diff --git a/yocto-poky/meta/classes/image.bbclass b/yocto-poky/meta/classes/image.bbclass
index d2f8105..8bfd241 100644
--- a/yocto-poky/meta/classes/image.bbclass
+++ b/yocto-poky/meta/classes/image.bbclass
@@ -1,6 +1,9 @@
 inherit rootfs_${IMAGE_PKGTYPE}
 
-inherit populate_sdk_ext
+# Only Linux SDKs support populate_sdk_ext, fall back to populate_sdk
+# in the non-Linux SDK_OS case, such as mingw32
+SDKEXTCLASS ?= "${@['populate_sdk', 'populate_sdk_ext']['linux' in d.getVar("SDK_OS", True)]}"
+inherit ${SDKEXTCLASS}
 
 TOOLCHAIN_TARGET_TASK += "${PACKAGE_INSTALL}"
 TOOLCHAIN_TARGET_TASK_ATTEMPTONLY += "${PACKAGE_INSTALL_ATTEMPTONLY}"
@@ -30,6 +33,10 @@
 # rootfs bootstrap install
 ROOTFS_BOOTSTRAP_INSTALL = "${@bb.utils.contains("IMAGE_FEATURES", "package-management", "", "${ROOTFS_PKGMANAGE_BOOTSTRAP}",d)}"
 
+# These packages will be removed from a read-only rootfs after all other
+# packages have been installed
+ROOTFS_RO_UNNEEDED = "update-rc.d base-passwd shadow ${VIRTUAL-RUNTIME_update-alternatives} ${ROOTFS_BOOTSTRAP_INSTALL}"
+
 # packages to install from features
 FEATURE_INSTALL = "${@' '.join(oe.packagegroup.required_packages(oe.data.typed_value('IMAGE_FEATURES', d), d))}"
 FEATURE_INSTALL[vardepvalue] = "${FEATURE_INSTALL}"
@@ -94,43 +101,25 @@
 "
 do_rootfs[recrdeptask] += "do_packagedata"
 
-def command_variables(d):
-    return ['ROOTFS_POSTPROCESS_COMMAND','ROOTFS_PREPROCESS_COMMAND','ROOTFS_POSTINSTALL_COMMAND','OPKG_PREPROCESS_COMMANDS','OPKG_POSTPROCESS_COMMANDS','IMAGE_POSTPROCESS_COMMAND',
-            'IMAGE_PREPROCESS_COMMAND','ROOTFS_POSTPROCESS_COMMAND','POPULATE_SDK_POST_HOST_COMMAND','POPULATE_SDK_POST_TARGET_COMMAND','SDK_POSTPROCESS_COMMAND','RPM_PREPROCESS_COMMANDS',         
-            'RPM_POSTPROCESS_COMMANDS']
+def rootfs_command_variables(d):
+    return ['ROOTFS_POSTPROCESS_COMMAND','ROOTFS_PREPROCESS_COMMAND','ROOTFS_POSTINSTALL_COMMAND','ROOTFS_POSTUNINSTALL_COMMAND','OPKG_PREPROCESS_COMMANDS','OPKG_POSTPROCESS_COMMANDS','IMAGE_POSTPROCESS_COMMAND',
+            'IMAGE_PREPROCESS_COMMAND','RPM_PREPROCESS_COMMANDS','RPM_POSTPROCESS_COMMANDS','DEB_PREPROCESS_COMMANDS','DEB_POSTPROCESS_COMMANDS']
 
 python () {
-    variables = command_variables(d)
+    variables = rootfs_command_variables(d) + sdk_command_variables(d)
     for var in variables:
         if d.getVar(var, False):
             d.setVarFlag(var, 'func', '1')
 }
 
