squashfs: re-add legacy lzma support

Readd legacy LZMA support since older patched kernels might be using it.
Introduce an XZ target filesystem option for the new format.

[Peter: add a seperate xz target for squashfs-target as well]
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

fs/squashfs/Config.in

@@ -37,5 +37,8 @@ config BR2_TARGET_ROOTFS_SQUASHFS4_LZMA
 config BR2_TARGET_ROOTFS_SQUASHFS4_LZO
        bool "lzo"
 
+config BR2_TARGET_ROOTFS_SQUASHFS4_XZ
+       bool "xz"
+
 endchoice
 endif

fs/squashfs/squashfs.mk

@@ -11,11 +11,15 @@ ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS4_LZO),y)
 ROOTFS_SQUASHFS_ARGS += -comp lzo
 else
 ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS4_LZMA),y)
+ROOTFS_SQUASHFS_ARGS += -comp lzma
+else
+ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS4_XZ),y)
 ROOTFS_SQUASHFS_ARGS += -comp xz
 else
 ROOTFS_SQUASHFS_ARGS += -comp gzip
 endif
 endif
+endif
 
 else
 ROOTFS_SQUASHFS_DEPENDENCIES = host-squashfs3

package/squashfs/Config.in

@@ -28,6 +28,12 @@ config BR2_PACKAGE_SQUASHFS_LZO
        help
          Support LZO compression algorithm
 
+config BR2_PACKAGE_SQUASHFS_XZ
+       bool "xz support"
+       select BR2_PACKAGE_XZ
+       help
+         Support XZ compression algorithm
+
 endif
 
 comment "squashfs requires a toolchain with LARGEFILE support"

package/squashfs/squashfs.mk

@@ -2,11 +2,18 @@ SQUASHFS_VERSION=4.2
 SQUASHFS_SOURCE=squashfs$(SQUASHFS_VERSION).tar.gz
 SQUASHFS_SITE=http://$(BR2_SOURCEFORGE_MIRROR).dl.sourceforge.net/sourceforge/squashfs
 
-# no libattr/xz in BR
+# no libattr in BR
 SQUASHFS_MAKE_ARGS = XATTR_SUPPORT=0
 
 ifeq ($(BR2_PACKAGE_SQUASHFS_LZMA),y)
 SQUASHFS_DEPENDENCIES += xz
+SQUASHFS_MAKE_ARGS += LZMA_XZ_SUPPORT=1 COMP_DEFAULT=lzma
+else
+SQUASHFS_MAKE_ARGS += LZMA_XZ_SUPPORT=0
+endif
+
+ifeq ($(BR2_PACKAGE_SQUASHFS_XZ),y)
+SQUASHFS_DEPENDENCIES += xz
 SQUASHFS_MAKE_ARGS += XZ_SUPPORT=1 COMP_DEFAULT=xz
 else
 SQUASHFS_MAKE_ARGS += XZ_SUPPORT=0
@@ -34,7 +41,8 @@ HOST_SQUASHFS_MAKE_ARGS = \
 	XATTR_SUPPORT=0 \
 	XZ_SUPPORT=1    \
 	GZIP_SUPPORT=1  \
-	LZO_SUPPORT=1
+	LZO_SUPPORT=1	\
+	LZMA_XZ_SUPPORT=1
 
 define SQUASHFS_BUILD_CMDS
  $(TARGET_MAKE_ENV) $(MAKE)    \