diff --git a/meta/classes/base.bbclass b/meta/classes/base.bbclass
new file mode 100644
index 0000000..f078001
--- /dev/null
+++ b/meta/classes/base.bbclass
@@ -0,0 +1,629 @@
+BB_DEFAULT_TASK ?= "build"
+CLASSOVERRIDE ?= "class-target"
+
+inherit patch
+inherit staging
+
+inherit mirrors
+inherit utils
+inherit utility-tasks
+inherit metadata_scm
+inherit logging
+
+OE_IMPORTS += "os sys time oe.path oe.utils oe.data oe.package oe.packagegroup oe.sstatesig oe.lsb oe.cachedpath"
+OE_IMPORTS[type] = "list"
+
+def oe_import(d):
+    import sys
+
+    bbpath = d.getVar("BBPATH", True).split(":")
+    sys.path[0:0] = [os.path.join(dir, "lib") for dir in bbpath]
+
+    def inject(name, value):
+        """Make a python object accessible from the metadata"""
+        if hasattr(bb.utils, "_context"):
+            bb.utils._context[name] = value
+        else:
+            __builtins__[name] = value
+
+    import oe.data
+    for toimport in oe.data.typed_value("OE_IMPORTS", d):
+        imported = __import__(toimport)
+        inject(toimport.split(".", 1)[0], imported)
+
+    return ""
+
+# We need the oe module name space early (before INHERITs get added)
+OE_IMPORTED := "${@oe_import(d)}"
+
+def lsb_distro_identifier(d):
+    adjust = d.getVar('LSB_DISTRO_ADJUST', True)
+    adjust_func = None
+    if adjust:
+        try:
+            adjust_func = globals()[adjust]
+        except KeyError:
+            pass
+    return oe.lsb.distro_identifier(adjust_func)
+
+die() {
+	bbfatal_log "$*"
+}
+
+oe_runmake_call() {
+	bbnote ${MAKE} ${EXTRA_OEMAKE} "$@"
+	${MAKE} ${EXTRA_OEMAKE} "$@"
+}
+
+oe_runmake() {
+	oe_runmake_call "$@" || die "oe_runmake failed"
+}
+
+
+def base_dep_prepend(d):
+    #
+    # Ideally this will check a flag so we will operate properly in
+    # the case where host == build == target, for now we don't work in
+    # that case though.
+    #
+
+    deps = ""
+    # INHIBIT_DEFAULT_DEPS doesn't apply to the patch command.  Whether or  not
+    # we need that built is the responsibility of the patch function / class, not
+    # the application.
+    if not d.getVar('INHIBIT_DEFAULT_DEPS', False):
+        if (d.getVar('HOST_SYS', True) != d.getVar('BUILD_SYS', True)):
+            deps += " virtual/${TARGET_PREFIX}gcc virtual/${TARGET_PREFIX}compilerlibs virtual/libc "
+    return deps
+
+BASEDEPENDS = "${@base_dep_prepend(d)}"
+
+DEPENDS_prepend="${BASEDEPENDS} "
+
+FILESPATH = "${@base_set_filespath(["${FILE_DIRNAME}/${BP}", "${FILE_DIRNAME}/${BPN}", "${FILE_DIRNAME}/files"], d)}"
+# THISDIR only works properly with imediate expansion as it has to run
+# in the context of the location its used (:=)
+THISDIR = "${@os.path.dirname(d.getVar('FILE', True))}"
+
+def extra_path_elements(d):
+    path = ""
+    elements = (d.getVar('EXTRANATIVEPATH', True) or "").split()
+    for e in elements:
+        path = path + "${STAGING_BINDIR_NATIVE}/" + e + ":"
+    return path
+
+PATH_prepend = "${@extra_path_elements(d)}"
+
+def get_lic_checksum_file_list(d):
+    filelist = []
+    lic_files = d.getVar("LIC_FILES_CHKSUM", True) or ''
+    tmpdir = d.getVar("TMPDIR", True)
+
+    urls = lic_files.split()
+    for url in urls:
+        # We only care about items that are absolute paths since
+        # any others should be covered by SRC_URI.