-def fstype_variables(d):
-    import oe.image
-
-    image = oe.image.Image(d)
-    alltypes, fstype_groups, cimages = image._get_image_types()
-    fstype_vars = set()
-    for fstype_group in fstype_groups:
-        for fstype in fstype_group:
-            fstype_vars.add('IMAGE_CMD_' + fstype)
-            if fstype in cimages:
-                for ctype in cimages[fstype]:
-                    fstype_vars.add('COMPRESS_CMD_' + ctype)
-
-    return sorted(fstype_vars)
-
 def rootfs_variables(d):
     from oe.rootfs import variable_depends
     variables = ['IMAGE_DEVICE_TABLES','BUILD_IMAGES_FROM_FEEDS','IMAGE_TYPES_MASKED','IMAGE_ROOTFS_ALIGNMENT','IMAGE_OVERHEAD_FACTOR','IMAGE_ROOTFS_SIZE','IMAGE_ROOTFS_EXTRA_SPACE',
-                 'IMAGE_ROOTFS_MAXSIZE','IMAGE_NAME','IMAGE_LINK_NAME','IMAGE_MANIFEST','DEPLOY_DIR_IMAGE','RM_OLD_IMAGE','IMAGE_FSTYPES','IMAGE_INSTALL_COMPLEMENTARY','IMAGE_LINGUAS','SDK_OS',
-                 'SDK_OUTPUT','SDKPATHNATIVE','SDKTARGETSYSROOT','SDK_DIR','SDK_VENDOR','SDKIMAGE_INSTALL_COMPLEMENTARY','SDK_PACKAGE_ARCHS','SDK_OUTPUT','SDKTARGETSYSROOT','MULTILIBRE_ALLOW_REP',
-                 'MULTILIB_TEMP_ROOTFS','MULTILIB_VARIANTS','MULTILIBS','ALL_MULTILIB_PACKAGE_ARCHS','MULTILIB_GLOBAL_VARIANTS','BAD_RECOMMENDATIONS','NO_RECOMMENDATIONS','PACKAGE_ARCHS',
-                 'PACKAGE_CLASSES','TARGET_VENDOR','TARGET_VENDOR','TARGET_ARCH','TARGET_OS','OVERRIDES','BBEXTENDVARIANT','FEED_DEPLOYDIR_BASE_URI','INTERCEPT_DIR','USE_DEVFS',
-                 'COMPRESSIONTYPES', 'IMAGE_GEN_DEBUGFS']
-    variables.extend(fstype_variables(d))
-    variables.extend(command_variables(d))
+                 'IMAGE_ROOTFS_MAXSIZE','IMAGE_NAME','IMAGE_LINK_NAME','IMAGE_MANIFEST','DEPLOY_DIR_IMAGE','RM_OLD_IMAGE','IMAGE_FSTYPES','IMAGE_INSTALL_COMPLEMENTARY','IMAGE_LINGUAS',
+                 'MULTILIBRE_ALLOW_REP','MULTILIB_TEMP_ROOTFS','MULTILIB_VARIANTS','MULTILIBS','ALL_MULTILIB_PACKAGE_ARCHS','MULTILIB_GLOBAL_VARIANTS','BAD_RECOMMENDATIONS','NO_RECOMMENDATIONS',
+                 'PACKAGE_ARCHS','PACKAGE_CLASSES','TARGET_VENDOR','TARGET_ARCH','TARGET_OS','OVERRIDES','BBEXTENDVARIANT','FEED_DEPLOYDIR_BASE_URI','INTERCEPT_DIR','USE_DEVFS',
+                 'COMPRESSIONTYPES', 'IMAGE_GEN_DEBUGFS', 'ROOTFS_RO_UNNEEDED']
+    variables.extend(rootfs_command_variables(d))
     variables.extend(variable_depends(d))
     return " ".join(variables)
 
@@ -183,7 +172,7 @@
     initramfs_image = d.getVar('INITRAMFS_IMAGE', True) or ""
     if initramfs_image != "":
         d.appendVarFlag('do_build', 'depends', " %s:do_bundle_initramfs" %  d.getVar('PN', True))
-        d.appendVarFlag('do_bundle_initramfs', 'depends', " %s:do_rootfs" % initramfs_image)
+        d.appendVarFlag('do_bundle_initramfs', 'depends', " %s:do_image_complete" % initramfs_image)
 }
 
 IMAGE_CLASSES += "image_types"
@@ -191,32 +180,6 @@
 
 IMAGE_POSTPROCESS_COMMAND ?= ""
 
-# Zap the root password if debug-tweaks feature is not enabled
-ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains_any("IMAGE_FEATURES", [ 'debug-tweaks', 'empty-root-password' ], "", "zap_empty_root_password ; ",d)}'
-
-# Allow dropbear/openssh to accept logins from accounts with an empty password string if debug-tweaks is enabled
-ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains_any("IMAGE_FEATURES", [ 'debug-tweaks', 'allow-empty-password' ], "ssh_allow_empty_password; ", "",d)}'
-
-# Enable postinst logging if debug-tweaks is enabled
-ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains_any("IMAGE_FEATURES", [ 'debug-tweaks', 'post-install-logging' ], "postinst_enable_logging; ", "",d)}'
-
-# Create /etc/timestamp during image construction to give a reasonably sane default time setting
-ROOTFS_POSTPROCESS_COMMAND += "rootfs_update_timestamp ; "
-
-# Tweak the mount options for rootfs in /etc/fstab if read-only-rootfs is enabled
-ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("IMAGE_FEATURES", "read-only-rootfs", "read_only_rootfs_hook; ", "",d)}'
-
-# Write manifest
-IMAGE_MANIFEST = "${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.manifest"
-ROOTFS_POSTUNINSTALL_COMMAND =+ "write_image_manifest ; "
-# Set default postinst log file
-POSTINST_LOGFILE ?= "${localstatedir}/log/postinstall.log"
-# Set default target for systemd images
-SYSTEMD_DEFAULT_TARGET ?= '${@bb.utils.contains("IMAGE_FEATURES", "x11-base", "graphical.target", "multi-user.target", d)}'
-ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("DISTRO_FEATURES", "systemd", "set_systemd_default_target; ", "", d)}'
-
-ROOTFS_POSTPROCESS_COMMAND += 'empty_var_volatile;'
-
 # some default locales
 IMAGE_LINGUAS ?= "de-de fr-fr en-gb"
 
