added list-defconfigs and %_defconfig

Makefile

@@ -1,3 +1,6 @@
+TOPDIR := $(CURDIR)
+DEFCONFIGS_DIR := $(CURDIR)/configs
+
 nconfig:
 	kconfig-nconf Config.in
 
@@ -12,15 +15,16 @@ py-menuconfig:
 
 include scripts/funcs.mk
 include package/package.mk
+include support/config/config.mk
 
 Command := $(firstword $(MAKECMDGOALS))
 
 UC = $(shell echo $(Command) | tr '[:lower:]' '[:upper:]')
 
-$(Command):
-	$(call CMD_CONFIGURE_$(call UC))
-	$(call CMD_BUILD_$(call UC))
-	$(call CMD_INSTALL_$(call UC))
+# $(Command):
+# 	$(call CMD_CONFIGURE_$(call UC))
+# 	$(call CMD_BUILD_$(call UC))
+# 	$(call CMD_INSTALL_$(call UC))
 
 all:
 	$(call CMD_CONFIGURE_UCLIBC)
@@ -48,4 +52,16 @@ endif
 	$(call CMD_BUILD_UBOOT)
 	$(call CMD_INSTALL_UBOOT)
 
-	
+list-defconfigs:
+	$(call list-defconfigs,$(TOPDIR))
+
+%_defconfig:
+	$(call msg,Copy defconfig: $@ to .config)
+	$(if \
+		$(wildcard $(DEFCONFIGS_DIR)/$@),\
+		$(call copy_file,$(DEFCONFIGS_DIR)/$@,$(TOPDIR)/.config),\
+		$(call errmsg,Can't find $@)\
+	)
+	$(call successmsg,Copy defconfig: $@ to .config is OK)
+
+.PHONY: %_defconfig