From e1b1a18ab63ae3ef4eeb7f7cb4406a9cfbb12035 Mon Sep 17 00:00:00 2001
From: Thomas Petazzoni
Date: Sat, 21 Aug 2010 18:50:44 +0200
Subject: Add support for savedefconfig

savedefconfig allows to create a minimal defconfig file from an
existing configuration. For example :

 make O=/path/to/some/buildroot/build/directory savedefconfig

will generate a minimal 'defconfig' file in the main Buildroot source
directory.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---
 Makefile | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index abe1aa02e..c897db76c 100644
--- a/Makefile
+++ b/Makefile
@@ -29,7 +29,7 @@ CONFIG=package/config
 DATE:=$(shell date +%Y%m%d)
 
 noconfig_targets:=menuconfig nconfig gconfig xconfig config oldconfig randconfig \
-	defconfig %_defconfig allyesconfig allnoconfig release \
+	defconfig %_defconfig savedefconfig allyesconfig allnoconfig release \
 	randpackageconfig allyespackageconfig allnopackageconfig \
 	source-check help
 
@@ -547,6 +547,10 @@ defconfig: $(BUILD_DIR)/buildroot-config/conf
 	@mkdir -p $(BUILD_DIR)/buildroot-config
 	@$(COMMON_CONFIG_ENV) $< --defconfig=$(TOPDIR)/configs/$@ $(CONFIG_CONFIG_IN)
 
+savedefconfig: $(BUILD_DIR)/buildroot-config/conf
+	@mkdir -p $(BUILD_DIR)/buildroot-config
+	@$(COMMON_CONFIG_ENV) $< --savedefconfig=$(TOPDIR)/defconfig $(CONFIG_CONFIG_IN)
+
 # check if download URLs are outdated
 source-check: allyesconfig
 	$(MAKE) $(EXTRAMAKEARGS) _source-check
-- 
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