@@ -226,80 +189,16 @@
 # aren't yet available.
 PSEUDO_PASSWD = "${IMAGE_ROOTFS}:${STAGING_DIR_NATIVE}"
 
-do_rootfs[dirs] = "${TOPDIR}"
-do_rootfs[lockfiles] += "${IMAGE_ROOTFS}.lock"
-do_rootfs[cleandirs] += "${S}"
-
-# Must call real_do_rootfs() from inside here, rather than as a separate
-# task, so that we have a single fakeroot context for the whole process.
-do_rootfs[umask] = "022"
-
-# A hook function to support read-only-rootfs IMAGE_FEATURES
-read_only_rootfs_hook () {
-	# Tweak the mount option and fs_passno for rootfs in fstab
-	sed -i -e '/^[#[:space:]]*\/dev\/root/{s/defaults/ro/;s/\([[:space:]]*[[:digit:]]\)\([[:space:]]*\)[[:digit:]]$/\1\20/}' ${IMAGE_ROOTFS}/etc/fstab
-
-	# If we're using openssh and the /etc/ssh directory has no pre-generated keys,
-	# we should configure openssh to use the configuration file /etc/ssh/sshd_config_readonly
-	# and the keys under /var/run/ssh.
-	if [ -d ${IMAGE_ROOTFS}/etc/ssh ]; then
-		if [ -e ${IMAGE_ROOTFS}/etc/ssh/ssh_host_rsa_key ]; then
-			echo "SYSCONFDIR=/etc/ssh" >> ${IMAGE_ROOTFS}/etc/default/ssh
-			echo "SSHD_OPTS=" >> ${IMAGE_ROOTFS}/etc/default/ssh
-		else
-			echo "SYSCONFDIR=/var/run/ssh" >> ${IMAGE_ROOTFS}/etc/default/ssh
-			echo "SSHD_OPTS='-f /etc/ssh/sshd_config_readonly'" >> ${IMAGE_ROOTFS}/etc/default/ssh
-		fi
-	fi
-
-	# Also tweak the key location for dropbear in the same way.
-	if [ -d ${IMAGE_ROOTFS}/etc/dropbear ]; then
-		if [ -e ${IMAGE_ROOTFS}/etc/dropbear/dropbear_rsa_host_key ]; then
-			echo "DROPBEAR_RSAKEY_DIR=/etc/dropbear" >> ${IMAGE_ROOTFS}/etc/default/dropbear
-		else
-			echo "DROPBEAR_RSAKEY_DIR=/var/lib/dropbear" >> ${IMAGE_ROOTFS}/etc/default/dropbear
-		fi
-	fi
-
-
-	if ${@bb.utils.contains("DISTRO_FEATURES", "sysvinit", "true", "false", d)}; then
-		# Change the value of ROOTFS_READ_ONLY in /etc/default/rcS to yes
-		if [ -e ${IMAGE_ROOTFS}/etc/default/rcS ]; then
-			sed -i 's/ROOTFS_READ_ONLY=no/ROOTFS_READ_ONLY=yes/' ${IMAGE_ROOTFS}/etc/default/rcS
-		fi
-		# Run populate-volatile.sh at rootfs time to set up basic files
-		# and directories to support read-only rootfs.
-		if [ -x ${IMAGE_ROOTFS}/etc/init.d/populate-volatile.sh ]; then
-			${IMAGE_ROOTFS}/etc/init.d/populate-volatile.sh
-		fi
-	fi
-
-	if ${@bb.utils.contains("DISTRO_FEATURES", "systemd", "true", "false", d)}; then
-	    # Update user database files so that services don't fail for a read-only systemd system
-	    for conffile in ${IMAGE_ROOTFS}/usr/lib/sysusers.d/systemd.conf ${IMAGE_ROOTFS}/usr/lib/sysusers.d/systemd-remote.conf; do
-		[ -e $conffile ] || continue
-		grep -v "^#" $conffile | sed -e '/^$/d' | while read type name id comment; do
-		    if [ "$type" = "u" ]; then
-			useradd_params=""
-			[ "$id" != "-" ] && useradd_params="$useradd_params --uid $id"
-			[ "$comment" != "-" ] && useradd_params="$useradd_params --comment $comment"
-			useradd_params="$useradd_params --system $name"
-			eval useradd --root ${IMAGE_ROOTFS} $useradd_params || true
-		    elif [ "$type" = "g" ]; then
-			groupadd_params=""
-			[ "$id" != "-" ] && groupadd_params="$groupadd_params --gid $id"
-			groupadd_params="$groupadd_params --system $name"
-			eval groupadd --root ${IMAGE_ROOTFS} $groupadd_params || true
-		    fi
-		done
-	    done
-	fi
-}
+inherit rootfs-postcommands
 