+        try:
+            path = bb.fetch.decodeurl(url)[2]
+            if path[0] == '/':
+                if path.startswith(tmpdir):
+                    continue
+                filelist.append(path + ":" + str(os.path.exists(path)))
+        except bb.fetch.MalformedUrl:
+            raise bb.build.FuncFailed(d.getVar('PN', True) + ": LIC_FILES_CHKSUM contains an invalid URL: " + url)
+    return " ".join(filelist)
+
+addtask fetch
+do_fetch[dirs] = "${DL_DIR}"
+do_fetch[file-checksums] = "${@bb.fetch.get_checksum_file_list(d)}"
+do_fetch[file-checksums] += " ${@get_lic_checksum_file_list(d)}"
+do_fetch[vardeps] += "SRCREV"
+python base_do_fetch() {
+
+    src_uri = (d.getVar('SRC_URI', True) or "").split()
+    if len(src_uri) == 0:
+        return
+
+    try:
+        fetcher = bb.fetch2.Fetch(src_uri, d)
+        fetcher.download()
+    except bb.fetch2.BBFetchException as e:
+        raise bb.build.FuncFailed(e)
+}
+
+addtask unpack after do_fetch
+do_unpack[dirs] = "${WORKDIR}"
+python base_do_unpack() {
+    src_uri = (d.getVar('SRC_URI', True) or "").split()
+    if len(src_uri) == 0:
+        return
+
+    rootdir = d.getVar('WORKDIR', True)
+
+    # Ensure that we cleanup ${S}/patches
+    # TODO: Investigate if we can remove
+    # the entire ${S} in this case.
+    s_dir = d.getVar('S', True)
+    p_dir = os.path.join(s_dir, 'patches')
+    bb.utils.remove(p_dir, True)
+
+    try:
+        fetcher = bb.fetch2.Fetch(src_uri, d)
+        fetcher.unpack(rootdir)
+    except bb.fetch2.BBFetchException as e:
+        raise bb.build.FuncFailed(e)
+}
+
+def pkgarch_mapping(d):
+    # Compatibility mappings of TUNE_PKGARCH (opt in)
+    if d.getVar("PKGARCHCOMPAT_ARMV7A", True):
+        if d.getVar("TUNE_PKGARCH", True) == "armv7a-vfp-neon":
+            d.setVar("TUNE_PKGARCH", "armv7a")
+
+def get_layers_branch_rev(d):
+    layers = (d.getVar("BBLAYERS", True) or "").split()
+    layers_branch_rev = ["%-17s = \"%s:%s\"" % (os.path.basename(i), \
+        base_get_metadata_git_branch(i, None).strip(), \
+        base_get_metadata_git_revision(i, None)) \
+            for i in layers]
+    i = len(layers_branch_rev)-1
+    p1 = layers_branch_rev[i].find("=")
+    s1 = layers_branch_rev[i][p1:]
+    while i > 0:
+        p2 = layers_branch_rev[i-1].find("=")
+        s2= layers_branch_rev[i-1][p2:]
+        if s1 == s2:
+            layers_branch_rev[i-1] = layers_branch_rev[i-1][0:p2]
+            i -= 1
+        else:
+            i -= 1
+            p1 = layers_branch_rev[i].find("=")
+            s1= layers_branch_rev[i][p1:]
+    return layers_branch_rev
+
+
+BUILDCFG_FUNCS ??= "buildcfg_vars get_layers_branch_rev buildcfg_neededvars"
+BUILDCFG_FUNCS[type] = "list"
+
+def buildcfg_vars(d):
+    statusvars = oe.data.typed_value('BUILDCFG_VARS', d)
+    for var in statusvars:
+        value = d.getVar(var, True)
+        if value is not None:
+            yield '%-17s = "%s"' % (var, value)
+
+def buildcfg_neededvars(d):
+    needed_vars = oe.data.typed_value("BUILDCFG_NEEDEDVARS", d)
+    pesteruser = []
+    for v in needed_vars:
+        val = d.getVar(v, True)
+        if not val or val == 'INVALID':
+            pesteruser.append(v)
+
+    if pesteruser:
+        bb.fatal('The following variable(s) were not set: %s\nPlease set them directly, or choose a MACHINE or DISTRO that sets them.' % ', '.join(pesteruser))
+
+addhandler base_eventhandler
