diff --git a/poky/meta/classes/archiver.bbclass b/poky/meta/classes/archiver.bbclass
index 598298e..858507b 100644
--- a/poky/meta/classes/archiver.bbclass
+++ b/poky/meta/classes/archiver.bbclass
@@ -590,6 +590,7 @@
 addtask do_ar_recipe
 addtask do_deploy_archives
 do_build[recrdeptask] += "do_deploy_archives"
+do_rootfs[recrdeptask] += "do_deploy_archives"
 do_populate_sdk[recrdeptask] += "do_deploy_archives"
 
 python () {
diff --git a/poky/meta/classes/ccache.bbclass b/poky/meta/classes/ccache.bbclass
index b545735..f00fafc 100644
--- a/poky/meta/classes/ccache.bbclass
+++ b/poky/meta/classes/ccache.bbclass
@@ -1,5 +1,7 @@
 #
 # Usage:
+# - Install ccache package on the host distribution and set up a build directory
+#
 # - Enable ccache
 #   Add the following line to a conffile such as conf/local.conf:
 #   INHERIT += "ccache"
@@ -33,6 +35,10 @@
 
 export CCACHE_DIR ?= "${CCACHE_TOP_DIR}/${MULTIMACH_TARGET_SYS}/${PN}"
 
+# Fixed errors:
+# ccache: error: Failed to create directory /run/user/0/ccache-tmp: Permission denied
+export CCACHE_TEMPDIR ?= "${CCACHE_DIR}/tmp"
+
 # We need to stop ccache considering the current directory or the
 # debug-prefix-map target directory to be significant when calculating
 # its hash. Without this the cache would be invalidated every time
@@ -47,7 +53,6 @@
     # quilt-native doesn't need ccache since no c files
     if not (pn in ('ccache-native', 'quilt-native') or
             bb.utils.to_boolean(d.getVar('CCACHE_DISABLE'))):
-        d.appendVar('DEPENDS', ' ccache-native')
         d.setVar('CCACHE', 'ccache ')
 }
 
diff --git a/poky/meta/classes/distutils3.bbclass b/poky/meta/classes/distutils3.bbclass
index 7356b52..a916a80 100644
--- a/poky/meta/classes/distutils3.bbclass
+++ b/poky/meta/classes/distutils3.bbclass
@@ -12,28 +12,30 @@
 DISTUTILS_PYTHON = "python3"
 DISTUTILS_PYTHON_class-native = "nativepython3"
 
+DISTUTILS_SETUP_PATH ?= "${S}"
+
 distutils3_do_configure() {
     :
 }
 
 distutils3_do_compile() {
-        cd ${S}
+        cd ${DISTUTILS_SETUP_PATH}
         NO_FETCH_BUILD=1 \
         STAGING_INCDIR=${STAGING_INCDIR} \
         STAGING_LIBDIR=${STAGING_LIBDIR} \
-        ${STAGING_BINDIR_NATIVE}/${PYTHON_PN}-native/${PYTHON_PN} ${S}/setup.py \
+        ${STAGING_BINDIR_NATIVE}/${PYTHON_PN}-native/${PYTHON_PN} setup.py \
         build --build-base=${B} ${DISTUTILS_BUILD_ARGS} || \
         bbfatal_log "'${PYTHON_PN} setup.py build ${DISTUTILS_BUILD_ARGS}' execution failed."
 }
 distutils3_do_compile[vardepsexclude] = "MACHINE"
 
 distutils3_do_install() {
-        cd ${S}
+        cd ${DISTUTILS_SETUP_PATH}
         install -d ${D}${PYTHON_SITEPACKAGES_DIR}
         STAGING_INCDIR=${STAGING_INCDIR} \
         STAGING_LIBDIR=${STAGING_LIBDIR} \
         PYTHONPATH=${D}${PYTHON_SITEPACKAGES_DIR} \
-        ${STAGING_BINDIR_NATIVE}/${PYTHON_PN}-native/${PYTHON_PN} ${S}/setup.py \
+        ${STAGING_BINDIR_NATIVE}/${PYTHON_PN}-native/${PYTHON_PN} setup.py \
         build --build-base=${B} install --skip-build ${DISTUTILS_INSTALL_ARGS} || \
         bbfatal_log "'${PYTHON_PN} setup.py install ${DISTUTILS_INSTALL_ARGS}' execution failed."
 