 PACKAGE_EXCLUDE ??= ""
 PACKAGE_EXCLUDE[type] = "list"
 
-python rootfs_process_ignore() {
+fakeroot python do_rootfs () {
+    from oe.rootfs import create_rootfs
+    from oe.manifest import create_manifest
+
+    # Handle package exclusions
     excl_pkgs = d.getVar("PACKAGE_EXCLUDE", True).split()
     inst_pkgs = d.getVar("PACKAGE_INSTALL", True).split()
     inst_attempt_pkgs = d.getVar("PACKAGE_INSTALL_ATTEMPTONLY", True).split()
@@ -318,194 +217,312 @@
 
     d.setVar("PACKAGE_INSTALL", ' '.join(inst_pkgs))
     d.setVar("PACKAGE_INSTALL_ATTEMPTONLY", ' '.join(inst_attempt_pkgs))
-}
-do_rootfs[prefuncs] += "rootfs_process_ignore"
 
-# We have to delay the runtime_mapping_rename until just before rootfs runs
-# otherwise, the multilib renaming could step in and squash any fixups that
-# may have occurred.
-python rootfs_runtime_mapping() {
+    # Ensure we handle package name remapping
+    # We have to delay the runtime_mapping_rename until just before rootfs runs
+    # otherwise, the multilib renaming could step in and squash any fixups that
+    # may have occurred.
     pn = d.getVar('PN', True)
     runtime_mapping_rename("PACKAGE_INSTALL", pn, d)
     runtime_mapping_rename("PACKAGE_INSTALL_ATTEMPTONLY", pn, d)
     runtime_mapping_rename("BAD_RECOMMENDATIONS", pn, d)
-}
-do_rootfs[prefuncs] += "rootfs_runtime_mapping"
 
-fakeroot python do_rootfs () {
-    from oe.rootfs import create_rootfs
-    from oe.image import create_image
-    from oe.manifest import create_manifest
-
-    # generate the initial manifest
+    # Generate the initial manifest
     create_manifest(d)
 
-    # generate rootfs
+    # Generate rootfs
     create_rootfs(d)
+}
+do_rootfs[dirs] = "${TOPDIR}"
+do_rootfs[cleandirs] += "${S}"
+do_rootfs[umask] = "022"
+addtask rootfs before do_build
 
-    # generate final images
-    create_image(d)
+fakeroot python do_image () {
+    from oe.utils import execute_pre_post_process
+
+    pre_process_cmds = d.getVar("IMAGE_PREPROCESS_COMMAND", True)
+
+    execute_pre_post_process(d, pre_process_cmds)
+}
+do_image[dirs] = "${TOPDIR}"
+do_image[umask] = "022"
+addtask do_image after do_rootfs before do_build
+
+fakeroot python do_image_complete () {
+    from oe.utils import execute_pre_post_process
+
+    post_process_cmds = d.getVar("IMAGE_POSTPROCESS_COMMAND", True)
+
+    execute_pre_post_process(d, post_process_cmds)
+}
+do_image_complete[dirs] = "${TOPDIR}"
+do_image_complete[umask] = "022"
+addtask do_image_complete after do_image before do_build
+
+#
+# Write environment variables used by wic
+# to tmp/sysroots/<machine>/imgdata/<image>.env
+#
+python do_rootfs_wicenv () {
+    wicvars = d.getVar('WICVARS', True)
+    if not wicvars:
+        return
+
+    stdir = d.getVar('STAGING_DIR_TARGET', True)
+    outdir = os.path.join(stdir, 'imgdata')
+    bb.utils.mkdirhier(outdir)
+    basename = d.getVar('IMAGE_BASENAME', True)
+    with open(os.path.join(outdir, basename) + '.env', 'w') as envf:
+        for var in wicvars.split():
+            value = d.getVar(var, True)
+            if value:
+                envf.write('%s="%s"\n' % (var, value.strip()))
+}
+addtask do_rootfs_wicenv after do_image before do_image_wic
+do_rootfs_wicenv[vardeps] += "${WICVARS}"
+do_rootfs_wicenv[prefuncs] = 'set_image_size'
+
+def setup_debugfs_variables(d):
+    d.appendVar('IMAGE_ROOTFS', '-dbg')
+    d.appendVar('IMAGE_LINK_NAME', '-dbg')
+    d.appendVar('IMAGE_NAME','-dbg')
+    debugfs_image_fstypes = d.getVar('IMAGE_FSTYPES_DEBUGFS', True)
+    if debugfs_image_fstypes:
+        d.setVar('IMAGE_FSTYPES', debugfs_image_fstypes)
+
+python setup_debugfs () {
+    setup_debugfs_variables(d)
 }
 