+base_eventhandler[eventmask] = "bb.event.ConfigParsed bb.event.BuildStarted bb.event.RecipePreFinalise bb.runqueue.sceneQueueComplete"
+python base_eventhandler() {
+    import bb.runqueue
+
+    if isinstance(e, bb.event.ConfigParsed):
+        if not e.data.getVar("NATIVELSBSTRING", False):
+            e.data.setVar("NATIVELSBSTRING", lsb_distro_identifier(e.data))
+        e.data.setVar('BB_VERSION', bb.__version__)
+        pkgarch_mapping(e.data)
+        oe.utils.features_backfill("DISTRO_FEATURES", e.data)
+        oe.utils.features_backfill("MACHINE_FEATURES", e.data)
+
+    if isinstance(e, bb.event.BuildStarted):
+        localdata = bb.data.createCopy(e.data)
+        bb.data.update_data(localdata)
+        statuslines = []
+        for func in oe.data.typed_value('BUILDCFG_FUNCS', localdata):
+            g = globals()
+            if func not in g:
+                bb.warn("Build configuration function '%s' does not exist" % func)
+            else:
+                flines = g[func](localdata)
+                if flines:
+                    statuslines.extend(flines)
+
+        statusheader = e.data.getVar('BUILDCFG_HEADER', True)
+        bb.plain('\n%s\n%s\n' % (statusheader, '\n'.join(statuslines)))
+
+    # This code is to silence warnings where the SDK variables overwrite the 
+    # target ones and we'd see dulpicate key names overwriting each other
+    # for various PREFERRED_PROVIDERS
+    if isinstance(e, bb.event.RecipePreFinalise):
+        if e.data.getVar("TARGET_PREFIX", True) == e.data.getVar("SDK_PREFIX", True):
+            e.data.delVar("PREFERRED_PROVIDER_virtual/${TARGET_PREFIX}binutils")
+            e.data.delVar("PREFERRED_PROVIDER_virtual/${TARGET_PREFIX}gcc-initial")
+            e.data.delVar("PREFERRED_PROVIDER_virtual/${TARGET_PREFIX}gcc")
+            e.data.delVar("PREFERRED_PROVIDER_virtual/${TARGET_PREFIX}g++")
+            e.data.delVar("PREFERRED_PROVIDER_virtual/${TARGET_PREFIX}compilerlibs")
+
+    if isinstance(e, bb.runqueue.sceneQueueComplete):
+        completions = e.data.expand("${STAGING_DIR}/sstatecompletions")
+        if os.path.exists(completions):
+            cmds = set()
+            with open(completions, "r") as f:
+                cmds = set(f)
+            e.data.setVar("completion_function", "\n".join(cmds))
+            e.data.setVarFlag("completion_function", "func", "1")
+            bb.debug(1, "Executing SceneQueue Completion commands: %s" % "\n".join(cmds))
+            bb.build.exec_func("completion_function", e.data)
+            os.remove(completions)
+}
+
+CONFIGURESTAMPFILE = "${WORKDIR}/configure.sstate"
+CLEANBROKEN = "0"
+
+addtask configure after do_patch
+do_configure[dirs] = "${B}"
+do_configure[deptask] = "do_populate_sysroot"
+base_do_configure() {
+	if [ -n "${CONFIGURESTAMPFILE}" -a -e "${CONFIGURESTAMPFILE}" ]; then
+		if [ "`cat ${CONFIGURESTAMPFILE}`" != "${BB_TASKHASH}" ]; then
+			cd ${B}
+			if [ "${CLEANBROKEN}" != "1" -a \( -e Makefile -o -e makefile -o -e GNUmakefile \) ]; then
+				oe_runmake clean
+			fi
+			find ${B} -ignore_readdir_race -name \*.la -delete
+		fi
+	fi
+	if [ -n "${CONFIGURESTAMPFILE}" ]; then
+		echo ${BB_TASKHASH} > ${CONFIGURESTAMPFILE}
+	fi
+}
+
+addtask compile after do_configure
+do_compile[dirs] = "${B}"
+base_do_compile() {
+	if [ -e Makefile -o -e makefile -o -e GNUmakefile ]; then
+		oe_runmake || die "make failed"
+	else
+		bbnote "nothing to compile"
+	fi
+}
+
+addtask install after do_compile
+do_install[dirs] = "${D} ${B}"
