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

Bartlomiej Zolnierkiewicz
2016-12-06T12:38:36Z

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@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.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