
   files

 - clean-up various Makefiles

* tag 'kbuild-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (29 commits)
  kbuild: get <linux/compiler_types.h> out of <linux/kconfig.h>
  kbuild: clean up link rule of composite modules
  kbuild: clean up archive rule of built-in.a
  kbuild: remove partial section mismatch detection for built-in.a
  net: liquidio: clean up Makefile for simpler composite object handling
  lib: zstd: clean up Makefile for simpler composite object handling
  kbuild: link $(real-obj-y) instead of $(obj-y) into built-in.a
  kbuild: rename real-objs-y/m to real-obj-y/m
  kbuild: move modname and modname-multi close to modname_flags
  kbuild: simplify modname calculation
  kbuild: fix modname for composite modules
  kbuild: define KBUILD_MODNAME even if multiple modules share objects
  kbuild: remove unnecessary $(subst $(obj)/, , ...) in modname-multi
  kbuild: Use ls(1) instead of stat(1) to obtain file size
  kbuild: link vmlinux only once for CONFIG_TRIM_UNUSED_KSYMS
  kbuild: move include/config/ksym/* to include/ksym/*
  kbuild: move CONFIG_TRIM_UNUSED_KSYMS code unneeded for external module
  kbuild: restore autoksyms.h touch to the top Makefile
  kbuild: move 'scripts' target below
  kbuild: remove wrong 'touch' in adjust_autoksyms.sh
  ...

12 files changed, 142 insertions, 181 deletions

diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 065324a8046f..cce31ee876b6 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -237,9 +237,7 @@ cc-ldoption = $(call try-run-cached,\
 
 # ld-option
 # Usage: LDFLAGS += $(call ld-option, -X)
-ld-option = $(call try-run-cached,\
-	$(CC) $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -x c /dev/null -c -o "$$TMPO"; \
-	$(LD) $(LDFLAGS) $(1) "$$TMPO" -o "$$TMP",$(1),$(2))
+ld-option = $(call try-run-cached, $(LD) $(LDFLAGS) $(1) -v,$(1),$(2))
 
 # ar-option
 # Usage: KBUILD_ARFLAGS := $(call ar-option,D)
@@ -368,7 +366,7 @@ ksym_dep_filter =                                                            \
 	    $(CPP) $(call flags_nodeps,a_flags) -D__KSYM_DEPS__ $< ;;        \
 	  boot*|build*|cpp_its_S|*cpp_lds_S|dtc|host*|vdso*) : ;;            \
 	  *) echo "Don't know how to preprocess $(1)" >&2; false ;;          \
-	esac | tr ";" "\n" | sed -rn 's/^.*=== __KSYM_(.*) ===.*$$/KSYM_\1/p'
+	esac | tr ";" "\n" | sed -n 's/^.*=== __KSYM_\(.*\) ===.*$$/_\1/p'
 
 cmd_and_fixdep =                                                             \
 	$(echo-cmd) $(cmd_$(1));                                             \
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 4f2b25d43ec9..77cce68c4d63 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -73,11 +73,11 @@ endif
 
 ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
 lib-target := $(obj)/lib.a
-obj-y += $(obj)/lib-ksyms.o
+real-obj-y += $(obj)/lib-ksyms.o
 endif
 
-ifneq ($(strip $(obj-y) $(need-builtin)),)
-builtin-target := $(obj)/built-in.o
+ifneq ($(strip $(real-obj-y) $(need-builtin)),)
+builtin-target := $(obj)/built-in.a
 endif
 
 modorder-target := $(obj)/modules.order
@@ -104,7 +104,7 @@ ifneq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),)
   cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $< ;
 endif
 
-# Do section mismatch analysis for each module/built-in.o
+# Do section mismatch analysis for each module/built-in.a
 ifdef CONFIG_DEBUG_SECTION_MISMATCH
   cmd_secanalysis = ; scripts/mod/modpost $@
 endif
@@ -119,29 +119,17 @@ modkern_cflags =                                          \
 		$(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
 quiet_modtag := $(empty)   $(empty)
 