diff --git a/poky/meta/classes/go.bbclass b/poky/meta/classes/go.bbclass
index a9e31b5..5b26378 100644
--- a/poky/meta/classes/go.bbclass
+++ b/poky/meta/classes/go.bbclass
@@ -40,6 +40,7 @@
 GO_EXTLDFLAGS ?= "${HOST_CC_ARCH}${TOOLCHAIN_OPTIONS} ${GO_RPATH_LINK} ${LDFLAGS}"
 GO_LINKMODE ?= ""
 GO_LINKMODE_class-nativesdk = "--linkmode=external"
+GO_LINKMODE_class-native = "--linkmode=external"
 GO_LDFLAGS ?= '-ldflags="${GO_RPATH} ${GO_LINKMODE} -extldflags '${GO_EXTLDFLAGS}'"'
 export GOBUILDFLAGS ?= "-v ${GO_LDFLAGS} -trimpath"
 export GOPATH_OMIT_IN_ACTIONID ?= "1"
diff --git a/poky/meta/classes/grub-efi-cfg.bbclass b/poky/meta/classes/grub-efi-cfg.bbclass
index 3a2cdd6..ea21b3d 100644
--- a/poky/meta/classes/grub-efi-cfg.bbclass
+++ b/poky/meta/classes/grub-efi-cfg.bbclass
@@ -120,3 +120,4 @@
 
     cfgfile.close()
 }
+build_efi_cfg[vardepsexclude] += "OVERRIDES"
diff --git a/poky/meta/classes/insane.bbclass b/poky/meta/classes/insane.bbclass
index cf2165c..105d2a5 100644
--- a/poky/meta/classes/insane.bbclass
+++ b/poky/meta/classes/insane.bbclass
@@ -87,7 +87,8 @@
 
 QAPATHTEST[shebang-size] = "package_qa_check_shebang_size"
 def package_qa_check_shebang_size(path, name, d, elf, messages):
-    if os.path.islink(path) or elf:
+    import stat
+    if os.path.islink(path) or stat.S_ISFIFO(os.stat(path).st_mode) or elf:
         return
 
     try:
diff --git a/poky/meta/classes/kernel-fitimage.bbclass b/poky/meta/classes/kernel-fitimage.bbclass
index bb2f3c4..9fa302a 100644
--- a/poky/meta/classes/kernel-fitimage.bbclass
+++ b/poky/meta/classes/kernel-fitimage.bbclass
@@ -72,6 +72,19 @@
 # Standard format for public key certificate
 FIT_KEY_SIGN_PKCS ?= "-x509"
 
+# Description string
+FIT_DESC ?= "U-Boot fitImage for ${DISTRO_NAME}/${PV}/${MACHINE}"
+
+# Sign individual images as well
+FIT_SIGN_INDIVIDUAL ?= "0"
+
+# mkimage command
+UBOOT_MKIMAGE ?= "uboot-mkimage"
+UBOOT_MKIMAGE_SIGN ?= "${UBOOT_MKIMAGE}"
+
+# Arguments passed to mkimage for signing
+UBOOT_MKIMAGE_SIGN_ARGS ?= ""
+
 #
 # Emit the fitImage ITS header
 #
@@ -81,7 +94,7 @@
 /dts-v1/;
 
 / {
-        description = "U-Boot fitImage for ${DISTRO_NAME}/${PV}/${MACHINE}";
+        description = "${FIT_DESC}";
         #address-cells = <1>;
 EOF
 }
@@ -132,6 +145,8 @@
 fitimage_emit_section_kernel() {
 
 	kernel_csum="${FIT_HASH_ALG}"
+	kernel_sign_algo="${FIT_SIGN_ALG}"
+	kernel_sign_keyname="${UBOOT_SIGN_KEYNAME}"
 
 	ENTRYPOINT="${UBOOT_ENTRYPOINT}"
 	if [ -n "${UBOOT_ENTRYSYMBOL}" ]; then
@@ -154,6 +169,17 @@
                         };
                 };
 EOF
+
+	if [ "${UBOOT_SIGN_ENABLE}" = "1" -a "${FIT_SIGN_INDIVIDUAL}" = "1" -a -n "${kernel_sign_keyname}" ] ; then
+		sed -i '$ d' ${1}
+		cat << EOF >> ${1}
+                        signature@1 {
+                                algo = "${kernel_csum},${kernel_sign_algo}";
+                                key-name-hint = "${kernel_sign_keyname}";
+                        };
+                };
+EOF
+	fi
 }
 