+# Remove and re-create ${D} so that is it guaranteed to be empty
+do_install[cleandirs] = "${D}"
+
+base_do_install() {
+	:
+}
+
+base_do_package() {
+	:
+}
+
+addtask build after do_populate_sysroot
+do_build[noexec] = "1"
+do_build[recrdeptask] += "do_deploy"
+do_build () {
+	:
+}
+
+def set_packagetriplet(d):
+    archs = []
+    tos = []
+    tvs = []
+
+    archs.append(d.getVar("PACKAGE_ARCHS", True).split())
+    tos.append(d.getVar("TARGET_OS", True))
+    tvs.append(d.getVar("TARGET_VENDOR", True))
+
+    def settriplet(d, varname, archs, tos, tvs):
+        triplets = []
+        for i in range(len(archs)):
+            for arch in archs[i]:
+                triplets.append(arch + tvs[i] + "-" + tos[i])
+        triplets.reverse()
+        d.setVar(varname, " ".join(triplets))
+
+    settriplet(d, "PKGTRIPLETS", archs, tos, tvs)
+
+    variants = d.getVar("MULTILIB_VARIANTS", True) or ""
+    for item in variants.split():
+        localdata = bb.data.createCopy(d)
+        overrides = localdata.getVar("OVERRIDES", False) + ":virtclass-multilib-" + item
+        localdata.setVar("OVERRIDES", overrides)
+        bb.data.update_data(localdata)
+
+        archs.append(localdata.getVar("PACKAGE_ARCHS", True).split())
+        tos.append(localdata.getVar("TARGET_OS", True))
+        tvs.append(localdata.getVar("TARGET_VENDOR", True))
+
+    settriplet(d, "PKGMLTRIPLETS", archs, tos, tvs)
+
+python () {
+    import string, re
+
+    # Handle PACKAGECONFIG
+    #
+    # These take the form:
+    #
+    # PACKAGECONFIG ??= "<default options>"
+    # PACKAGECONFIG[foo] = "--enable-foo,--disable-foo,foo_depends,foo_runtime_depends"
+    pkgconfigflags = d.getVarFlags("PACKAGECONFIG") or {}
+    if pkgconfigflags:
+        pkgconfig = (d.getVar('PACKAGECONFIG', True) or "").split()
+        pn = d.getVar("PN", True)
+
+        mlprefix = d.getVar("MLPREFIX", True)
+
+        def expandFilter(appends, extension, prefix):
+            appends = bb.utils.explode_deps(d.expand(" ".join(appends)))
+            newappends = []
+            for a in appends:
+                if a.endswith("-native") or ("-cross-" in a):
+                    newappends.append(a)
+                elif a.startswith("virtual/"):
+                    subs = a.split("/", 1)[1]
+                    newappends.append("virtual/" + prefix + subs + extension)
+                else:
+                    if a.startswith(prefix):
+                        newappends.append(a + extension)
+                    else:
+                        newappends.append(prefix + a + extension)
+            return newappends
+
+        def appendVar(varname, appends):
+            if not appends:
+                return
+            if varname.find("DEPENDS") != -1:
+                if pn.startswith("nativesdk-"):
+                    appends = expandFilter(appends, "", "nativesdk-")
+                if pn.endswith("-native"):
+                    appends = expandFilter(appends, "-native", "")
+                if mlprefix:
+                    appends = expandFilter(appends, "", mlprefix)
+            varname = d.expand(varname)
+            d.appendVar(varname, " " + " ".join(appends))
+
+        extradeps = []
+        extrardeps = []
+        extraconf = []
+        for flag, flagval in sorted(pkgconfigflags.items()):
+            items = flagval.split(",")
+            num = len(items)
+            if num > 4:
+                bb.error("Only enable,disable,depend,rdepend can be specified!")