-$(real-objs-m)        : part-of-module := y
-$(real-objs-m:.o=.i)  : part-of-module := y
-$(real-objs-m:.o=.s)  : part-of-module := y
-$(real-objs-m:.o=.lst): part-of-module := y
+$(real-obj-m)        : part-of-module := y
+$(real-obj-m:.o=.i)  : part-of-module := y
+$(real-obj-m:.o=.s)  : part-of-module := y
+$(real-obj-m:.o=.lst): part-of-module := y
 
-$(real-objs-m)        : quiet_modtag := [M]
-$(real-objs-m:.o=.i)  : quiet_modtag := [M]
-$(real-objs-m:.o=.s)  : quiet_modtag := [M]
-$(real-objs-m:.o=.lst): quiet_modtag := [M]
+$(real-obj-m)        : quiet_modtag := [M]
+$(real-obj-m:.o=.i)  : quiet_modtag := [M]
+$(real-obj-m:.o=.s)  : quiet_modtag := [M]
+$(real-obj-m:.o=.lst): quiet_modtag := [M]
 
-$(obj-m)              : quiet_modtag := [M]
-
-# Default for not multi-part modules
-modname = $(basetarget)
-
-$(multi-objs-m)         : modname = $(modname-multi)
-$(multi-objs-m:.o=.i)   : modname = $(modname-multi)
-$(multi-objs-m:.o=.s)   : modname = $(modname-multi)
-$(multi-objs-m:.o=.lst) : modname = $(modname-multi)
-$(multi-objs-y)         : modname = $(modname-multi)
-$(multi-objs-y:.o=.i)   : modname = $(modname-multi)
-$(multi-objs-y:.o=.s)   : modname = $(modname-multi)
-$(multi-objs-y:.o=.lst) : modname = $(modname-multi)
+$(obj-m)             : quiet_modtag := [M]
 
 quiet_cmd_cc_s_c = CC $(quiet_modtag)  $@
 cmd_cc_s_c       = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<
@@ -314,7 +302,7 @@ endef
 
 # List module undefined symbols (or empty line if not enabled)
 ifdef CONFIG_TRIM_UNUSED_KSYMS
-cmd_undef_syms = $(NM) $@ | sed -n 's/^ \+U //p' | xargs echo
+cmd_undef_syms = $(NM) $@ | sed -n 's/^  *U //p' | xargs echo
 else
 cmd_undef_syms = echo
 endif
@@ -345,8 +333,8 @@ $(obj)/%.lst: $(src)/%.c FORCE
 
 modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL)
 
-$(real-objs-m)      : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
-$(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
+$(real-obj-m)      : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
+$(real-obj-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE)
 
 # .S file exports must have their C prototypes defined in asm/asm-prototypes.h
 # or a file that it includes, in order to get versioned symbols. We build a
@@ -424,7 +412,7 @@ endif
 $(obj)/%.o: $(src)/%.S $(objtool_dep) FORCE
 	$(call if_changed_rule,as_o_S)
 
-targets += $(real-objs-y) $(real-objs-m) $(lib-y)
+targets += $(filter-out $(subdir-obj-y), $(real-obj-y)) $(real-obj-m) $(lib-y)
 targets += $(extra-y) $(MAKECMDGOALS) $(always)
 
 # Linker scripts preprocessor (.lds.S -> .lds)
@@ -458,24 +446,16 @@ $(sort $(subdir-obj-y)): $(subdir-ym) ;
 #
 ifdef builtin-target
 