 #
@@ -165,6 +191,8 @@
 fitimage_emit_section_dtb() {
 
 	dtb_csum="${FIT_HASH_ALG}"
+	dtb_sign_algo="${FIT_SIGN_ALG}"
+	dtb_sign_keyname="${UBOOT_SIGN_KEYNAME}"
 
 	dtb_loadline=""
 	dtb_ext=${DTB##*.}
@@ -188,6 +216,17 @@
                         };
                 };
 EOF
+
+	if [ "${UBOOT_SIGN_ENABLE}" = "1" -a "${FIT_SIGN_INDIVIDUAL}" = "1" -a -n "${dtb_sign_keyname}" ] ; then
+		sed -i '$ d' ${1}
+		cat << EOF >> ${1}
+                        signature@1 {
+                                algo = "${dtb_csum},${dtb_sign_algo}";
+                                key-name-hint = "${dtb_sign_keyname}";
+                        };
+                };
+EOF
+	fi
 }
 
 #
@@ -226,6 +265,8 @@
 fitimage_emit_section_ramdisk() {
 
 	ramdisk_csum="${FIT_HASH_ALG}"
+	ramdisk_sign_algo="${FIT_SIGN_ALG}"
+	ramdisk_sign_keyname="${UBOOT_SIGN_KEYNAME}"
 	ramdisk_loadline=""
 	ramdisk_entryline=""
 
@@ -251,6 +292,17 @@
                         };
                 };
 EOF
+
+	if [ "${UBOOT_SIGN_ENABLE}" = "1" -a "${FIT_SIGN_INDIVIDUAL}" = "1" -a -n "${ramdisk_sign_keyname}" ] ; then
+		sed -i '$ d' ${1}
+		cat << EOF >> ${1}
+                        signature@1 {
+                                algo = "${ramdisk_csum},${ramdisk_sign_algo}";
+                                key-name-hint = "${ramdisk_sign_keyname}";
+                        };
+                };
+EOF
+	fi
 }
 
 #
@@ -270,6 +322,13 @@
 		conf_sign_keyname="${UBOOT_SIGN_KEYNAME}"
 	fi
 
+	its_file="${1}"
+	kernel_id="${2}"
+	dtb_image="${3}"
+	ramdisk_id="${4}"
+	config_id="${5}"
+	default_flag="${6}"
+
 	# Test if we have any DTBs at all
 	sep=""
 	conf_desc=""
@@ -282,49 +341,49 @@
 
 	# conf node name is selected based on dtb ID if it is present,
 	# otherwise its selected based on kernel ID
-	if [ -n "${3}" ]; then
-		conf_node=$conf_node${3}
+	if [ -n "${dtb_image}" ]; then
+		conf_node=$conf_node${dtb_image}
 	else
-		conf_node=$conf_node${2}
+		conf_node=$conf_node${kernel_id}
 	fi
 
-	if [ -n "${2}" ]; then
+	if [ -n "${kernel_id}" ]; then
 		conf_desc="Linux kernel"
 		sep=", "
-		kernel_line="kernel = \"kernel@${2}\";"
+		kernel_line="kernel = \"kernel@${kernel_id}\";"
 	fi
 
-	if [ -n "${3}" ]; then
+	if [ -n "${dtb_image}" ]; then
 		conf_desc="${conf_desc}${sep}FDT blob"
 		sep=", "
-		fdt_line="fdt = \"fdt@${3}\";"
+		fdt_line="fdt = \"fdt@${dtb_image}\";"
 	fi
 
-	if [ -n "${4}" ]; then
+	if [ -n "${ramdisk_id}" ]; then
 		conf_desc="${conf_desc}${sep}ramdisk"
 		sep=", "
-		ramdisk_line="ramdisk = \"ramdisk@${4}\";"
+		ramdisk_line="ramdisk = \"ramdisk@${ramdisk_id}\";"
 	fi
 
-	if [ -n "${5}" ]; then
+	if [ -n "${config_id}" ]; then
 		conf_desc="${conf_desc}${sep}setup"
-		setup_line="setup = \"setup@${5}\";"
+		setup_line="setup = \"setup@${config_id}\";"
 	fi
 
-	if [ "${6}" = "1" ]; then
+	if [ "${default_flag}" = "1" ]; then
 		# default node is selected based on dtb ID if it is present,
 		# otherwise its selected based on kernel ID
-		if [ -n "${3}" ]; then
-			default_line="default = \"conf@${3}\";"
+		if [ -n "${dtb_image}" ]; then
+			default_line="default = \"conf@${dtb_image}\";"
 		else
-			default_line="default = \"conf@${2}\";"
+			default_line="default = \"conf@${kernel_id}\";"
 		fi
 	fi
 
-	cat << EOF >> ${1}
+	cat << EOF >> ${its_file}
                 ${default_line}
                 $conf_node {
-			description = "${6} ${conf_desc}";
+			description = "${default_flag} ${conf_desc}";
 			${kernel_line}
 			${fdt_line}
 			${ramdisk_line}
@@ -339,28 +398,28 @@
 		sign_line="sign-images = "
 		sep=""
 
-		if [ -n "${2}" ]; then
+		if [ -n "${kernel_id}" ]; then
 			sign_line="${sign_line}${sep}\"kernel\""
 			sep=", "
 		fi
 
-		if [ -n "${3}" ]; then
+		if [ -n "${dtb_image}" ]; then
 			sign_line="${sign_line}${sep}\"fdt\""
 			sep=", "
 		fi
 
-		if [ -n "${4}" ]; then
+		if [ -n "${ramdisk_id}" ]; then
 			sign_line="${sign_line}${sep}\"ramdisk\""
 			sep=", "
 		fi
 
-		if [ -n "${5}" ]; then
+		if [ -n "${config_id}" ]; then
 			sign_line="${sign_line}${sep}\"setup\""
 		fi
 
 		sign_line="${sign_line};"
 
-		cat << EOF >> ${1}
+		cat << EOF >> ${its_file}
                         signature@1 {
                                 algo = "${conf_csum},${conf_sign_algo}";
                                 key-name-hint = "${conf_sign_keyname}";
@@ -369,7 +428,7 @@
 EOF
 	fi
 
-	cat << EOF >> ${1}
+	cat << EOF >> ${its_file}
                 };
 EOF
 }
@@ -495,7 +554,7 @@
 	#
 	# Step 6: Assemble the image
 	#
-	uboot-mkimage \
+	${UBOOT_MKIMAGE} \
 		${@'-D "${UBOOT_MKIMAGE_DTCOPTS}"' if len('${UBOOT_MKIMAGE_DTCOPTS}') else ''} \
 		-f ${1} \
 		arch/${ARCH}/boot/${2}
@@ -511,11 +570,12 @@
 			cp -P ${STAGING_DATADIR}/u-boot*.dtb ${B}
 			add_key_to_u_boot="-K ${B}/${UBOOT_DTB_BINARY}"
 		fi
-		uboot-mkimage \
+		${UBOOT_MKIMAGE_SIGN} \
 			${@'-D "${UBOOT_MKIMAGE_DTCOPTS}"' if len('${UBOOT_MKIMAGE_DTCOPTS}') else ''} \
 			-F -k "${UBOOT_SIGN_KEYDIR}" \
 			$add_key_to_u_boot \
-			-r arch/${ARCH}/boot/${2}
+			-r arch/${ARCH}/boot/${2} \
+			${UBOOT_MKIMAGE_SIGN_ARGS}
 	fi
 }
 
diff --git a/poky/meta/classes/kernel.bbclass b/poky/meta/classes/kernel.bbclass
index 1a444ef..2f1006d 100644
--- a/poky/meta/classes/kernel.bbclass
+++ b/poky/meta/classes/kernel.bbclass
@@ -1,5 +1,7 @@
 inherit linux-kernel-base kernel-module-split
 
+COMPATIBLE_HOST = ".*-linux"
+
 KERNEL_PACKAGE_NAME ??= "kernel"
 KERNEL_DEPLOYSUBDIR ??= "${@ "" if (d.getVar("KERNEL_PACKAGE_NAME") == "kernel") else d.getVar("KERNEL_PACKAGE_NAME") }"
 
diff --git a/poky/meta/classes/license.bbclass b/poky/meta/classes/license.bbclass
index f90176d..dc91118 100644
--- a/poky/meta/classes/license.bbclass
+++ b/poky/meta/classes/license.bbclass
@@ -31,6 +31,7 @@
             f.write("%s: %s\n" % (key, info[key]))
 }
 
+PSEUDO_IGNORE_PATHS .= ",${@','.join(((d.getVar('COMMON_LICENSE_DIR') or '') + ' ' + (d.getVar('LICENSE_PATH') or '')).split())}"
 # it would be better to copy them in do_install_append, but find_license_filesa is python
 python perform_packagecopy_prepend () {
     enabled = oe.data.typed_value('LICENSE_CREATE_PACKAGE', d)
diff --git a/poky/meta/classes/linuxloader.bbclass b/poky/meta/classes/linuxloader.bbclass
index 720e5df..b161c51 100644
--- a/poky/meta/classes/linuxloader.bbclass
+++ b/poky/meta/classes/linuxloader.bbclass
@@ -1,6 +1,6 @@
 def get_musl_loader_arch(d):
     import re
-    ldso_arch = None
+    ldso_arch = "NotSupported"
 
     targetarch = d.getVar("TARGET_ARCH")
     if targetarch.startswith("microblaze"):
@@ -32,7 +32,7 @@
 def get_glibc_loader(d):
     import re
 
-    dynamic_loader = None
+    dynamic_loader = "NotSupported"
     targetarch = d.getVar("TARGET_ARCH")
     if targetarch in ["powerpc", "microblaze"]:
         dynamic_loader = "${base_libdir}/ld.so.1"
@@ -58,7 +58,7 @@
     overrides = d.getVar("OVERRIDES").split(":")
 
     if "libc-baremetal" in overrides:
-        return None
+        return "NotSupported"
 
     if "libc-musl" in overrides:
         dynamic_loader = get_musl_loader(d)
diff --git a/poky/meta/classes/populate_sdk_base.bbclass b/poky/meta/classes/populate_sdk_base.bbclass
index 49b1833..4db0511 100644
--- a/poky/meta/classes/populate_sdk_base.bbclass
+++ b/poky/meta/classes/populate_sdk_base.bbclass
@@ -263,7 +263,7 @@
 
 	rm -f ${T}/pre_install_command ${T}/post_install_command
 
-	if [ ${SDK_RELOCATE_AFTER_INSTALL} -eq 1 ] ; then
+	if [ "${SDK_RELOCATE_AFTER_INSTALL}" = "1" ] ; then
 		cp ${TOOLCHAIN_SHAR_REL_TMPL} ${T}/post_install_command
 	fi
 	cat << "EOF" >> ${T}/pre_install_command
diff --git a/poky/meta/classes/sanity.bbclass b/poky/meta/classes/sanity.bbclass
index 3262d08..d134b40 100644
--- a/poky/meta/classes/sanity.bbclass
+++ b/poky/meta/classes/sanity.bbclass
@@ -770,10 +770,10 @@
     if 0 == os.getuid():
         raise_sanity_error("Do not use Bitbake as root.", d)
 
-    # Check the Python version, we now have a minimum of Python 3.4
+    # Check the Python version, we now have a minimum of Python 3.6
     import sys
-    if sys.hexversion < 0x030500F0:
-        status.addresult('The system requires at least Python 3.5 to run. Please update your Python interpreter.\n')
+    if sys.hexversion < 0x030600F0:
+        status.addresult('The system requires at least Python 3.6 to run. Please update your Python interpreter.\n')
 
     # Check the bitbake version meets minimum requirements
     from distutils.version import LooseVersion
diff --git a/poky/meta/classes/uboot-extlinux-config.bbclass b/poky/meta/classes/uboot-extlinux-config.bbclass
index f4bf94b..be285da 100644
--- a/poky/meta/classes/uboot-extlinux-config.bbclass
+++ b/poky/meta/classes/uboot-extlinux-config.bbclass
@@ -153,5 +153,6 @@
 }
 UBOOT_EXTLINUX_VARS = "CONSOLE MENU_DESCRIPTION ROOT KERNEL_IMAGE FDTDIR FDT KERNEL_ARGS INITRD"
 do_create_extlinux_config[vardeps] += "${@' '.join(['UBOOT_EXTLINUX_%s_%s' % (v, l) for v in d.getVar('UBOOT_EXTLINUX_VARS').split() for l in d.getVar('UBOOT_EXTLINUX_LABELS').split()])}"
+do_create_extlinux_config[vardepsexclude] += "OVERRIDES"
 
 addtask create_extlinux_config before do_install do_deploy after do_compile