-insert_feed_uris () {
-	
-	echo "Building feeds for [${DISTRO}].."
+python () {
+    vardeps = set()
+    ctypes = d.getVar('COMPRESSIONTYPES', True).split()
+    old_overrides = d.getVar('OVERRIDES', 0)
 
-	for line in ${FEED_URIS}
-	do
-		# strip leading and trailing spaces/tabs, then split into name and uri
-		line_clean="`echo "$line"|sed 's/^[ \t]*//;s/[ \t]*$//'`"
-		feed_name="`echo "$line_clean" | sed -n 's/\(.*\)##\(.*\)/\1/p'`"
-		feed_uri="`echo "$line_clean" | sed -n 's/\(.*\)##\(.*\)/\2/p'`"
-		
-		echo "Added $feed_name feed with URL $feed_uri"
-		
-		# insert new feed-sources
-		echo "src/gz $feed_name $feed_uri" >> ${IMAGE_ROOTFS}/etc/opkg/${feed_name}-feed.conf
-	done
+    def _image_base_type(type):
+        basetype = type
+        for ctype in ctypes:
+            if type.endswith("." + ctype):
+                basetype = type[:-len("." + ctype)]
+                break
+
+        if basetype != type:
+            # New base type itself might be generated by a conversion command.
+            basetype = _image_base_type(basetype)
+
+        return basetype
+
+    basetypes = {}
+    alltypes = d.getVar('IMAGE_FSTYPES', True).split()
+    typedeps = {}
+
+    if d.getVar('IMAGE_GEN_DEBUGFS', True) == "1":
+        debugfs_fstypes = d.getVar('IMAGE_FSTYPES_DEBUGFS', True).split()
+        for t in debugfs_fstypes:
+            alltypes.append("debugfs_" + t)
+
+    def _add_type(t):
+        baset = _image_base_type(t)
+        input_t = t
+        if baset not in basetypes:
+            basetypes[baset]= []
+        if t not in basetypes[baset]:
+            basetypes[baset].append(t)
+        debug = ""
+        if t.startswith("debugfs_"):
+            t = t[8:]
+            debug = "debugfs_"
+        deps = (d.getVar('IMAGE_TYPEDEP_' + t, True) or "").split()
+        vardeps.add('IMAGE_TYPEDEP_' + t)
+        if baset not in typedeps:
+            typedeps[baset] = set()
+        deps = [debug + dep for dep in deps]
+        for dep in deps:
+            if dep not in alltypes:
+                alltypes.append(dep)
+            _add_type(dep)
+            basedep = _image_base_type(dep)
+            typedeps[baset].add(basedep)
+
+        if baset != input_t:
+            _add_type(baset)
+
+    for t in alltypes[:]:
+        _add_type(t)
+
+    d.appendVarFlag('do_image', 'vardeps', ' '.join(vardeps))
+
+    maskedtypes = (d.getVar('IMAGE_TYPES_MASKED', True) or "").split()
+
+    for t in basetypes:
+        vardeps = set()
+        cmds = []
+        subimages = []
+        realt = t
+
+        if t in maskedtypes:
+            continue
+
+        localdata = bb.data.createCopy(d)
+        debug = ""
+        if t.startswith("debugfs_"):
+            setup_debugfs_variables(localdata)
+            debug = "setup_debugfs "
+            realt = t[8:]
+        localdata.setVar('OVERRIDES', '%s:%s' % (realt, old_overrides))
+        bb.data.update_data(localdata)
+        localdata.setVar('type', realt)
+        # Delete DATETIME so we don't expand any references to it now
+        # This means the task's hash can be stable rather than having hardcoded
+        # date/time values. It will get expanded at execution time.
+        # Similarly TMPDIR since otherwise we see QA stamp comparision problems
+        localdata.delVar('DATETIME')
+        localdata.delVar('TMPDIR')
+
+        image_cmd = localdata.getVar("IMAGE_CMD", True)
+        vardeps.add('IMAGE_CMD_' + realt)
+        if image_cmd:
+            cmds.append("\t" + image_cmd)
+        else:
+            bb.fatal("No IMAGE_CMD defined for IMAGE_FSTYPES entry '%s' - possibly invalid type name or missing support class" % t)
+        cmds.append(localdata.expand("\tcd ${DEPLOY_DIR_IMAGE}"))
+
+        rm_tmp_images = set()
+        def gen_conversion_cmds(bt):
+            for ctype in ctypes:
+                if bt.endswith("." + ctype):
+                    type = bt[0:-len(ctype) - 1]
+                    if type.startswith("debugfs_"):
+                        type = type[8:]
+                    # Create input image first.
+                    gen_conversion_cmds(type)
+                    localdata.setVar('type', type)
+                    cmds.append("\t" + localdata.getVar("COMPRESS_CMD_" + ctype, True))
+                    vardeps.add('COMPRESS_CMD_' + ctype)
+                    subimages.append(type + "." + ctype)
+                    if type not in alltypes:
+                        rm_tmp_images.add(localdata.expand("${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.${type}"))
+
+        for bt in basetypes[t]:
+            gen_conversion_cmds(bt)
+
+        localdata.setVar('type', realt)
+        if t not in alltypes:
