Merge tag 'kbuild-v5.19-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull more Kbuild updates from Masahiro Yamada:

 - Fix build regressions for parisc, csky, nios2, openrisc

 - Simplify module builds for CONFIG_LTO_CLANG and CONFIG_X86_KERNEL_IBT

 - Remove arch/parisc/nm, which was presumably a workaround for old
   tools

 - Check the odd combination of EXPORT_SYMBOL and 'static' precisely

 - Make external module builds robust against "too long argument error"

 - Support j, k keys for moving the cursor in nconfig

* tag 'kbuild-v5.19-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (25 commits)
  kbuild: Allow to select bash in a modified environment
  scripts: kconfig: nconf: make nconfig accept jk keybindings
  modpost: use fnmatch() to simplify match()
  modpost: simplify mod->name allocation
  kbuild: factor out the common objtool arguments
  kbuild: move vmlinux.o link to scripts/Makefile.vmlinux_o
  kbuild: clean .tmp_* pattern by make clean
  kbuild: remove redundant cleanups in scripts/link-vmlinux.sh
  kbuild: rebuild multi-object modules when objtool is updated
  kbuild: add cmd_and_savecmd macro
  kbuild: make *.mod rule robust against too long argument error
  kbuild: make built-in.a rule robust against too long argument error
  kbuild: check static EXPORT_SYMBOL* by script instead of modpost
  parisc: remove arch/parisc/nm
  kbuild: do not create *.prelink.o for Clang LTO or IBT
  kbuild: replace $(linked-object) with CONFIG options
  kbuild: do not try to parse *.cmd files for objects provided by compiler
  kbuild: replace $(if A,A,B) with $(or A,B) in scripts/Makefile.modpost
  modpost: squash if...else-if in find_elf_symbol2()
  modpost: reuse ARRAY_SIZE() macro for section_mismatch()
  ...

1 files changed, 9 insertions, 117 deletions

diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index a7f6196c7e41..eecc1863e556 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -45,115 +45,6 @@ info()
 	printf "  %-7s %s\n" "${1}" "${2}"
 }
 
-# Generate a linker script to ensure correct ordering of initcalls.
-gen_initcalls()
-{
-	info GEN .tmp_initcalls.lds
-
-	${PYTHON3} ${srctree}/scripts/jobserver-exec		\
-	${PERL} ${srctree}/scripts/generate_initcall_order.pl	\
-		${KBUILD_VMLINUX_OBJS} ${KBUILD_VMLINUX_LIBS}	\
-		> .tmp_initcalls.lds
-}
-
-# Link of vmlinux.o used for section mismatch analysis
-# ${1} output file
-modpost_link()
-{
-	local objects
-	local lds=""
-
-	objects="--whole-archive				\
-		${KBUILD_VMLINUX_OBJS}				\
-		--no-whole-archive				\
-		--start-group					\
-		${KBUILD_VMLINUX_LIBS}				\
-		--end-group"
-
-	if is_enabled CONFIG_LTO_CLANG; then
-		gen_initcalls
-		lds="-T .tmp_initcalls.lds"
-
-		# This might take a while, so indicate that we're doing
-		# an LTO link
-		info LTO ${1}
-	else
-		info LD ${1}
-	fi
-
-	${LD} ${KBUILD_LDFLAGS} -r -o ${1} ${lds} ${objects}
-}
-
-objtool_link()
-{
-	local objtoolcmd;
-	local objtoolopt;
-
-	if ! is_enabled CONFIG_OBJTOOL; then
-		return;
-	fi
-
-	if is_enabled CONFIG_LTO_CLANG || is_enabled CONFIG_X86_KERNEL_IBT; then
-
-		# For LTO and IBT, objtool doesn't run on individual
-		# translation units.  Run everything on vmlinux instead.
-
-		if is_enabled CONFIG_HAVE_JUMP_LABEL_HACK; then
-			objtoolopt="${objtoolopt} --hacks=jump_label"
-		fi
-
-		if is_enabled CONFIG_HAVE_NOINSTR_HACK; then
-			objtoolopt="${objtoolopt} --hacks=noinstr"
-		fi
-
-		if is_enabled CONFIG_X86_KERNEL_IBT; then
-			objtoolopt="${objtoolopt} --ibt"
-		fi
-
-		if is_enabled CONFIG_FTRACE_MCOUNT_USE_OBJTOOL; then
-			objtoolopt="${objtoolopt} --mcount"
-		fi
-
-		if is_enabled CONFIG_UNWINDER_ORC; then
-			objtoolopt="${objtoolopt} --orc"
-		fi
-
-		if is_enabled CONFIG_RETPOLINE; then
-			objtoolopt="${objtoolopt} --retpoline"
-		fi
-
-		if is_enabled CONFIG_SLS; then
-			objtoolopt="${objtoolopt} --sls"
-		fi
-
-		if is_enabled CONFIG_STACK_VALIDATION; then
-			objtoolopt="${objtoolopt} --stackval"
-		fi
-
-		if is_enabled CONFIG_HAVE_STATIC_CALL_INLINE; then
-			objtoolopt="${objtoolopt} --static-call"
-		fi
-
-		objtoolopt="${objtoolopt} --uaccess"
-	fi
-
-	if is_enabled CONFIG_NOINSTR_VALIDATION; then
-		objtoolopt="${objtoolopt} --noinstr"
-	fi
-
-	if [ -n "${objtoolopt}" ]; then
-
-		if is_enabled CONFIG_GCOV_KERNEL; then
-			objtoolopt="${objtoolopt} --no-unreachable"
-		fi
-
-		objtoolopt="${objtoolopt} --link"
-
-		info OBJTOOL ${1}
-		tools/objtool/objtool ${objtoolopt} ${1}
-	fi
-}
-
 # Link of vmlinux
 # ${1} - output file
 # ${2}, ${3}, ... - optional extra .o files
@@ -303,14 +194,9 @@ sorttable()
 cleanup()
 {
 	rm -f .btf.*
-	rm -f .tmp_System.map
-	rm -f .tmp_initcalls.lds
-	rm -f .tmp_vmlinux*
 	rm -f System.map
 	rm -f vmlinux
 	rm -f vmlinux.map
-	rm -f vmlinux.o
-	rm -f .vmlinux.d
 	rm -f .vmlinux.objs
 	rm -f .vmlinux.export.c
 }
@@ -341,12 +227,18 @@ fi;
 ${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init need-builtin=1
 
 #link vmlinux.o
-modpost_link vmlinux.o
-objtool_link vmlinux.o
+${MAKE} -f "${srctree}/scripts/Makefile.vmlinux_o"
 
-# Generate the list of objects in vmlinux
+# Generate the list of in-tree objects in vmlinux
+#
+# This is used to retrieve symbol versions generated by genksyms.
 for f in ${KBUILD_VMLINUX_OBJS} ${KBUILD_VMLINUX_LIBS}; do
 	case ${f} in
+	*libgcc.a)
+		# Some architectures do '$(CC) --print-libgcc-file-name' to
+		# borrow libgcc.a from the toolchain.
+		# There is no EXPORT_SYMBOL in external objects. Ignore this.
+		;;
 	*.a)
 		${AR} t ${f} ;;
 	*)