-ifdef CONFIG_THIN_ARCHIVES
-  cmd_make_builtin = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS)
-  cmd_make_empty_builtin = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS)
-  quiet_cmd_link_o_target = AR      $@
-else
-  cmd_make_builtin = $(LD) $(ld_flags) -r -o
-  cmd_make_empty_builtin = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS)
-  quiet_cmd_link_o_target = LD      $@
-endif
-
-# If the list of objects to link is empty, just create an empty built-in.o
-cmd_link_o_target = $(if $(strip $(obj-y)),\
-		      $(cmd_make_builtin) $@ $(filter $(obj-y), $^) \
-		      $(cmd_secanalysis),\
-		      $(cmd_make_empty_builtin) $@)
+# built-in.a archives are made with no symbol table or index which
+# makes them small and fast, but unable to be used by the linker.
+# scripts/link-vmlinux.sh builds an aggregate built-in.a with a symbol
+# table and index.
+quiet_cmd_ar_builtin = AR      $@
+      cmd_ar_builtin = rm -f $@; \
+                     $(AR) rcSTP$(KBUILD_ARFLAGS) $@ $(filter $(real-obj-y), $^)
 
-$(builtin-target): $(obj-y) FORCE
-	$(call if_changed,link_o_target)
+$(builtin-target): $(real-obj-y) FORCE
+	$(call if_changed,ar_builtin)
 
 targets += $(builtin-target)
 endif # builtin-target
@@ -499,11 +479,8 @@ $(modorder-target): $(subdir-ym) FORCE
 ifdef lib-target
 quiet_cmd_link_l_target = AR      $@
 
-ifdef CONFIG_THIN_ARCHIVES
-  cmd_link_l_target = rm -f $@; $(AR) rcsTP$(KBUILD_ARFLAGS) $@ $(lib-y)
-else
-  cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y)
-endif
+# lib target archives do get a symbol table and index
+cmd_link_l_target = rm -f $@; $(AR) rcsTP$(KBUILD_ARFLAGS) $@ $(lib-y)
 
 $(lib-target): $(lib-y) FORCE
 	$(call if_changed,link_l_target)
@@ -549,22 +526,8 @@ $($(subst $(obj)/,,$(@:.o=-objs)))    \
 $($(subst $(obj)/,,$(@:.o=-y)))       \
 $($(subst $(obj)/,,$(@:.o=-m)))), $^)
 
-cmd_link_multi-link = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
-
-ifdef CONFIG_THIN_ARCHIVES
-  quiet_cmd_link_multi-y = AR      $@
-  cmd_link_multi-y = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS) $@ $(link_multi_deps)
-else
-  quiet_cmd_link_multi-y = LD      $@
-  cmd_link_multi-y = $(cmd_link_multi-link)
-endif
-
 quiet_cmd_link_multi-m = LD [M]  $@
-cmd_link_multi-m = $(cmd_link_multi-link)
-
-$(multi-used-y): FORCE
-	$(call if_changed,link_multi-y)
-$(call multi_depend, $(multi-used-y), .o, -objs -y)
+cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
 
 $(multi-used-m): FORCE
 	$(call if_changed,link_multi-m)
@@ -572,7 +535,7 @@ $(multi-used-m): FORCE
 	   $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod)
 $(call multi_depend, $(multi-used-m), .o, -objs -y -m)
 
-targets += $(multi-used-y) $(multi-used-m)
+targets += $(multi-used-m)
 targets := $(filter-out $(PHONY), $(targets))
 
 # Descending
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index a6f538b31ad6..e3215b7652ee 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -27,7 +27,7 @@ modorder	:= $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko
 
 # Handle objects in subdirs
 # ---------------------------------------------------------------------------
-# o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o
+# o if we encounter foo/ in $(obj-y), replace it by foo/built-in.a
 #   and add the directory to the list of dirs to descend into: $(subdir-y)
 # o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
 #   and add the directory to the list of dirs to descend into: $(subdir-m)
@@ -35,7 +35,7 @@ __subdir-y	:= $(patsubst %/,%,$(filter %/, $(obj-y)))
 subdir-y	+= $(__subdir-y)
 __subdir-m	:= $(patsubst %/,%,$(filter %/, $(obj-m)))
 subdir-m	+= $(__subdir-m)
-obj-y		:= $(patsubst %/, %/built-in.o, $(obj-y))
+obj-y		:= $(patsubst %/, %/built-in.a, $(obj-y))
 obj-m		:= $(filter-out %/, $(obj-m))
 
