linux-kernel - [RFC PATCH 01/23] arm: add kconfig fragments support

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Message-id: <1481027938-31831-2-git-send-email-b.zolnierkie@samsung.com>
Date:   Tue, 06 Dec 2016 13:38:36 +0100
From:   Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Olof Johansson <olof@...om.net>,
        Russell King <linux@....linux.org.uk>,
        b.zolnierkie@...sung.com, Cyril Bur <cyrilbur@...il.com>
Subject: [RFC PATCH 01/23] arm: add kconfig fragments support

Add support for generating defconfigs from kconfig fragments.

This is based on changes to arch/powerpc/Makefile from
commit ea4d1a87e6de ("powerpc/configs: Replace pseries_le_defconfig
with a Makefile target using merge_config") by Cyril Bur.

Cc: Cyril Bur <cyrilbur@...il.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
---
 arch/arm/Makefile | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 6be9ee1..f2c0683 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -343,6 +343,17 @@ dtbs: prepare scripts
 dtbs_install:
 	$(Q)$(MAKE) $(dtbinst)=$(boot)/dts
 
+# 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 $(srctree)/Makefile olddefconfig
+endef
+
 PHONY += vdso_install
 vdso_install:
 ifeq ($(CONFIG_VDSO),y)
-- 
1.9.1