+            rm_tmp_images.add(localdata.expand("${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.${type}"))
+        else:
+            subimages.append(realt)
+
+        # Clean up after applying all conversion commands. Some of them might
+        # use the same input, therefore we cannot delete sooner without applying
+        # some complex dependency analysis.
+        for image in rm_tmp_images:
+            cmds.append("\trm " + image)
+
+        after = 'do_image'
+        for dep in typedeps[t]:
+            after += ' do_image_%s' % dep.replace("-", "_").replace(".", "_")
+
+        t = t.replace("-", "_").replace(".", "_")
+
+        d.setVar('do_image_%s' % t, '\n'.join(cmds))
+        d.setVarFlag('do_image_%s' % t, 'func', '1')
+        d.setVarFlag('do_image_%s' % t, 'fakeroot', '1')
+        d.setVarFlag('do_image_%s' % t, 'prefuncs', debug + 'set_image_size')
+        d.setVarFlag('do_image_%s' % t, 'postfuncs', 'create_symlinks')
+        d.setVarFlag('do_image_%s' % t, 'subimages', ' '.join(subimages))
+        d.appendVarFlag('do_image_%s' % t, 'vardeps', ' '.join(vardeps))
+        d.appendVarFlag('do_image_%s' % t, 'vardepsexclude', 'DATETIME')
+
+        bb.debug(2, "Adding type %s before %s, after %s" % (t, 'do_image_complete', after))
+        bb.build.addtask('do_image_%s' % t, 'do_image_complete', after, d)
+}
+
+#
+# Compute the rootfs size
+#
+def get_rootfs_size(d):
+    import subprocess
+
+    rootfs_alignment = int(d.getVar('IMAGE_ROOTFS_ALIGNMENT', True))
+    overhead_factor = float(d.getVar('IMAGE_OVERHEAD_FACTOR', True))
+    rootfs_req_size = int(d.getVar('IMAGE_ROOTFS_SIZE', True))
+    rootfs_extra_space = eval(d.getVar('IMAGE_ROOTFS_EXTRA_SPACE', True))
+    rootfs_maxsize = d.getVar('IMAGE_ROOTFS_MAXSIZE', True)
+    image_fstypes = d.getVar('IMAGE_FSTYPES', True) or ''
+    initramfs_fstypes = d.getVar('INITRAMFS_FSTYPES', True) or ''
+    initramfs_maxsize = d.getVar('INITRAMFS_MAXSIZE', True)
+
+    output = subprocess.check_output(['du', '-ks',
+                                      d.getVar('IMAGE_ROOTFS', True)])
+    size_kb = int(output.split()[0])
+    base_size = size_kb * overhead_factor
+    base_size = max(base_size, rootfs_req_size) + rootfs_extra_space
+
+    if base_size != int(base_size):
+        base_size = int(base_size + 1)
+    else:
+        base_size = int(base_size)
+
+    base_size += rootfs_alignment - 1
+    base_size -= base_size % rootfs_alignment
+
+    # Check the rootfs size against IMAGE_ROOTFS_MAXSIZE (if set)
+    if rootfs_maxsize:
+        rootfs_maxsize_int = int(rootfs_maxsize)
+        if base_size > rootfs_maxsize_int:
+            bb.fatal("The rootfs size %d(K) overrides IMAGE_ROOTFS_MAXSIZE: %d(K)" % \
+                (base_size, rootfs_maxsize_int))
+
+    # Check the initramfs size against INITRAMFS_MAXSIZE (if set)
+    if image_fstypes == initramfs_fstypes != ''  and initramfs_maxsize:
+        initramfs_maxsize_int = int(initramfs_maxsize)
+        if base_size > initramfs_maxsize_int:
+            bb.error("The initramfs size %d(K) overrides INITRAMFS_MAXSIZE: %d(K)" % \
+                (base_size, initramfs_maxsize_int))
+            bb.error("You can set INITRAMFS_MAXSIZE a larger value. Usually, it should")
+            bb.fatal("be less than 1/2 of ram size, or you may fail to boot it.\n")
+    return base_size
+
+python set_image_size () {
+        rootfs_size = get_rootfs_size(d)
+        d.setVar('ROOTFS_SIZE', str(rootfs_size))
+        d.setVarFlag('ROOTFS_SIZE', 'export', '1')
+}
+
+#
+# Create symlinks to the newly created image
+#
+python create_symlinks() {
+
+    deploy_dir = d.getVar('DEPLOY_DIR_IMAGE', True)
+    img_name = d.getVar('IMAGE_NAME', True)
+    link_name = d.getVar('IMAGE_LINK_NAME', True)
+    manifest_name = d.getVar('IMAGE_MANIFEST', True)
+    taskname = d.getVar("BB_CURRENTTASK", True)
+    subimages = (d.getVarFlag("do_" + taskname, 'subimages', False) or "").split()
+    imgsuffix = d.getVarFlag("do_" + taskname, 'imgsuffix', True) or d.expand("${IMAGE_NAME_SUFFIX}.")
+    os.chdir(deploy_dir)
+
+    if not link_name:
+        return
+    for type in subimages:
+        if os.path.exists(img_name + imgsuffix + type):
+            dst = deploy_dir + "/" + link_name + "." + type
+            src = img_name + imgsuffix + type
+            bb.note("Creating symlink: %s -> %s" % (dst, src))
+            if os.path.islink(dst):
+                if d.getVar('RM_OLD_IMAGE', True) == "1" and \
+                        os.path.exists(os.path.realpath(dst)):
+                    os.remove(os.path.realpath(dst))
+                os.remove(dst)
+            os.symlink(src, dst)
 }
 
