Move all filesystem generation code to fs/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

fs/cpio/Config.in

@@ -0,0 +1,40 @@
+config BR2_TARGET_ROOTFS_CPIO
+	bool "cpio the root filesystem"
+	help
+	  Build a cpio archive of the root filesystem
+
+choice
+        prompt "Compression method"
+        default BR2_TARGET_ROOTFS_CPIO_NONE
+        depends on BR2_TARGET_ROOTFS_CPIO
+        help
+          Select compressor for cpio filesystem of the root filesystem
+
+config BR2_TARGET_ROOTFS_CPIO_NONE
+        bool "no compression"
+        help
+         Do not compress the cpio filesystem.
+
+config BR2_TARGET_ROOTFS_CPIO_GZIP
+        bool "gzip"
+        help
+         Do compress the cpio filesystem with gzip.
+         Note that you either have to have gzip installed on your host
+         or select to build a gzip for your host. See the packages submenu.
+
+config BR2_TARGET_ROOTFS_CPIO_BZIP2
+        bool "bzip2"
+        help
+         Do compress the cpio filesystem with bzip2.
+         Note that you either have to have bzip2 installed on your host
+         or select to build a bzip2 for your host. See the packages submenu.
+
+config BR2_TARGET_ROOTFS_CPIO_LZMA
+        bool "lzma"
+        help
+         Do compress the cpio filesystem with lzma.
+         Note that you either have to have lzma installed on your host
+         or select to build a lzma for your host. See the packages submenu.
+
+endchoice
+

fs/cpio/cpioroot.mk

@@ -0,0 +1,18 @@
+#############################################################
+#
+# cpio to archive target filesystem
+#
+#############################################################
+
+define ROOTFS_CPIO_INIT_SYMLINK
+	rm -f $(TARGET_DIR)/init
+	ln -s sbin/init $(TARGET_DIR)/init
+endef
+
+ROOTFS_CPIO_PRE_GEN_HOOKS += ROOTFS_CPIO_INIT_SYMLINK
+
+define ROOTFS_CPIO_CMD
+	cd $(TARGET_DIR) && find . | cpio --quiet -o -H newc > $$@
+endef
+
+$(eval $(call ROOTFS_TARGET,cpio))