 # Subdirectories we need to descend into
@@ -47,18 +47,14 @@ multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m
 multi-used   := $(multi-used-y) $(multi-used-m)
 single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m)))
 
-# Build list of the parts of our composite objects, our composite
-# objects depend on those (obviously)
-multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y)))
-multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y)))
-
 # $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to
 # tell kbuild to descend
-subdir-obj-y := $(filter %/built-in.o, $(obj-y))
+subdir-obj-y := $(filter %/built-in.a, $(obj-y))
 
-# Replace multi-part objects by their individual parts, look at local dir only
-real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
-real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m)))
+# Replace multi-part objects by their individual parts,
+# including built-in.a from subdirectories
+real-obj-y := $(foreach m, $(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
+real-obj-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m)))
 
 # DTB
 # If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are built
@@ -71,29 +67,29 @@ extra-y		:= $(addprefix $(obj)/,$(extra-y))
 always		:= $(addprefix $(obj)/,$(always))
 targets		:= $(addprefix $(obj)/,$(targets))
 modorder	:= $(addprefix $(obj)/,$(modorder))
-obj-y		:= $(addprefix $(obj)/,$(obj-y))
 obj-m		:= $(addprefix $(obj)/,$(obj-m))
 lib-y		:= $(addprefix $(obj)/,$(lib-y))
 subdir-obj-y	:= $(addprefix $(obj)/,$(subdir-obj-y))
-real-objs-y	:= $(addprefix $(obj)/,$(real-objs-y))
-real-objs-m	:= $(addprefix $(obj)/,$(real-objs-m))
+real-obj-y	:= $(addprefix $(obj)/,$(real-obj-y))
+real-obj-m	:= $(addprefix $(obj)/,$(real-obj-m))
 single-used-m	:= $(addprefix $(obj)/,$(single-used-m))
-multi-used-y	:= $(addprefix $(obj)/,$(multi-used-y))
 multi-used-m	:= $(addprefix $(obj)/,$(multi-used-m))
-multi-objs-y	:= $(addprefix $(obj)/,$(multi-objs-y))
-multi-objs-m	:= $(addprefix $(obj)/,$(multi-objs-m))
 subdir-ym	:= $(addprefix $(obj)/,$(subdir-ym))
 
+# Finds the multi-part object the current object will be linked into.
+# If the object belongs to two or more multi-part objects, all of them are
+# concatenated with a colon separator.
+modname-multi = $(subst $(space),:,$(sort $(foreach m,$(multi-used),\
+		$(if $(filter $*.o, $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$(m:.o=)))))
+
+modname = $(if $(modname-multi),$(modname-multi),$(basetarget))
+
 # These flags are needed for modversions and compiling, so we define them here
 # $(modname_flags) defines KBUILD_MODNAME as the name of the module it will
 # end up in (or would, if it gets compiled in)
-# Note: Files that end up in two or more modules are compiled without the
-#       KBUILD_MODNAME definition. The reason is that any made-up name would
-#       differ in different configs.
 name-fix = $(squote)$(quote)$(subst $(comma),_,$(subst -,_,$1))$(quote)$(squote)
 basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
-modname_flags  = $(if $(filter 1,$(words $(modname))),\
-                 -DKBUILD_MODNAME=$(call name-fix,$(modname)))
+modname_flags  = -DKBUILD_MODNAME=$(call name-fix,$(modname))
 
 orig_c_flags   = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) \
                  $(ccflags-y) $(CFLAGS_$(basetarget).o)
@@ -156,6 +152,7 @@ __cpp_flags     = $(call flags,_cpp_flags)
 endif
 
 c_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
+		 -include $(srctree)/include/linux/compiler_types.h       \
 		 $(__c_flags) $(modkern_cflags)                           \
 		 $(basename_flags) $(modname_flags)
 
