Merge from bittboy/buildroot@db180c0

support/kconfig/patches/19-merge_config.sh-add-br2-external-support.patch

@@ -0,0 +1,47 @@
+commit 28fac3973b3c693c453594b007c08c1e1e5c4af3
+Author: Ilya Kuzmich <ilya.kuzmich@gmail.com>
+Date: Tue, 9 Jan 2018 14:37:43 +0300
+
+    merge_config.sh: add br2-external support
+
+    Pass BR2_EXTERNAL value via -e option.
+    This will prevent merge_config.sh from silently eating any symbols defined in
+    external trees on a clean buildroot tree invocation.
+
+    Signed-off-by: Ilya Kuzmich <ilya.kuzmich@gmail.com>
+    Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
+    Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
+
+Index: kconfig/merge_config.sh
+===================================================================
+--- kconfig.orig/merge_config.sh
++++ kconfig/merge_config.sh
+@@ -33,6 +33,7 @@ usage() {
+ 	echo "  -n    use allnoconfig instead of alldefconfig"
+ 	echo "  -r    list redundant entries when merging fragments"
+ 	echo "  -O    dir to put generated output files.  Consider setting \$KCONFIG_CONFIG instead."
++	echo "  -e    colon-separated list of br2-external trees to use (optional)"
+ }
+ 
+ RUNMAKE=true
+@@ -71,6 +72,11 @@ while true; do
+ 		shift 2
+ 		continue
+ 		;;
++	"-e")
++		EXTERNAL_ARG="BR2_EXTERNAL=$2"
++		shift 2
++		continue
++		;;
+ 	*)
+ 		break
+ 		;;
+@@ -151,7 +157,7 @@ fi
+ # Use the merged file as the starting point for:
+ # alldefconfig: Fills in any missing symbols with Kconfig default
+ # allnoconfig: Fills in any missing symbols with # CONFIG_* is not set
+-make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET
++make KCONFIG_ALLCONFIG=$TMP_FILE $EXTERNAL_ARG $OUTPUT_ARG $ALLTARGET
+ 
+ 
+ # Check all specified config values took (might have missed-dependency issues)