fs: add option to define path to custom rootfs skeleton

Signed-off-by: Dmytro Milinevskyy <milinevskyy@gmail.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

Makefile

@@ -367,6 +367,10 @@ $(STAGING_DIR):
 	@mkdir -p $(STAGING_DIR)/usr/include
 	@mkdir -p $(STAGING_DIR)/usr/bin
 
+ifeq ($(BR2_ROOTFS_SKELETON_CUSTOM),y)
+TARGET_SKELETON=$(BR2_ROOTFS_SKELETON_CUSTOM_PATH)
+endif
+
 $(BUILD_DIR)/.root:
 	mkdir -p $(TARGET_DIR)
 	if ! [ -d "$(TARGET_DIR)/bin" ]; then \

fs/Config.in

@@ -23,6 +23,29 @@ config BR2_ROOTFS_DEVICE_TABLE
          to the makedevs utility to create all the special device
          files in the target filesystem.
 
+choice
+	prompt "Root FS skeleton"
+
+config BR2_ROOTFS_SKELETON_DEFAULT
+	bool "default target skeleton"
+	help
+	  Use default target skeleton
+
+config BR2_ROOTFS_SKELETON_CUSTOM
+	bool "custom target skeleton"
+	help
+	  Use custom target skeleton.
+
+endchoice
+
+if BR2_ROOTFS_SKELETON_CUSTOM
+config BR2_ROOTFS_SKELETON_CUSTOM_PATH
+	string "custom target skeleton path"
+	default "fs/skeleton"
+	help
+	  Path custom target skeleton.
+endif
+
 source "fs/cramfs/Config.in"
 source "fs/cloop/Config.in"
 source "fs/ext2/Config.in"