 MULTILIBRE_ALLOW_REP =. "${base_bindir}|${base_sbindir}|${bindir}|${sbindir}|${libexecdir}|${sysconfdir}|${nonarch_base_libdir}/udev|/lib/modules/[^/]*/modules.*|"
 MULTILIB_CHECK_FILE = "${WORKDIR}/multilib_check.py"
 MULTILIB_TEMP_ROOTFS = "${WORKDIR}/multilib"
 
-# This function is intended to disallow empty root password if 'debug-tweaks' is not in IMAGE_FEATURES.
-zap_empty_root_password () {
-	if [ -e ${IMAGE_ROOTFS}/etc/shadow ]; then
-		sed -i 's%^root::%root:*:%' ${IMAGE_ROOTFS}/etc/shadow
-        fi
-	if [ -e ${IMAGE_ROOTFS}/etc/passwd ]; then
-		sed -i 's%^root::%root:*:%' ${IMAGE_ROOTFS}/etc/passwd
-	fi
-} 
-
-# allow dropbear/openssh to accept root logins and logins from accounts with an empty password string
-ssh_allow_empty_password () {
-	if [ -e ${IMAGE_ROOTFS}${sysconfdir}/ssh/sshd_config ]; then
-		sed -i 's/^[#[:space:]]*PermitRootLogin.*/PermitRootLogin yes/' ${IMAGE_ROOTFS}${sysconfdir}/ssh/sshd_config
-		sed -i 's/^[#[:space:]]*PermitEmptyPasswords.*/PermitEmptyPasswords yes/' ${IMAGE_ROOTFS}${sysconfdir}/ssh/sshd_config
-	fi
-
-	if [ -e ${IMAGE_ROOTFS}${sbindir}/dropbear ] ; then
-		if grep -q DROPBEAR_EXTRA_ARGS ${IMAGE_ROOTFS}${sysconfdir}/default/dropbear 2>/dev/null ; then
-			if ! grep -q "DROPBEAR_EXTRA_ARGS=.*-B" ${IMAGE_ROOTFS}${sysconfdir}/default/dropbear ; then
-				sed -i 's/^DROPBEAR_EXTRA_ARGS="*\([^"]*\)"*/DROPBEAR_EXTRA_ARGS="\1 -B"/' ${IMAGE_ROOTFS}${sysconfdir}/default/dropbear
-			fi
-		else
-			printf '\nDROPBEAR_EXTRA_ARGS="-B"\n' >> ${IMAGE_ROOTFS}${sysconfdir}/default/dropbear
-		fi
-	fi
-
-	if [ -d ${IMAGE_ROOTFS}${sysconfdir}/pam.d ] ; then
-		sed -i 's/nullok_secure/nullok/' ${IMAGE_ROOTFS}${sysconfdir}/pam.d/*
-	fi
-}
-
-# Disable DNS lookups, the SSH_DISABLE_DNS_LOOKUP can be overridden to allow
-# distros to choose not to take this change
-SSH_DISABLE_DNS_LOOKUP ?= " ssh_disable_dns_lookup ; "
-ROOTFS_POSTPROCESS_COMMAND_append_qemuall = "${SSH_DISABLE_DNS_LOOKUP}"
-ssh_disable_dns_lookup () {
-	if [ -e ${IMAGE_ROOTFS}${sysconfdir}/ssh/sshd_config ]; then
-		sed -i -e 's:#UseDNS yes:UseDNS no:' ${IMAGE_ROOTFS}${sysconfdir}/ssh/sshd_config
-	fi
-}
-
-# Enable postinst logging if debug-tweaks is enabled
-postinst_enable_logging () {
-	mkdir -p ${IMAGE_ROOTFS}${sysconfdir}/default
-	echo "POSTINST_LOGGING=1" >> ${IMAGE_ROOTFS}${sysconfdir}/default/postinst
-	echo "LOGFILE=${POSTINST_LOGFILE}" >> ${IMAGE_ROOTFS}${sysconfdir}/default/postinst
-}
-
-# Modify systemd default target
-set_systemd_default_target () {
-	if [ -d ${IMAGE_ROOTFS}${sysconfdir}/systemd/system -a -e ${IMAGE_ROOTFS}${systemd_unitdir}/system/${SYSTEMD_DEFAULT_TARGET} ]; then
-		ln -sf ${systemd_unitdir}/system/${SYSTEMD_DEFAULT_TARGET} ${IMAGE_ROOTFS}${sysconfdir}/systemd/system/default.target
-	fi
-}
-
-# If /var/volatile is not empty, we have seen problems where programs such as the
-# journal make assumptions based on the contents of /var/volatile. The journal
-# would then write to /var/volatile before it was mounted, thus hiding the