@@ -173,10 +170,6 @@ dtc_cpp_flags  = -Wp,-MD,$(depfile).pre.tmp -nostdinc                    \
 		 $(addprefix -I,$(DTC_INCLUDE))                          \
 		 -undef -D__DTS__
 
-# Finds the multi-part object the current object will be linked into
-modname-multi = $(sort $(foreach m,$(multi-used),\
-		$(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))
-
 # Useful for describing the dependency of composite objects
 # Usage:
 #   $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)
@@ -329,7 +322,7 @@ dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
 size_append = printf $(shell						\
 dec_size=0;								\
 for F in $1; do								\
-	fsize=$$(stat -c "%s" $$F);					\
+	fsize=$$($(CONFIG_SHELL) $(srctree)/scripts/file-size.sh $$F);	\
 	dec_size=$$(expr $$dec_size + $$fsize);				\
 done;									\
 printf "%08x\n" $$dec_size |						\
diff --git a/scripts/adjust_autoksyms.sh b/scripts/adjust_autoksyms.sh
index d67830e6e360..016b3c48a4ec 100755
--- a/scripts/adjust_autoksyms.sh
+++ b/scripts/adjust_autoksyms.sh
@@ -48,9 +48,6 @@ case "${KCONFIG_CONFIG}" in
 	. "./${KCONFIG_CONFIG}"
 esac
 
-# In case it doesn't exist yet...
-if [ -e "$cur_ksyms_file" ]; then touch "$cur_ksyms_file"; fi
-
 # Generate a new ksym list file with symbols needed by the current
 # set of modules.
 cat > "$new_ksyms_file" << EOT
@@ -60,7 +57,9 @@ cat > "$new_ksyms_file" << EOT
 
 EOT
 [ "$(ls -A "$MODVERDIR")" ] &&
-sed -ns -e '3{s/ /\n/g;/^$/!p;}' "$MODVERDIR"/*.mod | sort -u |
+for mod in "$MODVERDIR"/*.mod; do
+	sed -n -e '3{s/ /\n/g;/^$/!p;}' "$mod"
+done | sort -u |
 while read sym; do
 	if [ -n "$CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX" ]; then
 		sym="${sym#_}"
@@ -81,7 +80,7 @@ sort "$cur_ksyms_file" "$new_ksyms_file" | uniq -u |
 sed -n 's/^#define __KSYM_\(.*\) 1/\1/p' | tr "A-Z_" "a-z/" |
 while read sympath; do
 	if [ -z "$sympath" ]; then continue; fi
-	depfile="include/config/ksym/${sympath}.h"
+	depfile="include/ksym/${sympath}.h"
 	mkdir -p "$(dirname "$depfile")"
 	touch "$depfile"
 	# Filesystems with coarse time precision may create timestamps
diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index 449b68c4c90c..f387538c58bc 100644
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -113,11 +113,11 @@ static void usage(void)
 /*
  * Print out a dependency path from a symbol name
  */
-static void print_config(const char *m, int slen)
+static void print_dep(const char *m, int slen, const char *dir)
 {
 	int c, i;
 
-	printf("    $(wildcard include/config/");
+	printf("    $(wildcard %s/", dir);
 	for (i = 0; i < slen; i++) {
 		c = m[i];
 		if (c == '_')
@@ -140,7 +140,7 @@ static void do_extra_deps(void)
 			fprintf(stderr, "fixdep: bad data on stdin\n");
 			exit(1);
 		}
-		print_config(buf, len - 1);
+		print_dep(buf, len - 1, "include/ksym");
 	}
 }
 
@@ -208,7 +208,7 @@ static void use_config(const char *m, int slen)
 	    return;
 
 	define_config(m, slen, hash);
-	print_config(m, slen);
+	print_dep(m, slen, "include/config");
 }
 
