kbuild: remove scripts/multiconfig.sh

We have switched to the single .config configuration system,
the same one as used in Linux Kernel.

The necessary glue code is small enough now, so move it to the
top-level Makefile and scripts/kconfig/Makefile, and then delete
scripts/multiconfig.sh.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

Makefile

@@ -469,10 +469,10 @@ KBUILD_DEFCONFIG := sandbox_defconfig
 export KBUILD_DEFCONFIG KBUILD_KCONFIG
 
 config: scripts_basic outputmakefile FORCE
-	+$(Q)$(CONFIG_SHELL) $(srctree)/scripts/multiconfig.sh $@
+	$(Q)$(MAKE) $(build)=scripts/kconfig $@
 
 %config: scripts_basic outputmakefile FORCE
-	+$(Q)$(CONFIG_SHELL) $(srctree)/scripts/multiconfig.sh $@
+	$(Q)$(MAKE) $(build)=scripts/kconfig $@
 
 else
 # ===========================================================================
@@ -496,6 +496,15 @@ $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 # we execute the config step to be sure to catch updated Kconfig files
 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
+	@# If the following part fails, include/config/auto.conf should be
+	@# deleted so "make silentoldconfig" will be re-run on the next build.
+	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.autoconf || \
+		{ rm -f include/config/auto.conf; false; }
+	@# include/config.h has been updated after "make silentoldconfig".
+	@# We need to touch include/config/auto.conf so it gets newer
+	@# than include/config.h.
+	@# Otherwise, 'make silentoldconfig' would be invoked twice.
+	$(Q)touch include/config/auto.conf
 
 -include include/autoconf.mk
 -include include/autoconf.mk.dep

scripts/kconfig/Makefile

@@ -5,6 +5,12 @@
 PHONY += oldconfig xconfig gconfig menuconfig config silentoldconfig update-po-config \
 	localmodconfig localyesconfig
 
+# Added for U-Boot
+#  Linux has defconfig files in arch/$(SRCARCH)/configs/,
+#  on the other hand, U-Boot does in configs/.
+#  Set SRCARCH to .. fake this Makefile.
+SRCARCH := ..
+
 ifdef KBUILD_KCONFIG
 Kconfig := $(KBUILD_KCONFIG)
 else
@@ -104,6 +110,10 @@ endif
 %_defconfig: $(obj)/conf
 	$(Q)$< --defconfig=arch/$(SRCARCH)/configs/$@ $(Kconfig)
 
+# Added for U-Boot (backward compatibility)
+%_config: %_defconfig
+	@:
+
 configfiles=$(wildcard $(srctree)/kernel/configs/$(1).config $(srctree)/arch/$(SRCARCH)/configs/$(1).config)
 
 define mergeconfig

scripts/multiconfig.sh

@@ -1,90 +0,0 @@
-#!/bin/sh
-#
-# A wrapper script to adjust Kconfig for U-Boot
-#
-# This file will be removed after cleaning up defconfig files
-#
-# Copyright (C) 2014, Masahiro Yamada <yamada.m@jp.panasonic.com>
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
-
-set -e
-
-# Make a configuration target
-# Usage:
-#   run_make_config <target> <objdir>
-# <target>: Make target such as "config", "menuconfig", "defconfig", etc.
-run_make_config () {
-	# Linux expects defconfig files in arch/$(SRCARCH)/configs/ directory,
-	# but U-Boot has them in configs/ directory.
-	# Give SRCARCH=.. to fake scripts/kconfig/Makefile.
-	$MAKE -f $srctree/scripts/Makefile.build obj=scripts/kconfig SRCARCH=.. $1
-}
-
-do_silentoldconfig () {
-	run_make_config silentoldconfig
-
-	# If the following part fails, include/config/auto.conf should be
-	# deleted so "make silentoldconfig" will be re-run on the next build.
-	$MAKE -f $srctree/scripts/Makefile.autoconf || {
-		rm -f include/config/auto.conf
-		exit 1
-	}
-
-	# include/config.h has been updated after "make silentoldconfig".
-	# We need to touch include/config/auto.conf so it gets newer
-	# than include/config.h.
-	# Otherwise, 'make silentoldconfig' would be invoked twice.
-	touch include/config/auto.conf
-}
-
-cleanup_after_defconfig () {
-	rm -f configs/.tmp_defconfig
-	# ignore 'Directory not empty' error
-	# without using non-POSIX option '--ignore-fail-on-non-empty'
-	rmdir arch configs 2>/dev/null || true
-}
-
-# Usage:
-#  do_board_defconfig <board>_defconfig
-do_board_defconfig () {
-	defconfig_path=$srctree/configs/$1
-
-	if [ ! -r $defconfig_path ]; then
-		echo >&2 "***"
-		echo >&2 "*** Can't find default configuration \"configs/$1\"!"
-		echo >&2 "***"
-		exit 1
-	fi
-
-	mkdir -p arch configs
-	# prefix "*:" is deprecated.  Drop it simply.
-	sed -e 's/^[+A-Z]*://' $defconfig_path > configs/.tmp_defconfig
-
-	run_make_config .tmp_defconfig || {
-		cleanup_after_defconfig
-		exit 1
-	}
-
-	cleanup_after_defconfig
-}
-
-do_others () {
-	run_make_config $1
-}
-
-progname=$(basename $0)
-target=$1
-
-case $target in
-*_defconfig)
-	do_board_defconfig $target;;
-*_config)
-	# backward compatibility
-	do_board_defconfig ${target%_config}_defconfig;;
-silentoldconfig)
-	do_silentoldconfig;;
-*)
-	do_others $target;;
-esac