+
+            if flag in pkgconfig:
+                if num >= 3 and items[2]:
+                    extradeps.append(items[2])
+                if num >= 4 and items[3]:
+                    extrardeps.append(items[3])
+                if num >= 1 and items[0]:
+                    extraconf.append(items[0])
+            elif num >= 2 and items[1]:
+                    extraconf.append(items[1])
+        appendVar('DEPENDS', extradeps)
+        appendVar('RDEPENDS_${PN}', extrardeps)
+        if bb.data.inherits_class('cmake', d):
+            appendVar('EXTRA_OECMAKE', extraconf)
+        else:
+            appendVar('EXTRA_OECONF', extraconf)
+
+    pn = d.getVar('PN', True)
+    license = d.getVar('LICENSE', True)
+    if license == "INVALID":
+        bb.fatal('This recipe does not have the LICENSE field set (%s)' % pn)
+
+    if bb.data.inherits_class('license', d):
+        check_license_format(d)
+        unmatched_license_flag = check_license_flags(d)
+        if unmatched_license_flag:
+            bb.debug(1, "Skipping %s because it has a restricted license not"
+                 " whitelisted in LICENSE_FLAGS_WHITELIST" % pn)
+            raise bb.parse.SkipPackage("because it has a restricted license not"
+                 " whitelisted in LICENSE_FLAGS_WHITELIST")
+
+    # If we're building a target package we need to use fakeroot (pseudo)
+    # in order to capture permissions, owners, groups and special files
+    if not bb.data.inherits_class('native', d) and not bb.data.inherits_class('cross', d):
+        d.setVarFlag('do_unpack', 'umask', '022')
+        d.setVarFlag('do_configure', 'umask', '022')
+        d.setVarFlag('do_compile', 'umask', '022')
+        d.appendVarFlag('do_install', 'depends', ' virtual/fakeroot-native:do_populate_sysroot')
+        d.setVarFlag('do_install', 'fakeroot', 1)
+        d.setVarFlag('do_install', 'umask', '022')
+        d.appendVarFlag('do_package', 'depends', ' virtual/fakeroot-native:do_populate_sysroot')
+        d.setVarFlag('do_package', 'fakeroot', 1)
+        d.setVarFlag('do_package', 'umask', '022')
+        d.setVarFlag('do_package_setscene', 'fakeroot', 1)
+        d.appendVarFlag('do_package_setscene', 'depends', ' virtual/fakeroot-native:do_populate_sysroot')
+        d.setVarFlag('do_devshell', 'fakeroot', 1)
+        d.appendVarFlag('do_devshell', 'depends', ' virtual/fakeroot-native:do_populate_sysroot')
+    source_mirror_fetch = d.getVar('SOURCE_MIRROR_FETCH', 0)
+    if not source_mirror_fetch:
+        need_host = d.getVar('COMPATIBLE_HOST', True)
+        if need_host:
+            import re
+            this_host = d.getVar('HOST_SYS', True)
+            if not re.match(need_host, this_host):
+                raise bb.parse.SkipPackage("incompatible with host %s (not in COMPATIBLE_HOST)" % this_host)
+
+        need_machine = d.getVar('COMPATIBLE_MACHINE', True)
+        if need_machine:
+            import re
+            compat_machines = (d.getVar('MACHINEOVERRIDES', True) or "").split(":")
+            for m in compat_machines:
+                if re.match(need_machine, m):
+                    break
+            else:
+                raise bb.parse.SkipPackage("incompatible with machine %s (not in COMPATIBLE_MACHINE)" % d.getVar('MACHINE', True))
+
+
+        bad_licenses = (d.getVar('INCOMPATIBLE_LICENSE', True) or "").split()
+
+        check_license = False if pn.startswith("nativesdk-") else True
+        for t in ["-native", "-cross-${TARGET_ARCH}", "-cross-initial-${TARGET_ARCH}",
+              "-crosssdk-${SDK_ARCH}", "-crosssdk-initial-${SDK_ARCH}",
+              "-cross-canadian-${TRANSLATED_TARGET_ARCH}"]:
+            if pn.endswith(d.expand(t)):
+                check_license = False
+        if pn.startswith("gcc-source-"):
+            check_license = False
+
+        if check_license and bad_licenses:
+            bad_licenses = expand_wildcard_licenses(d, bad_licenses)
+
+            whitelist = []
+            incompatwl = []
+            htincompatwl = []
+            for lic in bad_licenses:
+                spdx_license = return_spdx(d, lic)
+                for w in ["HOSTTOOLS_WHITELIST_", "LGPLv2_WHITELIST_", "WHITELIST_"]:
+                    whitelist.extend((d.getVar(w + lic, True) or "").split())
+                    if spdx_license:
+                        whitelist.extend((d.getVar(w + spdx_license, True) or "").split())
+                    '''
+                    We need to track what we are whitelisting and why. If pn is 
+                    incompatible and is not HOSTTOOLS_WHITELIST_ we need to be 
+                    able to note that the image that is created may infact 
+                    contain incompatible licenses despite INCOMPATIBLE_LICENSE 
+                    being set.
+                    '''
+                    if "HOSTTOOLS" in w:
+                        htincompatwl.extend((d.getVar(w + lic, True) or "").split())
+                        if spdx_license:
+                            htincompatwl.extend((d.getVar(w + spdx_license, True) or "").split())
+                    else:
+                        incompatwl.extend((d.getVar(w + lic, True) or "").split())
+                        if spdx_license:
+                            incompatwl.extend((d.getVar(w + spdx_license, True) or "").split())
+
+            if not pn in whitelist:
+                recipe_license = d.getVar('LICENSE', True)
+                pkgs = d.getVar('PACKAGES', True).split()
+                skipped_pkgs = []
+                unskipped_pkgs = []
+                for pkg in pkgs:
+                    if incompatible_license(d, bad_licenses, pkg):
+                        skipped_pkgs.append(pkg)
+                    else:
+                        unskipped_pkgs.append(pkg)
+                all_skipped = skipped_pkgs and not unskipped_pkgs
+                if unskipped_pkgs:
+                    for pkg in skipped_pkgs:
+                        bb.debug(1, "SKIPPING the package " + pkg + " at do_rootfs because it's " + recipe_license)
+                        d.setVar('LICENSE_EXCLUSION-' + pkg, 1)
+                    for pkg in unskipped_pkgs:
+                        bb.debug(1, "INCLUDING the package " + pkg)
+                elif all_skipped or incompatible_license(d, bad_licenses):
+                    bb.debug(1, "SKIPPING recipe %s because it's %s" % (pn, recipe_license))
+                    raise bb.parse.SkipPackage("incompatible with license %s" % recipe_license)
+            elif pn in whitelist:
+                if pn in incompatwl:
+                    bb.note("INCLUDING " + pn + " as buildable despite INCOMPATIBLE_LICENSE because it has been whitelisted")
+                elif pn in htincompatwl:
+                    bb.note("INCLUDING " + pn + " as buildable despite INCOMPATIBLE_LICENSE because it has been whitelisted for HOSTTOOLS")
+
+    srcuri = d.getVar('SRC_URI', True)
+    # Svn packages should DEPEND on subversion-native
+    if "svn://" in srcuri:
+        d.appendVarFlag('do_fetch', 'depends', ' subversion-native:do_populate_sysroot')
+
+    # Git packages should DEPEND on git-native
+    if "git://" in srcuri:
+        d.appendVarFlag('do_fetch', 'depends', ' git-native:do_populate_sysroot')
+