 /* test if s ends in sub */
diff --git a/scripts/clang-version.sh b/scripts/clang-version.sh
new file mode 100755
index 000000000000..9780efa56980
--- /dev/null
+++ b/scripts/clang-version.sh
@@ -0,0 +1,33 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# clang-version [-p] clang-command
+#
+# Prints the compiler version of `clang-command' in a canonical 4-digit form
+# such as `0500' for clang-5.0 etc.
+#
+# With the -p option, prints the patchlevel as well, for example `050001' for
+# clang-5.0.1 etc.
+#
+
+if [ "$1" = "-p" ] ; then
+	with_patchlevel=1;
+	shift;
+fi
+
+compiler="$*"
+
+if [ ${#compiler} -eq 0 ]; then
+	echo "Error: No compiler specified."
+	printf "Usage:\n\t$0 <clang-command>\n"
+	exit 1
+fi
+
+MAJOR=$(echo __clang_major__ | $compiler -E -x c - | tail -n 1)
+MINOR=$(echo __clang_minor__ | $compiler -E -x c - | tail -n 1)
+if [ "x$with_patchlevel" != "x" ] ; then
+	PATCHLEVEL=$(echo __clang_patchlevel__ | $compiler -E -x c - | tail -n 1)
+	printf "%02d%02d%02d\\n" $MAJOR $MINOR $PATCHLEVEL
+else
+	printf "%02d%02d\\n" $MAJOR $MINOR
+fi
diff --git a/scripts/file-size.sh b/scripts/file-size.sh
new file mode 100755
index 000000000000..7eb7423416b5
--- /dev/null
+++ b/scripts/file-size.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+set -- $(ls -dn "$1")
+printf '%s\n' "$5"
diff --git a/scripts/gen_initramfs_list.sh b/scripts/gen_initramfs_list.sh
index 86a3c0e5cfbc..10e528b3a08f 100755
--- a/scripts/gen_initramfs_list.sh
+++ b/scripts/gen_initramfs_list.sh
@@ -194,7 +194,7 @@ input_file() {
 	source="$1"
 	if [ -f "$1" ]; then
 		${dep_list}header "$1"
-		is_cpio="$(echo "$1" | sed 's/^.*\.cpio\(\..*\)\?/cpio/')"
+		is_cpio="$(echo "$1" | sed 's/^.*\.cpio\(\..*\)\{0,1\}/cpio/')"
 		if [ $2 -eq 0 -a ${is_cpio} = "cpio" ]; then
 			cpio_file=$1
 			echo "$1" | grep -q '^.*\.cpio\..*' && is_cpio_compressed="compressed"
diff --git a/scripts/headers_install.sh b/scripts/headers_install.sh
index a18bca720995..593f8879c641 100755
--- a/scripts/headers_install.sh
+++ b/scripts/headers_install.sh
@@ -31,13 +31,13 @@ trap 'rm -f "$OUTDIR/$FILE" "$OUTDIR/$FILE.sed"' EXIT
 for i in "$@"
 do
 	FILE="$(basename "$i")"
-	sed -r \
-		-e 's/([ \t(])(__user|__force|__iomem)[ \t]/\1/g' \
-		-e 's/__attribute_const__([ \t]|$)/\1/g' \
+	sed -E \
+		-e 's/([[:space:](])(__user|__force|__iomem)[[:space:]]/\1/g' \
+		-e 's/__attribute_const__([[:space:]]|$)/\1/g' \
 		-e 's@^#include <linux/compiler(|_types).h>@@' \
 		-e 's/(^|[^a-zA-Z0-9])__packed([^a-zA-Z0-9_]|$)/\1__attribute__((packed))\2/g' \
-		-e 's/(^|[ \t(])(inline|asm|volatile)([ \t(]|$)/\1__\2__\3/g' \
-		-e 's@#(ifndef|define|endif[ \t]*/[*])[ \t]*_UAPI@#\1 @' \
+		-e 's/(^|[[:space:](])(inline|asm|volatile)([[:space:](]|$)/\1__\2__\3/g' \
+		-e 's@#(ifndef|define|endif[[:space:]]*/[*])[[:space:]]*_UAPI@#\1 @' \
 		"$SRCDIR/$i" > "$OUTDIR/$FILE.sed" || exit 1
 	scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__ "$OUTDIR/$FILE.sed" \
 		> "$OUTDIR/$FILE"
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index cb3ec53a7c29..eb139a17383c 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -38,8 +38,6 @@ nconfig: $(obj)/nconf
 # for external use.
 silentoldconfig: $(obj)/conf
 	$(Q)mkdir -p include/config include/generated
-	$(Q)test -e include/generated/autoksyms.h || \
-	    touch   include/generated/autoksyms.h
 	$< $(silent) --$@ $(Kconfig)
 
