mtd: add option to build mkfs.ubifs for target

[Thomas: implement simplifications suggested by Thomas De
Schampheleire, add missing 'depends' on required toolchain features.]

Signed-off-by: Paul B. Henson <henson@acm.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/mtd/Config.in

@@ -54,6 +54,18 @@ config BR2_PACKAGE_MTD_MKFSJFFS2
 	select BR2_PACKAGE_ZLIB
 	select BR2_PACKAGE_LZO
 
+config BR2_PACKAGE_MTD_MKFSUBIFS
+	bool "mkfs.ubifs"
+	select BR2_PACKAGE_ZLIB
+	select BR2_PACKAGE_LZO
+	select BR2_PACKAGE_UTIL_LINUX
+	select BR2_PACKAGE_UTIL_LINUX_LIBUUID
+	depends on BR2_LARGEFILE # util-linux
+	depends on BR2_USE_WCHAR # util-linux
+
+comment "mkfs.ubifs requires largefile and wchar support in toolchain"
+	depends on !BR2_LARGEFILE || !BR2_USE_WCHAR
+
 config BR2_PACKAGE_MTD_MTD_DEBUG
 	bool "mtd_debug"
 	default y

package/mtd/mtd.mk

@@ -14,6 +14,10 @@ ifeq ($(BR2_PACKAGE_MTD_MKFSJFFS2),y)
 MTD_DEPENDENCIES = zlib lzo
 endif
 
+ifeq ($(BR2_PACKAGE_MTD_MKFSUBIFS),y)
+MTD_DEPENDENCIES += util-linux zlib lzo
+endif
+
 ifeq ($(BR2_PACKAGE_BUSYBOX),y)
 MTD_DEPENDENCIES += busybox
 endif
@@ -72,6 +76,7 @@ MTD_TARGETS_UBI_$(BR2_PACKAGE_MTD_UBIRSVOL)	+= ubirsvol
 MTD_TARGETS_UBI_$(BR2_PACKAGE_MTD_UBIUPDATEVOL)	+= ubiupdatevol
 
 MTD_TARGETS_y += $(addprefix ubi-utils/,$(MTD_TARGETS_UBI_y))
+MTD_TARGETS_$(BR2_PACKAGE_MTD_MKFSUBIFS) += mkfs.ubifs/mkfs.ubifs
 
 # only call make if atleast a single tool is enabled
 ifneq ($(MTD_TARGETS_y),)