+    # Mercurial packages should DEPEND on mercurial-native
+    elif "hg://" in srcuri:
+        d.appendVarFlag('do_fetch', 'depends', ' mercurial-native:do_populate_sysroot')
+
+    # OSC packages should DEPEND on osc-native
+    elif "osc://" in srcuri:
+        d.appendVarFlag('do_fetch', 'depends', ' osc-native:do_populate_sysroot')
+
+    # *.lz4 should depends on lz4-native for unpacking
+    # Not endswith because of "*.patch.lz4;patch=1". Need bb.fetch.decodeurl in future
+    if '.lz4' in srcuri:
+        d.appendVarFlag('do_unpack', 'depends', ' lz4-native:do_populate_sysroot')
+
+    # *.xz should depends on xz-native for unpacking
+    # Not endswith because of "*.patch.xz;patch=1". Need bb.fetch.decodeurl in future
+    if '.xz' in srcuri:
+        d.appendVarFlag('do_unpack', 'depends', ' xz-native:do_populate_sysroot')
+
+    # unzip-native should already be staged before unpacking ZIP recipes
+    if ".zip" in srcuri:
+        d.appendVarFlag('do_unpack', 'depends', ' unzip-native:do_populate_sysroot')
+
+    # file is needed by rpm2cpio.sh
+    if ".src.rpm" in srcuri:
+        d.appendVarFlag('do_unpack', 'depends', ' file-native:do_populate_sysroot')
+
+    set_packagetriplet(d)
+
+    # 'multimachine' handling
+    mach_arch = d.getVar('MACHINE_ARCH', True)
+    pkg_arch = d.getVar('PACKAGE_ARCH', True)
+
+    if (pkg_arch == mach_arch):
+        # Already machine specific - nothing further to do
+        return
+
+    #
+    # We always try to scan SRC_URI for urls with machine overrides
+    # unless the package sets SRC_URI_OVERRIDES_PACKAGE_ARCH=0
+    #
+    override = d.getVar('SRC_URI_OVERRIDES_PACKAGE_ARCH', True)
+    if override != '0':
+        paths = []
+        fpaths = (d.getVar('FILESPATH', True) or '').split(':')
+        machine = d.getVar('MACHINE', True)
+        for p in fpaths:
+            if os.path.basename(p) == machine and os.path.isdir(p):
+                paths.append(p)
+
+        if len(paths) != 0:
+            for s in srcuri.split():
+                if not s.startswith("file://"):
+                    continue
+                fetcher = bb.fetch2.Fetch([s], d)
+                local = fetcher.localpath(s)
+                for mp in paths:
+                    if local.startswith(mp):
+                        #bb.note("overriding PACKAGE_ARCH from %s to %s for %s" % (pkg_arch, mach_arch, pn))
+                        d.setVar('PACKAGE_ARCH', "${MACHINE_ARCH}")
+                        return
+
+    packages = d.getVar('PACKAGES', True).split()
+    for pkg in packages:
+        pkgarch = d.getVar("PACKAGE_ARCH_%s" % pkg, True)
+
+        # We could look for != PACKAGE_ARCH here but how to choose
+        # if multiple differences are present?
+        # Look through PACKAGE_ARCHS for the priority order?
+        if pkgarch and pkgarch == mach_arch:
+            d.setVar('PACKAGE_ARCH', "${MACHINE_ARCH}")
+            bb.warn("Recipe %s is marked as only being architecture specific but seems to have machine specific packages?! The recipe may as well mark itself as machine specific directly." % d.getVar("PN", True))
+}
+
+addtask cleansstate after do_clean
+python do_cleansstate() {
+        sstate_clean_cachefiles(d)
+}
+
+addtask cleanall after do_cleansstate
+python do_cleanall() {
+    src_uri = (d.getVar('SRC_URI', True) or "").split()
+    if len(src_uri) == 0:
+        return
+
+    try:
+        fetcher = bb.fetch2.Fetch(src_uri, d)
+        fetcher.clean()
+    except bb.fetch2.BBFetchException, e:
+        raise bb.build.FuncFailed(e)
+}
+do_cleanall[nostamp] = "1"
+
+
+EXPORT_FUNCTIONS do_fetch do_unpack do_configure do_compile do_install do_package