-# items previously written.
-#
-# This change is to attempt to fix those types of issues in a way that doesn't
-# affect users that may not be using /var/volatile.
-empty_var_volatile () {
-	if [ -e ${IMAGE_ROOTFS}/etc/fstab ]; then
-		match=`awk '$1 !~ "#" && $2 ~ /\/var\/volatile/{print $2}' ${IMAGE_ROOTFS}/etc/fstab 2> /dev/null`
-		if [ -n "$match" ]; then
-			find ${IMAGE_ROOTFS}/var/volatile -mindepth 1 -delete
-		fi
-	fi
-}
-
-# Turn any symbolic /sbin/init link into a file
-remove_init_link () {
-	if [ -h ${IMAGE_ROOTFS}/sbin/init ]; then
-		LINKFILE=${IMAGE_ROOTFS}`readlink ${IMAGE_ROOTFS}/sbin/init`
-		rm ${IMAGE_ROOTFS}/sbin/init
-		cp $LINKFILE ${IMAGE_ROOTFS}/sbin/init
-	fi
-}
-
-make_zimage_symlink_relative () {
-	if [ -L ${IMAGE_ROOTFS}/boot/zImage ]; then
-		(cd ${IMAGE_ROOTFS}/boot/ && for i in `ls zImage-* | sort`; do ln -sf $i zImage; done)
-	fi
-}
-
-python write_image_manifest () {
-    from oe.rootfs import image_list_installed_packages
-    with open(d.getVar('IMAGE_MANIFEST', True), 'w+') as image_manifest:
-        image_manifest.write(image_list_installed_packages(d, 'ver'))
-        image_manifest.write("\n")
-}
-
-# Can be use to create /etc/timestamp during image construction to give a reasonably 
-# sane default time setting
-rootfs_update_timestamp () {
-	date -u +%4Y%2m%2d%2H%2M%2S >${IMAGE_ROOTFS}/etc/timestamp
-}
-
-# Prevent X from being started
-rootfs_no_x_startup () {
-	if [ -f ${IMAGE_ROOTFS}/etc/init.d/xserver-nodm ]; then
-		chmod a-x ${IMAGE_ROOTFS}/etc/init.d/xserver-nodm
-	fi
-}
-
-rootfs_trim_schemas () {
-	for schema in ${IMAGE_ROOTFS}/etc/gconf/schemas/*.schemas
-	do
-		# Need this in case no files exist
-		if [ -e $schema ]; then
-			oe-trim-schemas $schema > $schema.new
-			mv $schema.new $schema
-		fi
-	done
-}
-
-rootfs_check_host_user_contaminated () {
-	contaminated="${WORKDIR}/host-user-contaminated.txt"
-	HOST_USER_UID="$(PSEUDO_UNLOAD=1 id -u)"
-	HOST_USER_GID="$(PSEUDO_UNLOAD=1 id -g)"
-
-	find "${IMAGE_ROOTFS}" -wholename "${IMAGE_ROOTFS}/home" -prune \
-	    -user "$HOST_USER_UID" -o -group "$HOST_USER_GID" >"$contaminated"
-
-	if [ -s "$contaminated" ]; then
-		echo "WARNING: Paths in the rootfs are owned by the same user or group as the user running bitbake. See the logfile for the specific paths."
-		cat "$contaminated" | sed "s,^,  ,"
-	fi
-}
-
-# Make any absolute links in a sysroot relative
-rootfs_sysroot_relativelinks () {
-	sysroot-relativelinks.py ${SDK_OUTPUT}/${SDKTARGETSYSROOT}
-}
-
 do_fetch[noexec] = "1"
 do_unpack[noexec] = "1"
 do_patch[noexec] = "1"
@@ -520,7 +537,6 @@
 do_package_write_deb[noexec] = "1"
 do_package_write_rpm[noexec] = "1"
 
-addtask rootfs before do_build
 # Allow the kernel to be repacked with the initramfs and boot image file as a single file
 do_bundle_initramfs[depends] += "virtual/kernel:do_bundle_initramfs"
 do_bundle_initramfs[nostamp] = "1"
@@ -528,4 +544,4 @@
 do_bundle_initramfs () {
 	:
 }
-addtask bundle_initramfs after do_rootfs
+addtask bundle_initramfs after do_image_complete