[PATCH v2 09/10] kbuild: Add config fragment merge functionality

From: Alexander Stein <alexander.stein@ew.tq-group.com>
To: Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Arnd Bergmann <arnd@arndb.de>, Olof Johansson <olof@lixom.net>,
	Shawn Guo <shawnguo@kernel.org>, Li Yang <leoyang.li@nxp.com>,
	Russell King <linux@armlinux.org.uk>, Marek Vasut <marex@denx.de>,
	Marcel Ziswiler <marcel.ziswiler@toradex.com>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Nicholas Piggin <npiggin@gmail.com>,
	Christophe Leroy <christophe.leroy@csgroup.eu>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Nathan Chancellor <nathan@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Nicolas Schier <nicolas@fjasle.eu>
Cc: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
	soc@kernel.org, devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linuxppc-dev@lists.ozlabs.org, linux-kbuild@vger.kernel.org,
	Alexander Stein <alexander.stein@ew.tq-group.com>
Subject: [PATCH v2 09/10] kbuild: Add config fragment merge functionality
Date: Fri, 20 Jan 2023 14:34:54 +0100	[thread overview]
Message-ID: <20230120133455.3962413-10-alexander.stein@ew.tq-group.com> (raw)
In-Reply-To: <20230120133455.3962413-1-alexander.stein@ew.tq-group.com>

From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>

So far this function was only used locally in powerpc, some other
architectures might benefit from it. Move it into
scripts/Makefile.defconf.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
---
Directly applied from https://lore.kernel.org/linux-arm-kernel/20200203184820.4433-2-nsaenzjulienne@suse.de/T/#m96968dd45c0aaa88e0a7387024b5ac13b002363d

 arch/powerpc/Makefile    | 12 +-----------
 scripts/Makefile.defconf | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 11 deletions(-)
 create mode 100644 scripts/Makefile.defconf

diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index dc4cbf0a5ca95..533457466ce25 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -253,17 +253,7 @@ PHONY += bootwrapper_install
 bootwrapper_install:
 	$(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 
-# Used to create 'merged defconfigs'
-# To use it $(call) it with the first argument as the base defconfig
-# and the second argument as a space separated list of .config files to merge,
-# without the .config suffix.
-define merge_into_defconfig
-	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
-		-m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
-		$(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
-	+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
-endef
-
+include $(srctree)/scripts/Makefile.defconf
 PHONY += pseries_le_defconfig
 pseries_le_defconfig:
 	$(call merge_into_defconfig,pseries_defconfig,le)
diff --git a/scripts/Makefile.defconf b/scripts/Makefile.defconf
new file mode 100644
index 0000000000000..ab332f7534f51
--- /dev/null
+++ b/scripts/Makefile.defconf
@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: GPL-2.0
+# Configuration heplers
+
+# Creates 'merged defconfigs'
+# ---------------------------------------------------------------------------
+# Usage:
+#   $(call merge_into_defconfig,base_config,config_fragment1 config_fragment2 ...)
+#
+# Input config fragments without '.config' suffix
+define merge_into_defconfig
+	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
+		-m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
+		$(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
+	+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
+endef
-- 
2.34.1