 localyesconfig localmodconfig: $(obj)/streamline_config.pl $(obj)/conf
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index be56a1153014..9045823c7be7 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -4,7 +4,7 @@
 # link vmlinux
 #
 # vmlinux is linked from the objects selected by $(KBUILD_VMLINUX_INIT) and
-# $(KBUILD_VMLINUX_MAIN) and $(KBUILD_VMLINUX_LIBS). Most are built-in.o files
+# $(KBUILD_VMLINUX_MAIN) and $(KBUILD_VMLINUX_LIBS). Most are built-in.a files
 # from top-level directories in the kernel tree, others are specified in
 # arch/$(ARCH)/Makefile. Ordering when linking is important, and
 # $(KBUILD_VMLINUX_INIT) must be first. $(KBUILD_VMLINUX_LIBS) are archives
@@ -18,7 +18,7 @@
 #   |   +--< init/version.o + more
 #   |
 #   +--< $(KBUILD_VMLINUX_MAIN)
-#   |    +--< drivers/built-in.o mm/built-in.o + more
+#   |    +--< drivers/built-in.a mm/built-in.a + more
 #   |
 #   +--< $(KBUILD_VMLINUX_LIBS)
 #   |    +--< lib/lib.a + more
@@ -51,17 +51,15 @@ info()
 #
 # Traditional incremental style of link does not require this step
 #
-# built-in.o output file
+# built-in.a output file
 #
 archive_builtin()
 {
-	if [ -n "${CONFIG_THIN_ARCHIVES}" ]; then
-		info AR built-in.o
-		rm -f built-in.o;
-		${AR} rcsTP${KBUILD_ARFLAGS} built-in.o			\
-					${KBUILD_VMLINUX_INIT}		\
-					${KBUILD_VMLINUX_MAIN}
-	fi
+	info AR built-in.a
+	rm -f built-in.a;
+	${AR} rcsTP${KBUILD_ARFLAGS} built-in.a			\
+				${KBUILD_VMLINUX_INIT}		\
+				${KBUILD_VMLINUX_MAIN}
 }
 
 # Link of vmlinux.o used for section mismatch analysis
@@ -70,20 +68,13 @@ modpost_link()
 {
 	local objects
 
-	if [ -n "${CONFIG_THIN_ARCHIVES}" ]; then
-		objects="--whole-archive				\
-			built-in.o					\
-			--no-whole-archive				\
-			--start-group					\
-			${KBUILD_VMLINUX_LIBS}				\
-			--end-group"
-	else
-		objects="${KBUILD_VMLINUX_INIT}				\
-			--start-group					\
-			${KBUILD_VMLINUX_MAIN}				\
-			${KBUILD_VMLINUX_LIBS}				\
-			--end-group"
-	fi
+	objects="--whole-archive				\
+		built-in.a					\
+		--no-whole-archive				\
+		--start-group					\
+		${KBUILD_VMLINUX_LIBS}				\
+		--end-group"
+
 	${LD} ${LDFLAGS} -r -o ${1} ${objects}
 }
 
@@ -96,46 +87,28 @@ vmlinux_link()
 	local objects
 
 	if [ "${SRCARCH}" != "um" ]; then
-		if [ -n "${CONFIG_THIN_ARCHIVES}" ]; then
-			objects="--whole-archive			\
-				built-in.o				\
-				--no-whole-archive			\
-				--start-group				\
-				${KBUILD_VMLINUX_LIBS}			\
-				--end-group				\
-				${1}"
-		else
-			objects="${KBUILD_VMLINUX_INIT}			\
-				--start-group				\
-				${KBUILD_VMLINUX_MAIN}			\
-				${KBUILD_VMLINUX_LIBS}			\
-				--end-group				\
-				${1}"
-		fi
-
-		${LD} ${LDFLAGS} ${LDFLAGS_vmlinux} -o ${2}		\
+		objects="--whole-archive			\
+			built-in.a				\
+			--no-whole-archive			\
+			--start-group				\
+			${KBUILD_VMLINUX_LIBS}			\
+			--end-group				\
+			${1}"
+
+		${LD} ${LDFLAGS} ${LDFLAGS_vmlinux} -o ${2}	\
 			-T ${lds} ${objects}
 	else
-		if [ -n "${CONFIG_THIN_ARCHIVES}" ]; then
-			objects="-Wl,--whole-archive			\
-				built-in.o				\
-				-Wl,--no-whole-archive			\
-				-Wl,--start-group			\
-				${KBUILD_VMLINUX_LIBS}			\
-				-Wl,--end-group				\
-				${1}"
-		else
-			objects="${KBUILD_VMLINUX_INIT}			\
-				-Wl,--start-group			\
-				${KBUILD_VMLINUX_MAIN}			\
-				${KBUILD_VMLINUX_LIBS}			\
-				-Wl,--end-group				\
-				${1}"
-		fi
-
-		${CC} ${CFLAGS_vmlinux} -o ${2}				\
-			-Wl,-T,${lds}					\
-			${objects}					\
+		objects="-Wl,--whole-archive			\
+			built-in.a				\
+			-Wl,--no-whole-archive			\
+			-Wl,--start-group			\
+			${KBUILD_VMLINUX_LIBS}			\
+			-Wl,--end-group				\
+			${1}"
+
+		${CC} ${CFLAGS_vmlinux} -o ${2}			\
+			-Wl,-T,${lds}				\
+			${objects}				\
 			-lutil -lrt -lpthread
 		rm -f linux
 	fi
@@ -191,7 +164,7 @@ cleanup()
 	rm -f .tmp_System.map
 	rm -f .tmp_kallsyms*
 	rm -f .tmp_vmlinux*
-	rm -f built-in.o
+	rm -f built-in.a
 	rm -f System.map
 	rm -f vmlinux
 	rm -f vmlinux.o
@@ -296,8 +269,8 @@ if [ -n "${CONFIG_KALLSYMS}" ]; then
 	kallsyms .tmp_vmlinux2 .tmp_kallsyms2.o
 
 	# step 3
-	size1=$(stat -c "%s" .tmp_kallsyms1.o)
-	size2=$(stat -c "%s" .tmp_kallsyms2.o)
+	size1=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" .tmp_kallsyms1.o)
+	size2=$(${CONFIG_SHELL} "${srctree}/scripts/file-size.sh" .tmp_kallsyms2.o)
 
 	if [ $size1 -ne $size2 ] || [ -n "${KALLSYMS_EXTRA_PASS}" ]; then
 		kallsymso=.tmp_kallsyms3.o
diff --git a/scripts/namespace.pl b/scripts/namespace.pl
index 729c547fc9e1..6135574a6f39 100755
--- a/scripts/namespace.pl
+++ b/scripts/namespace.pl
@@ -164,7 +164,7 @@ sub linux_objects
 	s:^\./::;
 	if (/.*\.o$/ &&
 		! (
-		m:/built-in.o$:
+		m:/built-in.a$:
 		|| m:arch/x86/vdso/:
 		|| m:arch/x86/boot/:
 		|| m:arch/ia64/ia32/ia32.o$: