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authorRichard Purdie <richard.purdie@linuxfoundation.org>2022-08-10 18:55:54 +0100
committerRichard Purdie <richard.purdie@linuxfoundation.org>2022-08-12 11:57:33 +0100
commit081a391fe09a21265881e39a2a496e4e10b4f80b (patch)
treeed3d4188be84c4219e471da2c439ef0189ddbbef /meta/classes
parentdeb3ccec53e0bd63bc4235cf2b0d3fc781687361 (diff)
downloadopenembedded-core-contrib-081a391fe09a21265881e39a2a496e4e10b4f80b.tar.gz
classes: Add SPDX license identifiers
As stated in our top level license files, the license is MIT unless otherwise stated. Add SPDX identifers accordingly. Replace older license statementa with the standardised syntax. Also drop "All Rights Reserved" expression as it isn't used now, doesn't mean anything and is confusing. Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/classes')
-rw-r--r--meta/classes/allarch.bbclass2
-rw-r--r--meta/classes/archiver.bbclass2
-rw-r--r--meta/classes/autotools-brokensep.bbclass2
-rw-r--r--meta/classes/autotools.bbclass2
-rw-r--r--meta/classes/baremetal-image.bbclass2
-rw-r--r--meta/classes/base.bbclass2
-rw-r--r--meta/classes/bash-completion.bbclass2
-rw-r--r--meta/classes/bin_package.bbclass2
-rw-r--r--meta/classes/binconfig-disabled.bbclass2
-rw-r--r--meta/classes/binconfig.bbclass2
-rw-r--r--meta/classes/buildhistory.bbclass2
-rw-r--r--meta/classes/buildstats-summary.bbclass2
-rw-r--r--meta/classes/buildstats.bbclass2
-rw-r--r--meta/classes/cargo.bbclass2
-rw-r--r--meta/classes/cargo_common.bbclass2
-rw-r--r--meta/classes/ccache.bbclass2
-rw-r--r--meta/classes/ccmake.bbclass2
-rw-r--r--meta/classes/chrpath.bbclass2
-rw-r--r--meta/classes/cmake.bbclass2
-rw-r--r--meta/classes/cml1.bbclass2
-rw-r--r--meta/classes/compress_doc.bbclass2
-rw-r--r--meta/classes/copyleft_compliance.bbclass2
-rw-r--r--meta/classes/copyleft_filter.bbclass2
-rw-r--r--meta/classes/core-image.bbclass2
-rw-r--r--meta/classes/cpan-base.bbclass2
-rw-r--r--meta/classes/cpan.bbclass2
-rw-r--r--meta/classes/cpan_build.bbclass2
-rw-r--r--meta/classes/cross-canadian.bbclass2
-rw-r--r--meta/classes/cross.bbclass2
-rw-r--r--meta/classes/crosssdk.bbclass2
-rw-r--r--meta/classes/cve-check.bbclass2
-rw-r--r--meta/classes/debian.bbclass2
-rw-r--r--meta/classes/deploy.bbclass2
-rw-r--r--meta/classes/devicetree.bbclass2
-rw-r--r--meta/classes/devshell.bbclass2
-rw-r--r--meta/classes/devtool-source.bbclass2
-rw-r--r--meta/classes/devupstream.bbclass2
-rw-r--r--meta/classes/distro_features_check.bbclass2
-rw-r--r--meta/classes/distrooverrides.bbclass2
-rw-r--r--meta/classes/dos2unix.bbclass2
-rw-r--r--meta/classes/externalsrc.bbclass3
-rw-r--r--meta/classes/extrausers.bbclass2
-rw-r--r--meta/classes/features_check.bbclass3
-rw-r--r--meta/classes/fontcache.bbclass2
-rw-r--r--meta/classes/fs-uuid.bbclass2
-rw-r--r--meta/classes/gconf.bbclass2
-rw-r--r--meta/classes/gettext.bbclass2
-rw-r--r--meta/classes/gi-docgen.bbclass2
-rw-r--r--meta/classes/gio-module-cache.bbclass2
-rw-r--r--meta/classes/glide.bbclass2
-rw-r--r--meta/classes/gnomebase.bbclass2
-rw-r--r--meta/classes/go-mod.bbclass2
-rw-r--r--meta/classes/go-ptest.bbclass2
-rw-r--r--meta/classes/go.bbclass2
-rw-r--r--meta/classes/goarch.bbclass2
-rw-r--r--meta/classes/gobject-introspection-data.bbclass2
-rw-r--r--meta/classes/gobject-introspection.bbclass2
-rw-r--r--meta/classes/grub-efi-cfg.bbclass3
-rw-r--r--meta/classes/grub-efi.bbclass2
-rw-r--r--meta/classes/gsettings.bbclass2
-rw-r--r--meta/classes/gtk-doc.bbclass2
-rw-r--r--meta/classes/gtk-icon-cache.bbclass2
-rw-r--r--meta/classes/gtk-immodules-cache.bbclass2
-rw-r--r--meta/classes/icecc.bbclass2
-rw-r--r--meta/classes/image-artifact-names.bbclass2
-rw-r--r--meta/classes/image-buildinfo.bbclass2
-rw-r--r--meta/classes/image-combined-dbg.bbclass2
-rw-r--r--meta/classes/image-container.bbclass2
-rw-r--r--meta/classes/image-live.bbclass5
-rw-r--r--meta/classes/image-postinst-intercepts.bbclass2
-rw-r--r--meta/classes/image.bbclass2
-rw-r--r--meta/classes/image_types.bbclass2
-rw-r--r--meta/classes/image_types_wic.bbclass2
-rw-r--r--meta/classes/insane.bbclass2
-rw-r--r--meta/classes/kernel-arch.bbclass2
-rw-r--r--meta/classes/kernel-artifact-names.bbclass2
-rw-r--r--meta/classes/kernel-devicetree.bbclass2
-rw-r--r--meta/classes/kernel-fitimage.bbclass2
-rw-r--r--meta/classes/kernel-grub.bbclass2
-rw-r--r--meta/classes/kernel-module-split.bbclass2
-rw-r--r--meta/classes/kernel-uboot.bbclass2
-rw-r--r--meta/classes/kernel-uimage.bbclass2
-rw-r--r--meta/classes/kernel-yocto.bbclass2
-rw-r--r--meta/classes/kernel.bbclass2
-rw-r--r--meta/classes/kernelsrc.bbclass2
-rw-r--r--meta/classes/lib_package.bbclass2
-rw-r--r--meta/classes/libc-package.bbclass2
-rw-r--r--meta/classes/license.bbclass2
-rw-r--r--meta/classes/license_image.bbclass2
-rw-r--r--meta/classes/linux-dummy.bbclass2
-rw-r--r--meta/classes/linux-kernel-base.bbclass2
-rw-r--r--meta/classes/linuxloader.bbclass2
-rw-r--r--meta/classes/live-vm-common.bbclass2
-rw-r--r--meta/classes/logging.bbclass2
-rw-r--r--meta/classes/manpages.bbclass2
-rw-r--r--meta/classes/mcextend.bbclass2
-rw-r--r--meta/classes/meson-routines.bbclass2
-rw-r--r--meta/classes/meson.bbclass2
-rw-r--r--meta/classes/metadata_scm.bbclass2
-rw-r--r--meta/classes/migrate_localcount.bbclass2
-rw-r--r--meta/classes/mime-xdg.bbclass1
-rw-r--r--meta/classes/mime.bbclass2
-rw-r--r--meta/classes/mirrors.bbclass2
-rw-r--r--meta/classes/module-base.bbclass2
-rw-r--r--meta/classes/module.bbclass2
-rw-r--r--meta/classes/multilib.bbclass2
-rw-r--r--meta/classes/multilib_global.bbclass2
-rw-r--r--meta/classes/multilib_header.bbclass2
-rw-r--r--meta/classes/multilib_script.bbclass2
-rw-r--r--meta/classes/native.bbclass2
-rw-r--r--meta/classes/nativesdk.bbclass2
-rw-r--r--meta/classes/nopackages.bbclass2
-rw-r--r--meta/classes/oelint.bbclass2
-rw-r--r--meta/classes/overlayfs-etc.bbclass2
-rw-r--r--meta/classes/overlayfs.bbclass2
-rw-r--r--meta/classes/own-mirrors.bbclass2
-rw-r--r--meta/classes/package.bbclass2
-rw-r--r--meta/classes/package_deb.bbclass2
-rw-r--r--meta/classes/package_ipk.bbclass2
-rw-r--r--meta/classes/package_pkgdata.bbclass2
-rw-r--r--meta/classes/package_rpm.bbclass2
-rw-r--r--meta/classes/package_tar.bbclass2
-rw-r--r--meta/classes/packagedata.bbclass2
-rw-r--r--meta/classes/packagegroup.bbclass2
-rw-r--r--meta/classes/patch.bbclass2
-rw-r--r--meta/classes/perl-version.bbclass2
-rw-r--r--meta/classes/perlnative.bbclass2
-rw-r--r--meta/classes/pixbufcache.bbclass2
-rw-r--r--meta/classes/pkgconfig.bbclass2
-rw-r--r--meta/classes/populate_sdk.bbclass2
-rw-r--r--meta/classes/populate_sdk_base.bbclass2
-rw-r--r--meta/classes/populate_sdk_ext.bbclass2
-rw-r--r--meta/classes/prexport.bbclass2
-rw-r--r--meta/classes/primport.bbclass2
-rw-r--r--meta/classes/ptest-gnome.bbclass2
-rw-r--r--meta/classes/ptest-perl.bbclass2
-rw-r--r--meta/classes/ptest.bbclass2
-rw-r--r--meta/classes/pypi.bbclass2
-rw-r--r--meta/classes/python3-dir.bbclass2
-rw-r--r--meta/classes/python3native.bbclass2
-rw-r--r--meta/classes/python3targetconfig.bbclass2
-rw-r--r--meta/classes/python_flit_core.bbclass2
-rw-r--r--meta/classes/python_hatchling.bbclass2
-rw-r--r--meta/classes/python_pep517.bbclass2
-rw-r--r--meta/classes/python_poetry_core.bbclass2
-rw-r--r--meta/classes/python_pyo3.bbclass2
-rw-r--r--meta/classes/python_setuptools3_rust.bbclass2
-rw-r--r--meta/classes/python_setuptools_build_meta.bbclass2
-rw-r--r--meta/classes/qemu.bbclass2
-rw-r--r--meta/classes/qemuboot.bbclass2
-rw-r--r--meta/classes/recipe_sanity.bbclass2
-rw-r--r--meta/classes/relative_symlinks.bbclass2
-rw-r--r--meta/classes/relocatable.bbclass2
-rw-r--r--meta/classes/remove-libtool.bbclass2
-rw-r--r--meta/classes/report-error.bbclass3
-rw-r--r--meta/classes/rm_work.bbclass2
-rw-r--r--meta/classes/rm_work_and_downloads.bbclass3
-rw-r--r--meta/classes/rootfs-postcommands.bbclass2
-rw-r--r--meta/classes/rootfs_deb.bbclass2
-rw-r--r--meta/classes/rootfs_ipk.bbclass2
-rw-r--r--meta/classes/rootfs_rpm.bbclass2
-rw-r--r--meta/classes/rootfsdebugfiles.bbclass2
-rw-r--r--meta/classes/rust-bin.bbclass2
-rw-r--r--meta/classes/rust-common.bbclass2
-rw-r--r--meta/classes/rust-target-config.bbclass2
-rw-r--r--meta/classes/rust.bbclass2
-rw-r--r--meta/classes/sanity.bbclass2
-rw-r--r--meta/classes/scons.bbclass2
-rw-r--r--meta/classes/setuptools3-base.bbclass2
-rw-r--r--meta/classes/setuptools3.bbclass2
-rw-r--r--meta/classes/setuptools3_legacy.bbclass2
-rw-r--r--meta/classes/sign_ipk.bbclass2
-rw-r--r--meta/classes/sign_package_feed.bbclass2
-rw-r--r--meta/classes/sign_rpm.bbclass2
-rw-r--r--meta/classes/siteconfig.bbclass2
-rw-r--r--meta/classes/siteinfo.bbclass2
-rw-r--r--meta/classes/sstate.bbclass2
-rw-r--r--meta/classes/staging.bbclass2
-rw-r--r--meta/classes/syslinux.bbclass4
-rw-r--r--meta/classes/systemd-boot-cfg.bbclass2
-rw-r--r--meta/classes/systemd-boot.bbclass2
-rw-r--r--meta/classes/systemd.bbclass2
-rw-r--r--meta/classes/terminal.bbclass2
-rw-r--r--meta/classes/testexport.bbclass3
-rw-r--r--meta/classes/testimage.bbclass2
-rw-r--r--meta/classes/testsdk.bbclass2
-rw-r--r--meta/classes/texinfo.bbclass2
-rw-r--r--meta/classes/toaster.bbclass2
-rw-r--r--meta/classes/toolchain-scripts-base.bbclass2
-rw-r--r--meta/classes/toolchain-scripts.bbclass2
-rw-r--r--meta/classes/typecheck.bbclass2
-rw-r--r--meta/classes/uboot-config.bbclass3
-rw-r--r--meta/classes/uboot-extlinux-config.bbclass2
-rw-r--r--meta/classes/uboot-sign.bbclass2
-rw-r--r--meta/classes/uninative.bbclass2
-rw-r--r--meta/classes/update-alternatives.bbclass2
-rw-r--r--meta/classes/update-rc.d.bbclass2
-rw-r--r--meta/classes/upstream-version-is-even.bbclass2
-rw-r--r--meta/classes/useradd-staticids.bbclass2
-rw-r--r--meta/classes/useradd.bbclass2
-rw-r--r--meta/classes/useradd_base.bbclass2
-rw-r--r--meta/classes/utility-tasks.bbclass2
-rw-r--r--meta/classes/utils.bbclass2
-rw-r--r--meta/classes/vala.bbclass2
-rw-r--r--meta/classes/waf.bbclass2
-rw-r--r--meta/classes/xmlcatalog.bbclass2
-rw-r--r--meta/classes/yocto-check-layer.bbclass2
207 files changed, 407 insertions, 18 deletions
diff --git a/meta/classes/allarch.bbclass b/meta/classes/allarch.bbclass
index 630cd070f6..9138f40ed8 100644
--- a/meta/classes/allarch.bbclass
+++ b/meta/classes/allarch.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# This class is used for architecture independent recipes/data files (usually scripts)
diff --git a/meta/classes/archiver.bbclass b/meta/classes/archiver.bbclass
index c1f403fb69..8eb15af393 100644
--- a/meta/classes/archiver.bbclass
+++ b/meta/classes/archiver.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# This bbclass is used for creating archive for:
diff --git a/meta/classes/autotools-brokensep.bbclass b/meta/classes/autotools-brokensep.bbclass
index ac9a8d07c9..a0fb4b7b50 100644
--- a/meta/classes/autotools-brokensep.bbclass
+++ b/meta/classes/autotools-brokensep.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Autotools class for recipes where separate build dir doesn't work
# Ideally we should fix software so it does work. Standard autotools supports
diff --git a/meta/classes/autotools.bbclass b/meta/classes/autotools.bbclass
index c77ba71a3a..a4c1c4be41 100644
--- a/meta/classes/autotools.bbclass
+++ b/meta/classes/autotools.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
def get_autotools_dep(d):
if d.getVar('INHIBIT_AUTOTOOLS_DEPS'):
diff --git a/meta/classes/baremetal-image.bbclass b/meta/classes/baremetal-image.bbclass
index 10ca390c48..3a979f2ed1 100644
--- a/meta/classes/baremetal-image.bbclass
+++ b/meta/classes/baremetal-image.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Baremetal image class
#
diff --git a/meta/classes/base.bbclass b/meta/classes/base.bbclass
index 1aa0978f65..8203f54519 100644
--- a/meta/classes/base.bbclass
+++ b/meta/classes/base.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
BB_DEFAULT_TASK ?= "build"
CLASSOVERRIDE ?= "class-target"
diff --git a/meta/classes/bash-completion.bbclass b/meta/classes/bash-completion.bbclass
index cefd7dd18d..b656e76c09 100644
--- a/meta/classes/bash-completion.bbclass
+++ b/meta/classes/bash-completion.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
DEPENDS:append:class-target = " bash-completion"
diff --git a/meta/classes/bin_package.bbclass b/meta/classes/bin_package.bbclass
index 9d1b6101d1..3a1befc29c 100644
--- a/meta/classes/bin_package.bbclass
+++ b/meta/classes/bin_package.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Common variable and task for the binary package recipe.
# Basic principle:
diff --git a/meta/classes/binconfig-disabled.bbclass b/meta/classes/binconfig-disabled.bbclass
index c8f76b790b..cbe2078e0f 100644
--- a/meta/classes/binconfig-disabled.bbclass
+++ b/meta/classes/binconfig-disabled.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# Class to disable binconfig files instead of installing them
diff --git a/meta/classes/binconfig.bbclass b/meta/classes/binconfig.bbclass
index f50ed36d50..427dba7f1f 100644
--- a/meta/classes/binconfig.bbclass
+++ b/meta/classes/binconfig.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
FILES:${PN}-dev += "${bindir}/*-config"
diff --git a/meta/classes/buildhistory.bbclass b/meta/classes/buildhistory.bbclass
index 35db2b1192..395f594278 100644
--- a/meta/classes/buildhistory.bbclass
+++ b/meta/classes/buildhistory.bbclass
@@ -6,6 +6,8 @@
# Copyright (C) 2011-2016 Intel Corporation
# Copyright (C) 2007-2011 Koen Kooi <koen@openembedded.org>
#
+# SPDX-License-Identifier: MIT
+#
IMAGE_CLASSES += "image-artifact-names"
diff --git a/meta/classes/buildstats-summary.bbclass b/meta/classes/buildstats-summary.bbclass
index 716189fd30..12e8f17836 100644
--- a/meta/classes/buildstats-summary.bbclass
+++ b/meta/classes/buildstats-summary.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Summarize sstate usage at the end of the build
python buildstats_summary () {
diff --git a/meta/classes/buildstats.bbclass b/meta/classes/buildstats.bbclass
index 0e4e340ad1..f49a67aa4f 100644
--- a/meta/classes/buildstats.bbclass
+++ b/meta/classes/buildstats.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
BUILDSTATS_BASE = "${TMPDIR}/buildstats/"
diff --git a/meta/classes/cargo.bbclass b/meta/classes/cargo.bbclass
index d36c3d5071..d1e83518b5 100644
--- a/meta/classes/cargo.bbclass
+++ b/meta/classes/cargo.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
##
## Purpose:
diff --git a/meta/classes/cargo_common.bbclass b/meta/classes/cargo_common.bbclass
index 51b1ebb77f..eec7710a4c 100644
--- a/meta/classes/cargo_common.bbclass
+++ b/meta/classes/cargo_common.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
##
## Purpose:
diff --git a/meta/classes/ccache.bbclass b/meta/classes/ccache.bbclass
index dee6248017..34becb69d1 100644
--- a/meta/classes/ccache.bbclass
+++ b/meta/classes/ccache.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# Usage:
diff --git a/meta/classes/ccmake.bbclass b/meta/classes/ccmake.bbclass
index 75f68cc8e3..c5b4bf6260 100644
--- a/meta/classes/ccmake.bbclass
+++ b/meta/classes/ccmake.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit terminal
diff --git a/meta/classes/chrpath.bbclass b/meta/classes/chrpath.bbclass
index 930c53e76f..1aecb4df66 100644
--- a/meta/classes/chrpath.bbclass
+++ b/meta/classes/chrpath.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
CHRPATH_BIN ?= "chrpath"
PREPROCESS_RELOCATE_DIRS ?= ""
diff --git a/meta/classes/cmake.bbclass b/meta/classes/cmake.bbclass
index cd7031b82d..554b948c32 100644
--- a/meta/classes/cmake.bbclass
+++ b/meta/classes/cmake.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Path to the CMake file to process.
OECMAKE_SOURCEPATH ??= "${S}"
diff --git a/meta/classes/cml1.bbclass b/meta/classes/cml1.bbclass
index 8c21dff4d2..b79091383d 100644
--- a/meta/classes/cml1.bbclass
+++ b/meta/classes/cml1.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# returns all the elements from the src uri that are .cfg files
def find_cfgs(d):
diff --git a/meta/classes/compress_doc.bbclass b/meta/classes/compress_doc.bbclass
index 2298b6ed0c..d603caf858 100644
--- a/meta/classes/compress_doc.bbclass
+++ b/meta/classes/compress_doc.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Compress man pages in ${mandir} and info pages in ${infodir}
#
diff --git a/meta/classes/copyleft_compliance.bbclass b/meta/classes/copyleft_compliance.bbclass
index 5bf16a9106..9ff9956fe9 100644
--- a/meta/classes/copyleft_compliance.bbclass
+++ b/meta/classes/copyleft_compliance.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Deploy sources for recipes for compliance with copyleft-style licenses
# Defaults to using symlinks, as it's a quick operation, and one can easily
diff --git a/meta/classes/copyleft_filter.bbclass b/meta/classes/copyleft_filter.bbclass
index 0e93a3df42..83cd90060d 100644
--- a/meta/classes/copyleft_filter.bbclass
+++ b/meta/classes/copyleft_filter.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Filter the license, the copyleft_should_include returns True for the
# COPYLEFT_LICENSE_INCLUDE recipe, and False for the
diff --git a/meta/classes/core-image.bbclass b/meta/classes/core-image.bbclass
index 84fd3eeb38..7ef7d07390 100644
--- a/meta/classes/core-image.bbclass
+++ b/meta/classes/core-image.bbclass
@@ -1,6 +1,8 @@
# Common code for generating core reference images
#
# Copyright (C) 2007-2011 Linux Foundation
+#
+# SPDX-License-Identifier: MIT
# IMAGE_FEATURES control content of the core reference images
#
diff --git a/meta/classes/cpan-base.bbclass b/meta/classes/cpan-base.bbclass
index 2c53eed3c4..1db0a4ded6 100644
--- a/meta/classes/cpan-base.bbclass
+++ b/meta/classes/cpan-base.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# cpan-base providers various perl related information needed for building
diff --git a/meta/classes/cpan.bbclass b/meta/classes/cpan.bbclass
index 7ab33423c9..bb76a5b326 100644
--- a/meta/classes/cpan.bbclass
+++ b/meta/classes/cpan.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# This is for perl modules that use the old Makefile.PL build system
diff --git a/meta/classes/cpan_build.bbclass b/meta/classes/cpan_build.bbclass
index 0ad7d0b3c9..026859b6c7 100644
--- a/meta/classes/cpan_build.bbclass
+++ b/meta/classes/cpan_build.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# This is for perl modules that use the new Build.PL build system
diff --git a/meta/classes/cross-canadian.bbclass b/meta/classes/cross-canadian.bbclass
index 23c864f684..1670217d69 100644
--- a/meta/classes/cross-canadian.bbclass
+++ b/meta/classes/cross-canadian.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# NOTE - When using this class the user is responsible for ensuring that
# TRANSLATED_TARGET_ARCH is added into PN. This ensures that if the TARGET_ARCH
# is changed, another nativesdk xxx-canadian-cross can be installed
diff --git a/meta/classes/cross.bbclass b/meta/classes/cross.bbclass
index 5ed21302ce..93de9a5274 100644
--- a/meta/classes/cross.bbclass
+++ b/meta/classes/cross.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit relocatable
diff --git a/meta/classes/crosssdk.bbclass b/meta/classes/crosssdk.bbclass
index 3c5a1a3717..824b1bcff4 100644
--- a/meta/classes/crosssdk.bbclass
+++ b/meta/classes/crosssdk.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit cross
diff --git a/meta/classes/cve-check.bbclass b/meta/classes/cve-check.bbclass
index 53790e89d1..d95465775d 100644
--- a/meta/classes/cve-check.bbclass
+++ b/meta/classes/cve-check.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# This class is used to check recipes against public CVEs.
#
diff --git a/meta/classes/debian.bbclass b/meta/classes/debian.bbclass
index 2fd1b987dc..7135d74837 100644
--- a/meta/classes/debian.bbclass
+++ b/meta/classes/debian.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Debian package renaming only occurs when a package is built
# We therefore have to make sure we build all runtime packages
diff --git a/meta/classes/deploy.bbclass b/meta/classes/deploy.bbclass
index 7c28e6934c..f56fe98d6d 100644
--- a/meta/classes/deploy.bbclass
+++ b/meta/classes/deploy.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
DEPLOYDIR = "${WORKDIR}/deploy-${PN}"
SSTATETASKS += "do_deploy"
diff --git a/meta/classes/devicetree.bbclass b/meta/classes/devicetree.bbclass
index 954582bcd3..ac1d284ccd 100644
--- a/meta/classes/devicetree.bbclass
+++ b/meta/classes/devicetree.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# This bbclass implements device tree compliation for user provided device tree
# sources. The compilation of the device tree sources is the same as the kernel
diff --git a/meta/classes/devshell.bbclass b/meta/classes/devshell.bbclass
index 4545d988c1..03af56b7a2 100644
--- a/meta/classes/devshell.bbclass
+++ b/meta/classes/devshell.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit terminal
diff --git a/meta/classes/devtool-source.bbclass b/meta/classes/devtool-source.bbclass
index 7a4568a0e4..a02b1e9b0e 100644
--- a/meta/classes/devtool-source.bbclass
+++ b/meta/classes/devtool-source.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Development tool - source extraction helper class
#
diff --git a/meta/classes/devupstream.bbclass b/meta/classes/devupstream.bbclass
index ad1061b4d1..1529cc8fca 100644
--- a/meta/classes/devupstream.bbclass
+++ b/meta/classes/devupstream.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Class for use in BBCLASSEXTEND to make it easier to have a single recipe that
# can build both stable tarballs and snapshots from upstream source
diff --git a/meta/classes/distro_features_check.bbclass b/meta/classes/distro_features_check.bbclass
index db26c60fab..1f2674fd6e 100644
--- a/meta/classes/distro_features_check.bbclass
+++ b/meta/classes/distro_features_check.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Temporarily provide fallback to the old name of the class
diff --git a/meta/classes/distrooverrides.bbclass b/meta/classes/distrooverrides.bbclass
index d5f3a06af4..8d9d7cda7d 100644
--- a/meta/classes/distrooverrides.bbclass
+++ b/meta/classes/distrooverrides.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Turns certain DISTRO_FEATURES into overrides with the same
# name plus a df- prefix. Ensures that these special
diff --git a/meta/classes/dos2unix.bbclass b/meta/classes/dos2unix.bbclass
index b02db9b23a..18e89b1cf2 100644
--- a/meta/classes/dos2unix.bbclass
+++ b/meta/classes/dos2unix.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Class for use to convert all CRLF line terminators to LF
# provided that some projects are being developed/maintained
diff --git a/meta/classes/externalsrc.bbclass b/meta/classes/externalsrc.bbclass
index 90792a737b..51dbe9ea5a 100644
--- a/meta/classes/externalsrc.bbclass
+++ b/meta/classes/externalsrc.bbclass
@@ -2,7 +2,8 @@
# Author: Richard Purdie
# Some code and influence taken from srctree.bbclass:
# Copyright (C) 2009 Chris Larson <clarson@kergoth.com>
-# Released under the MIT license (see COPYING.MIT for the terms)
+#
+# SPDX-License-Identifier: MIT
#
# externalsrc.bbclass enables use of an existing source tree, usually external to
# the build system to build a piece of software rather than the usual fetch/unpack/patch
diff --git a/meta/classes/extrausers.bbclass b/meta/classes/extrausers.bbclass
index e4059872d8..94576b8872 100644
--- a/meta/classes/extrausers.bbclass
+++ b/meta/classes/extrausers.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# This bbclass is used for image level user/group configuration.
# Inherit this class if you want to make EXTRA_USERS_PARAMS effective.
diff --git a/meta/classes/features_check.bbclass b/meta/classes/features_check.bbclass
index 3ef6b35baa..163a7bc3fc 100644
--- a/meta/classes/features_check.bbclass
+++ b/meta/classes/features_check.bbclass
@@ -11,6 +11,9 @@
#
# Copyright 2019 (C) Texas Instruments Inc.
# Copyright 2013 (C) O.S. Systems Software LTDA.
+#
+# SPDX-License-Identifier: MIT
+
python () {
if d.getVar('PARSE_ALL_RECIPES', False):
diff --git a/meta/classes/fontcache.bbclass b/meta/classes/fontcache.bbclass
index 2ca51c5337..0d496b72dd 100644
--- a/meta/classes/fontcache.bbclass
+++ b/meta/classes/fontcache.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# This class will generate the proper postinst/postrm scriptlets for font
diff --git a/meta/classes/fs-uuid.bbclass b/meta/classes/fs-uuid.bbclass
index 93a3e420d5..a9e7eb8c67 100644
--- a/meta/classes/fs-uuid.bbclass
+++ b/meta/classes/fs-uuid.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Extract UUID from ${ROOTFS}, which must have been built
# by the time that this function gets called. Only works
diff --git a/meta/classes/gconf.bbclass b/meta/classes/gconf.bbclass
index d4d94583ab..b81851bc78 100644
--- a/meta/classes/gconf.bbclass
+++ b/meta/classes/gconf.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
DEPENDS += "gconf"
PACKAGE_WRITE_DEPS += "gconf-native"
diff --git a/meta/classes/gettext.bbclass b/meta/classes/gettext.bbclass
index 4aecbb4413..c313885d52 100644
--- a/meta/classes/gettext.bbclass
+++ b/meta/classes/gettext.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
def gettext_dependencies(d):
if d.getVar('INHIBIT_DEFAULT_DEPS') and not oe.utils.inherits(d, 'cross-canadian'):
diff --git a/meta/classes/gi-docgen.bbclass b/meta/classes/gi-docgen.bbclass
index 3a3966c801..8b7eaacea3 100644
--- a/meta/classes/gi-docgen.bbclass
+++ b/meta/classes/gi-docgen.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# gi-docgen is a new gnome documentation generator, which
# seems to be a successor to gtk-doc:
diff --git a/meta/classes/gio-module-cache.bbclass b/meta/classes/gio-module-cache.bbclass
index 788ca99c1c..d12e03c4a0 100644
--- a/meta/classes/gio-module-cache.bbclass
+++ b/meta/classes/gio-module-cache.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
PACKAGE_WRITE_DEPS += "qemu-native"
inherit qemu
diff --git a/meta/classes/glide.bbclass b/meta/classes/glide.bbclass
index ee073b9fbd..21b48fa4e0 100644
--- a/meta/classes/glide.bbclass
+++ b/meta/classes/glide.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Handle Glide Vendor Package Management use
#
diff --git a/meta/classes/gnomebase.bbclass b/meta/classes/gnomebase.bbclass
index d424091bc0..805daafa40 100644
--- a/meta/classes/gnomebase.bbclass
+++ b/meta/classes/gnomebase.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
def gnome_verdir(v):
return ".".join(v.split(".")[:-1])
diff --git a/meta/classes/go-mod.bbclass b/meta/classes/go-mod.bbclass
index a428471e3a..927746a338 100644
--- a/meta/classes/go-mod.bbclass
+++ b/meta/classes/go-mod.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Handle Go Modules support
#
diff --git a/meta/classes/go-ptest.bbclass b/meta/classes/go-ptest.bbclass
index 2493b305a5..54fcbb535d 100644
--- a/meta/classes/go-ptest.bbclass
+++ b/meta/classes/go-ptest.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit go ptest
diff --git a/meta/classes/go.bbclass b/meta/classes/go.bbclass
index d86c5859b8..6b9748406d 100644
--- a/meta/classes/go.bbclass
+++ b/meta/classes/go.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit goarch
inherit linuxloader
diff --git a/meta/classes/goarch.bbclass b/meta/classes/goarch.bbclass
index 0bfc1c1e0d..61ead30a63 100644
--- a/meta/classes/goarch.bbclass
+++ b/meta/classes/goarch.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
BUILD_GOOS = "${@go_map_os(d.getVar('BUILD_OS'), d)}"
BUILD_GOARCH = "${@go_map_arch(d.getVar('BUILD_ARCH'), d)}"
diff --git a/meta/classes/gobject-introspection-data.bbclass b/meta/classes/gobject-introspection-data.bbclass
index 8ec2cfe4e6..7f522a1ed3 100644
--- a/meta/classes/gobject-introspection-data.bbclass
+++ b/meta/classes/gobject-introspection-data.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# This variable is set to True if gobject-introspection-data is in
# DISTRO_FEATURES and qemu-usermode is in MACHINE_FEATURES, and False otherwise.
diff --git a/meta/classes/gobject-introspection.bbclass b/meta/classes/gobject-introspection.bbclass
index 91b728214a..0c7b7d200a 100644
--- a/meta/classes/gobject-introspection.bbclass
+++ b/meta/classes/gobject-introspection.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Inherit this class in recipes to enable building their introspection files
diff --git a/meta/classes/grub-efi-cfg.bbclass b/meta/classes/grub-efi-cfg.bbclass
index ea21b3de3d..52e85a3bb0 100644
--- a/meta/classes/grub-efi-cfg.bbclass
+++ b/meta/classes/grub-efi-cfg.bbclass
@@ -1,8 +1,7 @@
# grub-efi.bbclass
# Copyright (c) 2011, Intel Corporation.
-# All rights reserved.
#
-# Released under the MIT license (see packages/COPYING)
+# SPDX-License-Identifier: MIT
# Provide grub-efi specific functions for building bootable images.
diff --git a/meta/classes/grub-efi.bbclass b/meta/classes/grub-efi.bbclass
index 79049440bf..4afd12195f 100644
--- a/meta/classes/grub-efi.bbclass
+++ b/meta/classes/grub-efi.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit grub-efi-cfg
require conf/image-uefi.conf
diff --git a/meta/classes/gsettings.bbclass b/meta/classes/gsettings.bbclass
index d811a0e034..adb027ea0a 100644
--- a/meta/classes/gsettings.bbclass
+++ b/meta/classes/gsettings.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# A bbclass to handle installed GSettings (glib) schemas, updated the compiled
# form on package install and remove.
diff --git a/meta/classes/gtk-doc.bbclass b/meta/classes/gtk-doc.bbclass
index a32901305c..68fa2cc745 100644
--- a/meta/classes/gtk-doc.bbclass
+++ b/meta/classes/gtk-doc.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Helper class to pull in the right gtk-doc dependencies and configure
# gtk-doc to enable or disable documentation building (which requries the
diff --git a/meta/classes/gtk-icon-cache.bbclass b/meta/classes/gtk-icon-cache.bbclass
index 399d107ce7..17c7eb7a33 100644
--- a/meta/classes/gtk-icon-cache.bbclass
+++ b/meta/classes/gtk-icon-cache.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
FILES:${PN} += "${datadir}/icons/hicolor"
diff --git a/meta/classes/gtk-immodules-cache.bbclass b/meta/classes/gtk-immodules-cache.bbclass
index 97e9162fa7..8fbe1dd1fb 100644
--- a/meta/classes/gtk-immodules-cache.bbclass
+++ b/meta/classes/gtk-immodules-cache.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# This class will update the inputmethod module cache for virtual keyboards
#
diff --git a/meta/classes/icecc.bbclass b/meta/classes/icecc.bbclass
index cf08db8cf3..a11e781f00 100644
--- a/meta/classes/icecc.bbclass
+++ b/meta/classes/icecc.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# IceCream distributed compiling support
#
diff --git a/meta/classes/image-artifact-names.bbclass b/meta/classes/image-artifact-names.bbclass
index 425683a7e1..5c4e746b90 100644
--- a/meta/classes/image-artifact-names.bbclass
+++ b/meta/classes/image-artifact-names.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
##################################################################
# Specific image creation and rootfs population info.
diff --git a/meta/classes/image-buildinfo.bbclass b/meta/classes/image-buildinfo.bbclass
index ef790bb73b..206cc9d57d 100644
--- a/meta/classes/image-buildinfo.bbclass
+++ b/meta/classes/image-buildinfo.bbclass
@@ -4,7 +4,7 @@
# Copyright (C) 2014 Intel Corporation
# Author: Alejandro Enedino Hernandez Samaniego <alejandro.hernandez@intel.com>
#
-# Licensed under the MIT license, see COPYING.MIT for details
+# SPDX-License-Identifier: MIT
#
# Usage: add INHERIT += "image-buildinfo" to your conf file
#
diff --git a/meta/classes/image-combined-dbg.bbclass b/meta/classes/image-combined-dbg.bbclass
index 0e8e8183ac..dcf1968538 100644
--- a/meta/classes/image-combined-dbg.bbclass
+++ b/meta/classes/image-combined-dbg.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
IMAGE_PREPROCESS_COMMAND:append = " combine_dbg_image; "
diff --git a/meta/classes/image-container.bbclass b/meta/classes/image-container.bbclass
index 10036151c0..d24b030453 100644
--- a/meta/classes/image-container.bbclass
+++ b/meta/classes/image-container.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
ROOTFS_BOOTSTRAP_INSTALL = ""
IMAGE_TYPES_MASKED += "container"
diff --git a/meta/classes/image-live.bbclass b/meta/classes/image-live.bbclass
index 2c948190cf..1034acc49e 100644
--- a/meta/classes/image-live.bbclass
+++ b/meta/classes/image-live.bbclass
@@ -1,5 +1,6 @@
-# Copyright (C) 2004, Advanced Micro Devices, Inc. All Rights Reserved
-# Released under the MIT license (see packages/COPYING)
+# Copyright (C) 2004, Advanced Micro Devices, Inc.
+#
+# SPDX-License-Identifier: MIT
# Creates a bootable image using syslinux, your kernel and an optional
# initrd
diff --git a/meta/classes/image-postinst-intercepts.bbclass b/meta/classes/image-postinst-intercepts.bbclass
index af81910bc7..fc15926384 100644
--- a/meta/classes/image-postinst-intercepts.bbclass
+++ b/meta/classes/image-postinst-intercepts.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Gather existing and candidate postinst intercepts from BBPATH
POSTINST_INTERCEPTS_DIR ?= "${COREBASE}/scripts/postinst-intercepts"
diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass
index 816a76ad73..433172378a 100644
--- a/meta/classes/image.bbclass
+++ b/meta/classes/image.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
IMAGE_CLASSES ??= ""
diff --git a/meta/classes/image_types.bbclass b/meta/classes/image_types.bbclass
index c6c44db7c7..a731e585b2 100644
--- a/meta/classes/image_types.bbclass
+++ b/meta/classes/image_types.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# The default aligment of the size of the rootfs is set to 1KiB. In case
# you're using the SD card emulation of a QEMU system simulator you may
diff --git a/meta/classes/image_types_wic.bbclass b/meta/classes/image_types_wic.bbclass
index e388fa6797..c339b9bdfb 100644
--- a/meta/classes/image_types_wic.bbclass
+++ b/meta/classes/image_types_wic.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# The WICVARS variable is used to define list of bitbake variables used in wic code
# variables from this list is written to <image>.env file
diff --git a/meta/classes/insane.bbclass b/meta/classes/insane.bbclass
index f6a82cc44f..176a42fd0d 100644
--- a/meta/classes/insane.bbclass
+++ b/meta/classes/insane.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# BB Class inspired by ebuild.sh
#
diff --git a/meta/classes/kernel-arch.bbclass b/meta/classes/kernel-arch.bbclass
index f25ad44a3d..6f5d3bde6c 100644
--- a/meta/classes/kernel-arch.bbclass
+++ b/meta/classes/kernel-arch.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# set the ARCH environment variable for kernel compilation (including
diff --git a/meta/classes/kernel-artifact-names.bbclass b/meta/classes/kernel-artifact-names.bbclass
index ce58e2af63..311075c68d 100644
--- a/meta/classes/kernel-artifact-names.bbclass
+++ b/meta/classes/kernel-artifact-names.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
##################################################################
# Specific kernel creation info
diff --git a/meta/classes/kernel-devicetree.bbclass b/meta/classes/kernel-devicetree.bbclass
index 28330151ec..b2117de805 100644
--- a/meta/classes/kernel-devicetree.bbclass
+++ b/meta/classes/kernel-devicetree.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Support for device tree generation
python () {
diff --git a/meta/classes/kernel-fitimage.bbclass b/meta/classes/kernel-fitimage.bbclass
index a0d2e444b2..838ce204cb 100644
--- a/meta/classes/kernel-fitimage.bbclass
+++ b/meta/classes/kernel-fitimage.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit kernel-uboot kernel-artifact-names uboot-sign
diff --git a/meta/classes/kernel-grub.bbclass b/meta/classes/kernel-grub.bbclass
index 8475e0f9da..2325e635e1 100644
--- a/meta/classes/kernel-grub.bbclass
+++ b/meta/classes/kernel-grub.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# While installing a rpm to update kernel on a deployed target, it will update
diff --git a/meta/classes/kernel-module-split.bbclass b/meta/classes/kernel-module-split.bbclass
index df18f5d0f0..1b4c864a63 100644
--- a/meta/classes/kernel-module-split.bbclass
+++ b/meta/classes/kernel-module-split.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
pkg_postinst:modules () {
if [ -z "$D" ]; then
diff --git a/meta/classes/kernel-uboot.bbclass b/meta/classes/kernel-uboot.bbclass
index 9eb934919b..4aab02671e 100644
--- a/meta/classes/kernel-uboot.bbclass
+++ b/meta/classes/kernel-uboot.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# fitImage kernel compression algorithm
FIT_KERNEL_COMP_ALG ?= "gzip"
diff --git a/meta/classes/kernel-uimage.bbclass b/meta/classes/kernel-uimage.bbclass
index 8cc1dc50cc..1a599e656c 100644
--- a/meta/classes/kernel-uimage.bbclass
+++ b/meta/classes/kernel-uimage.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit kernel-uboot
diff --git a/meta/classes/kernel-yocto.bbclass b/meta/classes/kernel-yocto.bbclass
index 9f327933a1..8eda0dcaf3 100644
--- a/meta/classes/kernel-yocto.bbclass
+++ b/meta/classes/kernel-yocto.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# remove tasks that modify the source tree in case externalsrc is inherited
SRCTREECOVEREDTASKS += "do_validate_branches do_kernel_configcheck do_kernel_checkout do_fetch do_unpack do_patch"
diff --git a/meta/classes/kernel.bbclass b/meta/classes/kernel.bbclass
index 209a7d13cd..3463179395 100644
--- a/meta/classes/kernel.bbclass
+++ b/meta/classes/kernel.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit linux-kernel-base kernel-module-split
diff --git a/meta/classes/kernelsrc.bbclass b/meta/classes/kernelsrc.bbclass
index f40e3c8819..a32882a5d2 100644
--- a/meta/classes/kernelsrc.bbclass
+++ b/meta/classes/kernelsrc.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
S = "${STAGING_KERNEL_DIR}"
deltask do_fetch
diff --git a/meta/classes/lib_package.bbclass b/meta/classes/lib_package.bbclass
index 07f3f258d2..6d110155e5 100644
--- a/meta/classes/lib_package.bbclass
+++ b/meta/classes/lib_package.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# ${PN}-bin is defined in bitbake.conf
#
diff --git a/meta/classes/libc-package.bbclass b/meta/classes/libc-package.bbclass
index 580c02948e..de3d4223a8 100644
--- a/meta/classes/libc-package.bbclass
+++ b/meta/classes/libc-package.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# This class knows how to package up [e]glibc. Its shared since prebuild binary toolchains
diff --git a/meta/classes/license.bbclass b/meta/classes/license.bbclass
index f08bacff12..560acb8b6f 100644
--- a/meta/classes/license.bbclass
+++ b/meta/classes/license.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Populates LICENSE_DIRECTORY as set in distro config with the license files as set by
# LIC_FILES_CHKSUM.
diff --git a/meta/classes/license_image.bbclass b/meta/classes/license_image.bbclass
index 0cda839c94..b60d6e44f4 100644
--- a/meta/classes/license_image.bbclass
+++ b/meta/classes/license_image.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
ROOTFS_LICENSE_DIR = "${IMAGE_ROOTFS}/usr/share/common-licenses"
diff --git a/meta/classes/linux-dummy.bbclass b/meta/classes/linux-dummy.bbclass
index 90b932c590..9291533cf9 100644
--- a/meta/classes/linux-dummy.bbclass
+++ b/meta/classes/linux-dummy.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
python __anonymous () {
if d.getVar('PREFERRED_PROVIDER_virtual/kernel') == 'linux-dummy':
diff --git a/meta/classes/linux-kernel-base.bbclass b/meta/classes/linux-kernel-base.bbclass
index 36f9caac69..cb2212c948 100644
--- a/meta/classes/linux-kernel-base.bbclass
+++ b/meta/classes/linux-kernel-base.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# parse kernel ABI version out of <linux/version.h>
def get_kernelversion_headers(p):
diff --git a/meta/classes/linuxloader.bbclass b/meta/classes/linuxloader.bbclass
index 6bd8a62da9..1dfb95e31d 100644
--- a/meta/classes/linuxloader.bbclass
+++ b/meta/classes/linuxloader.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
def get_musl_loader_arch(d):
import re
diff --git a/meta/classes/live-vm-common.bbclass b/meta/classes/live-vm-common.bbclass
index 99b92b6155..b619f3a4be 100644
--- a/meta/classes/live-vm-common.bbclass
+++ b/meta/classes/live-vm-common.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Some of the vars for vm and live image are conflicted, this function
# is used for fixing the problem.
diff --git a/meta/classes/logging.bbclass b/meta/classes/logging.bbclass
index 0d59ae2631..ce03abfe42 100644
--- a/meta/classes/logging.bbclass
+++ b/meta/classes/logging.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# The following logging mechanisms are to be used in bash functions of recipes.
# They are intended to map one to one in intention and output format with the
diff --git a/meta/classes/manpages.bbclass b/meta/classes/manpages.bbclass
index 57b9be0650..693fb53671 100644
--- a/meta/classes/manpages.bbclass
+++ b/meta/classes/manpages.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Inherit this class to enable or disable building and installation of manpages
# depending on whether 'api-documentation' is in DISTRO_FEATURES. Such building
diff --git a/meta/classes/mcextend.bbclass b/meta/classes/mcextend.bbclass
index 33833c3b9e..a489eeb3c7 100644
--- a/meta/classes/mcextend.bbclass
+++ b/meta/classes/mcextend.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
python mcextend_virtclass_handler () {
cls = e.data.getVar("BBEXTENDCURR")
diff --git a/meta/classes/meson-routines.bbclass b/meta/classes/meson-routines.bbclass
index 6827bdb21d..6086fce9d9 100644
--- a/meta/classes/meson-routines.bbclass
+++ b/meta/classes/meson-routines.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit siteinfo
diff --git a/meta/classes/meson.bbclass b/meta/classes/meson.bbclass
index 17c6abbd60..765e81bc4f 100644
--- a/meta/classes/meson.bbclass
+++ b/meta/classes/meson.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit python3native meson-routines qemu
diff --git a/meta/classes/metadata_scm.bbclass b/meta/classes/metadata_scm.bbclass
index f17cdcccf1..6842119b6b 100644
--- a/meta/classes/metadata_scm.bbclass
+++ b/meta/classes/metadata_scm.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
METADATA_BRANCH := "${@oe.buildcfg.detect_branch(d)}"
METADATA_BRANCH[vardepvalue] = "${METADATA_BRANCH}"
diff --git a/meta/classes/migrate_localcount.bbclass b/meta/classes/migrate_localcount.bbclass
index cb0d1c698b..1d00c110e2 100644
--- a/meta/classes/migrate_localcount.bbclass
+++ b/meta/classes/migrate_localcount.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
PRSERV_DUMPDIR ??= "${LOG_DIR}/db"
LOCALCOUNT_DUMPFILE ??= "${PRSERV_DUMPDIR}/prserv-localcount-exports.inc"
diff --git a/meta/classes/mime-xdg.bbclass b/meta/classes/mime-xdg.bbclass
index 9e596c25fe..cbdcb4c7e9 100644
--- a/meta/classes/mime-xdg.bbclass
+++ b/meta/classes/mime-xdg.bbclass
@@ -1,6 +1,7 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
#
# This class creates mime <-> application associations based on entry
# 'MimeType' in *.desktop files
diff --git a/meta/classes/mime.bbclass b/meta/classes/mime.bbclass
index e036bb23a1..9b13f62bda 100644
--- a/meta/classes/mime.bbclass
+++ b/meta/classes/mime.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# This class is used by recipes installing mime types
diff --git a/meta/classes/mirrors.bbclass b/meta/classes/mirrors.bbclass
index e56f90a7e8..9643b31a23 100644
--- a/meta/classes/mirrors.bbclass
+++ b/meta/classes/mirrors.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
MIRRORS += "\
${DEBIAN_MIRROR} http://snapshot.debian.org/archive/debian/20180310T215105Z/pool \
diff --git a/meta/classes/module-base.bbclass b/meta/classes/module-base.bbclass
index 3f3d60947e..094b563b1a 100644
--- a/meta/classes/module-base.bbclass
+++ b/meta/classes/module-base.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit kernel-arch
diff --git a/meta/classes/module.bbclass b/meta/classes/module.bbclass
index bcc46ab1d8..d52d5e3098 100644
--- a/meta/classes/module.bbclass
+++ b/meta/classes/module.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit module-base kernel-module-split pkgconfig
diff --git a/meta/classes/multilib.bbclass b/meta/classes/multilib.bbclass
index 2931aed834..10a4ef9c37 100644
--- a/meta/classes/multilib.bbclass
+++ b/meta/classes/multilib.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
python multilib_virtclass_handler () {
cls = e.data.getVar("BBEXTENDCURR")
diff --git a/meta/classes/multilib_global.bbclass b/meta/classes/multilib_global.bbclass
index 7d9f48e9d9..dcd89b2f63 100644
--- a/meta/classes/multilib_global.bbclass
+++ b/meta/classes/multilib_global.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
def preferred_ml_updates(d):
# If any of PREFERRED_PROVIDER, PREFERRED_RPROVIDER, REQUIRED_VERSION
diff --git a/meta/classes/multilib_header.bbclass b/meta/classes/multilib_header.bbclass
index 403a24667b..33f7e027f0 100644
--- a/meta/classes/multilib_header.bbclass
+++ b/meta/classes/multilib_header.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit siteinfo
diff --git a/meta/classes/multilib_script.bbclass b/meta/classes/multilib_script.bbclass
index 0cf6d502bb..7011526254 100644
--- a/meta/classes/multilib_script.bbclass
+++ b/meta/classes/multilib_script.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# Recipe needs to set MULTILIB_SCRIPTS in the form <pkgname>:<scriptname>, e.g.
diff --git a/meta/classes/native.bbclass b/meta/classes/native.bbclass
index 1d9c3a7266..61ad053def 100644
--- a/meta/classes/native.bbclass
+++ b/meta/classes/native.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# We want native packages to be relocatable
inherit relocatable
diff --git a/meta/classes/nativesdk.bbclass b/meta/classes/nativesdk.bbclass
index 78f94c79ca..08288fdb73 100644
--- a/meta/classes/nativesdk.bbclass
+++ b/meta/classes/nativesdk.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# SDK packages are built either explicitly by the user,
# or indirectly via dependency. No need to be in 'world'.
diff --git a/meta/classes/nopackages.bbclass b/meta/classes/nopackages.bbclass
index 22017524cd..9ea7273530 100644
--- a/meta/classes/nopackages.bbclass
+++ b/meta/classes/nopackages.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
deltask do_package
deltask do_package_write_rpm
diff --git a/meta/classes/oelint.bbclass b/meta/classes/oelint.bbclass
index a4ee7d6e33..458a25ecc3 100644
--- a/meta/classes/oelint.bbclass
+++ b/meta/classes/oelint.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
addtask lint before do_build
do_lint[nostamp] = "1"
diff --git a/meta/classes/overlayfs-etc.bbclass b/meta/classes/overlayfs-etc.bbclass
index 5c1e8f9beb..d0bc3ecfac 100644
--- a/meta/classes/overlayfs-etc.bbclass
+++ b/meta/classes/overlayfs-etc.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Class for setting up /etc in overlayfs
#
diff --git a/meta/classes/overlayfs.bbclass b/meta/classes/overlayfs.bbclass
index ccc88bb4ac..bdc6dd9d57 100644
--- a/meta/classes/overlayfs.bbclass
+++ b/meta/classes/overlayfs.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Class for generation of overlayfs mount units
#
diff --git a/meta/classes/own-mirrors.bbclass b/meta/classes/own-mirrors.bbclass
index 699eb3628b..2f24ff1830 100644
--- a/meta/classes/own-mirrors.bbclass
+++ b/meta/classes/own-mirrors.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
PREMIRRORS:prepend = " \
cvs://.*/.* ${SOURCE_MIRROR_URL} \
diff --git a/meta/classes/package.bbclass b/meta/classes/package.bbclass
index a4b6263884..418400da8c 100644
--- a/meta/classes/package.bbclass
+++ b/meta/classes/package.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# Packaging process
diff --git a/meta/classes/package_deb.bbclass b/meta/classes/package_deb.bbclass
index a9b8ba0118..ec7e10dbc9 100644
--- a/meta/classes/package_deb.bbclass
+++ b/meta/classes/package_deb.bbclass
@@ -1,6 +1,8 @@
#
# Copyright 2006-2008 OpenedHand Ltd.
#
+# SPDX-License-Identifier: MIT
+#
inherit package
diff --git a/meta/classes/package_ipk.bbclass b/meta/classes/package_ipk.bbclass
index 552361e8fd..c43592af7e 100644
--- a/meta/classes/package_ipk.bbclass
+++ b/meta/classes/package_ipk.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit package
diff --git a/meta/classes/package_pkgdata.bbclass b/meta/classes/package_pkgdata.bbclass
index e495eaf6bd..f653bd9240 100644
--- a/meta/classes/package_pkgdata.bbclass
+++ b/meta/classes/package_pkgdata.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
WORKDIR_PKGDATA = "${WORKDIR}/pkgdata-sysroot"
diff --git a/meta/classes/package_rpm.bbclass b/meta/classes/package_rpm.bbclass
index a24ffb719a..63c1b077a3 100644
--- a/meta/classes/package_rpm.bbclass
+++ b/meta/classes/package_rpm.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit package
diff --git a/meta/classes/package_tar.bbclass b/meta/classes/package_tar.bbclass
index 0c5c3e58e8..de995f9747 100644
--- a/meta/classes/package_tar.bbclass
+++ b/meta/classes/package_tar.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit package
diff --git a/meta/classes/packagedata.bbclass b/meta/classes/packagedata.bbclass
index 89a015b879..9f72c01d77 100644
--- a/meta/classes/packagedata.bbclass
+++ b/meta/classes/packagedata.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
python read_subpackage_metadata () {
import oe.packagedata
diff --git a/meta/classes/packagegroup.bbclass b/meta/classes/packagegroup.bbclass
index 54917942a4..6f17fc73b0 100644
--- a/meta/classes/packagegroup.bbclass
+++ b/meta/classes/packagegroup.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Class for packagegroup (package group) recipes
diff --git a/meta/classes/patch.bbclass b/meta/classes/patch.bbclass
index 8de7025491..e3157c7b18 100644
--- a/meta/classes/patch.bbclass
+++ b/meta/classes/patch.bbclass
@@ -1,4 +1,6 @@
# Copyright (C) 2006 OpenedHand LTD
+#
+# SPDX-License-Identifier: MIT
# Point to an empty file so any user's custom settings don't break things
QUILTRCFILE ?= "${STAGING_ETCDIR_NATIVE}/quiltrc"
diff --git a/meta/classes/perl-version.bbclass b/meta/classes/perl-version.bbclass
index c314b4b575..269ac9eb31 100644
--- a/meta/classes/perl-version.bbclass
+++ b/meta/classes/perl-version.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
PERL_OWN_DIR = ""
diff --git a/meta/classes/perlnative.bbclass b/meta/classes/perlnative.bbclass
index 4d6ddd83cb..d56ec4ae72 100644
--- a/meta/classes/perlnative.bbclass
+++ b/meta/classes/perlnative.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
EXTRANATIVEPATH += "perl-native"
DEPENDS += "perl-native"
diff --git a/meta/classes/pixbufcache.bbclass b/meta/classes/pixbufcache.bbclass
index b451f5a7dd..107e38885e 100644
--- a/meta/classes/pixbufcache.bbclass
+++ b/meta/classes/pixbufcache.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# This class will generate the proper postinst/postrm scriptlets for pixbuf
diff --git a/meta/classes/pkgconfig.bbclass b/meta/classes/pkgconfig.bbclass
index db57ce4472..1e1f3824dd 100644
--- a/meta/classes/pkgconfig.bbclass
+++ b/meta/classes/pkgconfig.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
DEPENDS:prepend = "pkgconfig-native "
diff --git a/meta/classes/populate_sdk.bbclass b/meta/classes/populate_sdk.bbclass
index 3e3a290ef2..caeef5d2b2 100644
--- a/meta/classes/populate_sdk.bbclass
+++ b/meta/classes/populate_sdk.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# The majority of populate_sdk is located in populate_sdk_base
# This chunk simply facilitates compatibility with SDK only recipes.
diff --git a/meta/classes/populate_sdk_base.bbclass b/meta/classes/populate_sdk_base.bbclass
index df8ef8ef12..0be108ad98 100644
--- a/meta/classes/populate_sdk_base.bbclass
+++ b/meta/classes/populate_sdk_base.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
PACKAGES = ""
diff --git a/meta/classes/populate_sdk_ext.bbclass b/meta/classes/populate_sdk_ext.bbclass
index a28588a384..56e24c4eed 100644
--- a/meta/classes/populate_sdk_ext.bbclass
+++ b/meta/classes/populate_sdk_ext.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Extensible SDK
diff --git a/meta/classes/prexport.bbclass b/meta/classes/prexport.bbclass
index ddd0ce68db..e5098e3308 100644
--- a/meta/classes/prexport.bbclass
+++ b/meta/classes/prexport.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
PRSERV_DUMPOPT_VERSION = "${PRAUTOINX}"
PRSERV_DUMPOPT_PKGARCH = ""
diff --git a/meta/classes/primport.bbclass b/meta/classes/primport.bbclass
index 4d577bf830..00924174c1 100644
--- a/meta/classes/primport.bbclass
+++ b/meta/classes/primport.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
python primport_handler () {
import bb.event
diff --git a/meta/classes/ptest-gnome.bbclass b/meta/classes/ptest-gnome.bbclass
index d68df978d7..d4ad22d85d 100644
--- a/meta/classes/ptest-gnome.bbclass
+++ b/meta/classes/ptest-gnome.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit ptest
diff --git a/meta/classes/ptest-perl.bbclass b/meta/classes/ptest-perl.bbclass
index fba13934c9..c283fdd1fc 100644
--- a/meta/classes/ptest-perl.bbclass
+++ b/meta/classes/ptest-perl.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit ptest
diff --git a/meta/classes/ptest.bbclass b/meta/classes/ptest.bbclass
index bdb50ff39a..0383206a6d 100644
--- a/meta/classes/ptest.bbclass
+++ b/meta/classes/ptest.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
SUMMARY:${PN}-ptest ?= "${SUMMARY} - Package test files"
DESCRIPTION:${PN}-ptest ?= "${DESCRIPTION} \
diff --git a/meta/classes/pypi.bbclass b/meta/classes/pypi.bbclass
index b59f0d33ac..aab04c638f 100644
--- a/meta/classes/pypi.bbclass
+++ b/meta/classes/pypi.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
def pypi_package(d):
bpn = d.getVar('BPN')
diff --git a/meta/classes/python3-dir.bbclass b/meta/classes/python3-dir.bbclass
index f98380d331..912c67253c 100644
--- a/meta/classes/python3-dir.bbclass
+++ b/meta/classes/python3-dir.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
PYTHON_BASEVERSION = "3.10"
PYTHON_ABI = ""
diff --git a/meta/classes/python3native.bbclass b/meta/classes/python3native.bbclass
index ec7402d904..654a002fdb 100644
--- a/meta/classes/python3native.bbclass
+++ b/meta/classes/python3native.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit python3-dir
diff --git a/meta/classes/python3targetconfig.bbclass b/meta/classes/python3targetconfig.bbclass
index ad3629180d..3f89e5e09e 100644
--- a/meta/classes/python3targetconfig.bbclass
+++ b/meta/classes/python3targetconfig.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit python3native
diff --git a/meta/classes/python_flit_core.bbclass b/meta/classes/python_flit_core.bbclass
index 0f5301084f..a0b1feb70a 100644
--- a/meta/classes/python_flit_core.bbclass
+++ b/meta/classes/python_flit_core.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit python_pep517 python3native python3-dir setuptools3-base
diff --git a/meta/classes/python_hatchling.bbclass b/meta/classes/python_hatchling.bbclass
index 502ec877c1..b9e6582eb5 100644
--- a/meta/classes/python_hatchling.bbclass
+++ b/meta/classes/python_hatchling.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit python_pep517 python3native python3-dir setuptools3-base
diff --git a/meta/classes/python_pep517.bbclass b/meta/classes/python_pep517.bbclass
index c001b7d157..202dde0bc3 100644
--- a/meta/classes/python_pep517.bbclass
+++ b/meta/classes/python_pep517.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Common infrastructure for Python packages that use PEP-517 compliant packaging.
# https://www.python.org/dev/peps/pep-0517/
diff --git a/meta/classes/python_poetry_core.bbclass b/meta/classes/python_poetry_core.bbclass
index 5de90a7be3..c7dc5d0382 100644
--- a/meta/classes/python_poetry_core.bbclass
+++ b/meta/classes/python_poetry_core.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit python_pep517 python3native setuptools3-base
diff --git a/meta/classes/python_pyo3.bbclass b/meta/classes/python_pyo3.bbclass
index 3b938667b5..9a32eac6fd 100644
--- a/meta/classes/python_pyo3.bbclass
+++ b/meta/classes/python_pyo3.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# This class helps make sure that Python extensions built with PyO3
diff --git a/meta/classes/python_setuptools3_rust.bbclass b/meta/classes/python_setuptools3_rust.bbclass
index 0a4eaddc11..d6ce2edb96 100644
--- a/meta/classes/python_setuptools3_rust.bbclass
+++ b/meta/classes/python_setuptools3_rust.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit python_pyo3 setuptools3
diff --git a/meta/classes/python_setuptools_build_meta.bbclass b/meta/classes/python_setuptools_build_meta.bbclass
index 346b13337e..4c84d1e8d0 100644
--- a/meta/classes/python_setuptools_build_meta.bbclass
+++ b/meta/classes/python_setuptools_build_meta.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit setuptools3-base python_pep517
diff --git a/meta/classes/qemu.bbclass b/meta/classes/qemu.bbclass
index 924457a497..874b15127c 100644
--- a/meta/classes/qemu.bbclass
+++ b/meta/classes/qemu.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# This class contains functions for recipes that need QEMU or test for its
diff --git a/meta/classes/qemuboot.bbclass b/meta/classes/qemuboot.bbclass
index 54cfcd25f2..018c000ca2 100644
--- a/meta/classes/qemuboot.bbclass
+++ b/meta/classes/qemuboot.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Help runqemu boot target board, "QB" means Qemu Boot, the following
# vars can be set in conf files, such as <bsp.conf> to make it can be
diff --git a/meta/classes/recipe_sanity.bbclass b/meta/classes/recipe_sanity.bbclass
index c09a551a4f..1c2e24c6a1 100644
--- a/meta/classes/recipe_sanity.bbclass
+++ b/meta/classes/recipe_sanity.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
def __note(msg, d):
bb.note("%s: recipe_sanity: %s" % (d.getVar("P"), msg))
diff --git a/meta/classes/relative_symlinks.bbclass b/meta/classes/relative_symlinks.bbclass
index 15674db495..9ee20e0d09 100644
--- a/meta/classes/relative_symlinks.bbclass
+++ b/meta/classes/relative_symlinks.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
do_install[postfuncs] += "install_relative_symlinks"
diff --git a/meta/classes/relocatable.bbclass b/meta/classes/relocatable.bbclass
index 7b691fe654..d0a623fb0a 100644
--- a/meta/classes/relocatable.bbclass
+++ b/meta/classes/relocatable.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit chrpath
diff --git a/meta/classes/remove-libtool.bbclass b/meta/classes/remove-libtool.bbclass
index ef79151aa9..8e987388c8 100644
--- a/meta/classes/remove-libtool.bbclass
+++ b/meta/classes/remove-libtool.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# This class removes libtool .la files after do_install
diff --git a/meta/classes/report-error.bbclass b/meta/classes/report-error.bbclass
index 6866d47370..2f692fbbcc 100644
--- a/meta/classes/report-error.bbclass
+++ b/meta/classes/report-error.bbclass
@@ -4,7 +4,8 @@
# Copyright (C) 2013 Intel Corporation
# Author: Andreea Brandusa Proca <andreea.b.proca@intel.com>
#
-# Licensed under the MIT license, see COPYING.MIT for details
+# SPDX-License-Identifier: MIT
+#
ERR_REPORT_DIR ?= "${LOG_DIR}/error-report"
diff --git a/meta/classes/rm_work.bbclass b/meta/classes/rm_work.bbclass
index 445d80c82a..c493efff2f 100644
--- a/meta/classes/rm_work.bbclass
+++ b/meta/classes/rm_work.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# Removes source after build
diff --git a/meta/classes/rm_work_and_downloads.bbclass b/meta/classes/rm_work_and_downloads.bbclass
index 15e6091b9d..2695a3807f 100644
--- a/meta/classes/rm_work_and_downloads.bbclass
+++ b/meta/classes/rm_work_and_downloads.bbclass
@@ -1,8 +1,7 @@
# Author: Patrick Ohly <patrick.ohly@intel.com>
# Copyright: Copyright (C) 2015 Intel Corporation
#
-# This file is licensed under the MIT license, see COPYING.MIT in
-# this source distribution for the terms.
+# SPDX-License-Identifier: MIT
# This class is used like rm_work:
# INHERIT += "rm_work_and_downloads"
diff --git a/meta/classes/rootfs-postcommands.bbclass b/meta/classes/rootfs-postcommands.bbclass
index cce804c8a0..d40adf5f0e 100644
--- a/meta/classes/rootfs-postcommands.bbclass
+++ b/meta/classes/rootfs-postcommands.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Zap the root password if debug-tweaks and empty-root-password features are not enabled
ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains_any("IMAGE_FEATURES", [ 'debug-tweaks', 'empty-root-password' ], "", "zap_empty_root_password; ",d)}'
diff --git a/meta/classes/rootfs_deb.bbclass b/meta/classes/rootfs_deb.bbclass
index 0469ba7059..c5c6426abb 100644
--- a/meta/classes/rootfs_deb.bbclass
+++ b/meta/classes/rootfs_deb.bbclass
@@ -1,6 +1,8 @@
#
# Copyright 2006-2007 Openedhand Ltd.
#
+# SPDX-License-Identifier: MIT
+#
ROOTFS_PKGMANAGE = "dpkg apt"
diff --git a/meta/classes/rootfs_ipk.bbclass b/meta/classes/rootfs_ipk.bbclass
index 48732e9784..a48ad07dfc 100644
--- a/meta/classes/rootfs_ipk.bbclass
+++ b/meta/classes/rootfs_ipk.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# Creates a root filesystem out of IPKs
diff --git a/meta/classes/rootfs_rpm.bbclass b/meta/classes/rootfs_rpm.bbclass
index 629e1d41a9..6eccd5a959 100644
--- a/meta/classes/rootfs_rpm.bbclass
+++ b/meta/classes/rootfs_rpm.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# Creates a root filesystem out of rpm packages
diff --git a/meta/classes/rootfsdebugfiles.bbclass b/meta/classes/rootfsdebugfiles.bbclass
index 98cea38de0..cbcf876479 100644
--- a/meta/classes/rootfsdebugfiles.bbclass
+++ b/meta/classes/rootfsdebugfiles.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# This class installs additional files found on the build host
# directly into the rootfs.
diff --git a/meta/classes/rust-bin.bbclass b/meta/classes/rust-bin.bbclass
index 369c574ed0..b8e7ef8191 100644
--- a/meta/classes/rust-bin.bbclass
+++ b/meta/classes/rust-bin.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit rust
diff --git a/meta/classes/rust-common.bbclass b/meta/classes/rust-common.bbclass
index 344e658615..93bf6c8be6 100644
--- a/meta/classes/rust-common.bbclass
+++ b/meta/classes/rust-common.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit python3native
inherit rust-target-config
diff --git a/meta/classes/rust-target-config.bbclass b/meta/classes/rust-target-config.bbclass
index b77984dcbc..3405086402 100644
--- a/meta/classes/rust-target-config.bbclass
+++ b/meta/classes/rust-target-config.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Right now this is focused on arm-specific tune features.
# We get away with this for now as one can only use x86-64 as the build host
diff --git a/meta/classes/rust.bbclass b/meta/classes/rust.bbclass
index b91de85db2..dae25cac2a 100644
--- a/meta/classes/rust.bbclass
+++ b/meta/classes/rust.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit rust-common
diff --git a/meta/classes/sanity.bbclass b/meta/classes/sanity.bbclass
index f1ebdf5684..4104694478 100644
--- a/meta/classes/sanity.bbclass
+++ b/meta/classes/sanity.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# Sanity check the users setup for common misconfigurations
diff --git a/meta/classes/scons.bbclass b/meta/classes/scons.bbclass
index ead5ec4ce1..5f0d4a910b 100644
--- a/meta/classes/scons.bbclass
+++ b/meta/classes/scons.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit python3native
diff --git a/meta/classes/setuptools3-base.bbclass b/meta/classes/setuptools3-base.bbclass
index 5d90ec1b19..21b688ced0 100644
--- a/meta/classes/setuptools3-base.bbclass
+++ b/meta/classes/setuptools3-base.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
DEPENDS:append:class-target = " ${PYTHON_PN}-native ${PYTHON_PN}"
DEPENDS:append:class-nativesdk = " ${PYTHON_PN}-native ${PYTHON_PN}"
diff --git a/meta/classes/setuptools3.bbclass b/meta/classes/setuptools3.bbclass
index c08178fcf5..4c6e79ee9a 100644
--- a/meta/classes/setuptools3.bbclass
+++ b/meta/classes/setuptools3.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit setuptools3-base python_pep517
diff --git a/meta/classes/setuptools3_legacy.bbclass b/meta/classes/setuptools3_legacy.bbclass
index 0d9345d847..21748f922a 100644
--- a/meta/classes/setuptools3_legacy.bbclass
+++ b/meta/classes/setuptools3_legacy.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# This class is for packages which use the deprecated setuptools behaviour,
# specifically custom install tasks which don't work correctly with bdist_wheel.
diff --git a/meta/classes/sign_ipk.bbclass b/meta/classes/sign_ipk.bbclass
index 940d29f451..51c24b38b2 100644
--- a/meta/classes/sign_ipk.bbclass
+++ b/meta/classes/sign_ipk.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Class for generating signed IPK packages.
#
diff --git a/meta/classes/sign_package_feed.bbclass b/meta/classes/sign_package_feed.bbclass
index d29985d532..e9d664750c 100644
--- a/meta/classes/sign_package_feed.bbclass
+++ b/meta/classes/sign_package_feed.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Class for signing package feeds
#
diff --git a/meta/classes/sign_rpm.bbclass b/meta/classes/sign_rpm.bbclass
index 159d525261..ee0c4808fa 100644
--- a/meta/classes/sign_rpm.bbclass
+++ b/meta/classes/sign_rpm.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Class for generating signed RPM packages.
#
diff --git a/meta/classes/siteconfig.bbclass b/meta/classes/siteconfig.bbclass
index 96491cf828..953cafd285 100644
--- a/meta/classes/siteconfig.bbclass
+++ b/meta/classes/siteconfig.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
python siteconfig_do_siteconfig () {
shared_state = sstate_state_fromvars(d)
diff --git a/meta/classes/siteinfo.bbclass b/meta/classes/siteinfo.bbclass
index 2f20ad781f..d31c9b2571 100644
--- a/meta/classes/siteinfo.bbclass
+++ b/meta/classes/siteinfo.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# This class exists to provide information about the targets that
# may be needed by other classes and/or recipes. If you add a new
diff --git a/meta/classes/sstate.bbclass b/meta/classes/sstate.bbclass
index 5009ce825c..cd77c58dbf 100644
--- a/meta/classes/sstate.bbclass
+++ b/meta/classes/sstate.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
SSTATE_VERSION = "10"
diff --git a/meta/classes/staging.bbclass b/meta/classes/staging.bbclass
index 55df9d1c91..5a1f43de78 100644
--- a/meta/classes/staging.bbclass
+++ b/meta/classes/staging.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# These directories will be staged in the sysroot
SYSROOT_DIRS = " \
diff --git a/meta/classes/syslinux.bbclass b/meta/classes/syslinux.bbclass
index 894f6b3718..be3b898b4d 100644
--- a/meta/classes/syslinux.bbclass
+++ b/meta/classes/syslinux.bbclass
@@ -1,6 +1,6 @@
# syslinux.bbclass
-# Copyright (C) 2004-2006, Advanced Micro Devices, Inc. All Rights Reserved
-# Released under the MIT license (see packages/COPYING)
+# Copyright (C) 2004-2006, Advanced Micro Devices, Inc.
+# SPDX-License-Identifier: MIT
# Provide syslinux specific functions for building bootable images.
diff --git a/meta/classes/systemd-boot-cfg.bbclass b/meta/classes/systemd-boot-cfg.bbclass
index 64fe81d6d0..366dd23738 100644
--- a/meta/classes/systemd-boot-cfg.bbclass
+++ b/meta/classes/systemd-boot-cfg.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
SYSTEMD_BOOT_CFG ?= "${S}/loader.conf"
SYSTEMD_BOOT_ENTRIES ?= ""
diff --git a/meta/classes/systemd-boot.bbclass b/meta/classes/systemd-boot.bbclass
index 57ec0acbc5..5aa32dd997 100644
--- a/meta/classes/systemd-boot.bbclass
+++ b/meta/classes/systemd-boot.bbclass
@@ -1,6 +1,6 @@
# Copyright (C) 2016 Intel Corporation
#
-# Released under the MIT license (see COPYING.MIT)
+# SPDX-License-Identifier: MIT
# systemd-boot.bbclass - The "systemd-boot" is essentially the gummiboot merged into systemd.
# The original standalone gummiboot project is dead without any more
diff --git a/meta/classes/systemd.bbclass b/meta/classes/systemd.bbclass
index c24ed90664..f6564c2b31 100644
--- a/meta/classes/systemd.bbclass
+++ b/meta/classes/systemd.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# The list of packages that should have systemd packaging scripts added. For
# each entry, optionally have a SYSTEMD_SERVICE:[package] that lists the service
diff --git a/meta/classes/terminal.bbclass b/meta/classes/terminal.bbclass
index 5ca9104641..2dfc7db255 100644
--- a/meta/classes/terminal.bbclass
+++ b/meta/classes/terminal.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
OE_TERMINAL ?= 'auto'
OE_TERMINAL[type] = 'choice'
diff --git a/meta/classes/testexport.bbclass b/meta/classes/testexport.bbclass
index 98468c96fd..f7c5242dc5 100644
--- a/meta/classes/testexport.bbclass
+++ b/meta/classes/testexport.bbclass
@@ -1,7 +1,6 @@
# Copyright (C) 2016 Intel Corporation
#
-# Released under the MIT license (see COPYING.MIT)
-#
+# SPDX-License-Identifier: MIT
#
# testexport.bbclass allows to execute runtime test outside OE environment.
# Most of the tests are commands run on target image over ssh.
diff --git a/meta/classes/testimage.bbclass b/meta/classes/testimage.bbclass
index 7898223bce..8d2fab21df 100644
--- a/meta/classes/testimage.bbclass
+++ b/meta/classes/testimage.bbclass
@@ -1,6 +1,6 @@
# Copyright (C) 2013 Intel Corporation
#
-# Released under the MIT license (see COPYING.MIT)
+# SPDX-License-Identifier: MIT
inherit metadata_scm
inherit image-artifact-names
diff --git a/meta/classes/testsdk.bbclass b/meta/classes/testsdk.bbclass
index 8b2e74f606..fd82e6ef41 100644
--- a/meta/classes/testsdk.bbclass
+++ b/meta/classes/testsdk.bbclass
@@ -1,6 +1,6 @@
# Copyright (C) 2013 - 2016 Intel Corporation
#
-# Released under the MIT license (see COPYING.MIT)
+# SPDX-License-Identifier: MIT
# testsdk.bbclass enables testing for SDK and Extensible SDK
#
diff --git a/meta/classes/texinfo.bbclass b/meta/classes/texinfo.bbclass
index d7afbc7d6a..380247faf5 100644
--- a/meta/classes/texinfo.bbclass
+++ b/meta/classes/texinfo.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# This class is inherited by recipes whose upstream packages invoke the
# texinfo utilities at build-time. Native and cross recipes are made to use the
diff --git a/meta/classes/toaster.bbclass b/meta/classes/toaster.bbclass
index f365c09142..03c4f3a930 100644
--- a/meta/classes/toaster.bbclass
+++ b/meta/classes/toaster.bbclass
@@ -3,7 +3,7 @@
#
# Copyright (C) 2013 Intel Corporation
#
-# Released under the MIT license (see COPYING.MIT)
+# SPDX-License-Identifier: MIT
#
# This bbclass is designed to extract data used by OE-Core during the build process,
# for recording in the Toaster system.
diff --git a/meta/classes/toolchain-scripts-base.bbclass b/meta/classes/toolchain-scripts-base.bbclass
index e0719e584b..d24a986e02 100644
--- a/meta/classes/toolchain-scripts-base.bbclass
+++ b/meta/classes/toolchain-scripts-base.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#This function create a version information file
toolchain_create_sdk_version () {
diff --git a/meta/classes/toolchain-scripts.bbclass b/meta/classes/toolchain-scripts.bbclass
index eec7780530..3cc823fe63 100644
--- a/meta/classes/toolchain-scripts.bbclass
+++ b/meta/classes/toolchain-scripts.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit toolchain-scripts-base siteinfo kernel-arch
diff --git a/meta/classes/typecheck.bbclass b/meta/classes/typecheck.bbclass
index 86fcf28942..160f7a024b 100644
--- a/meta/classes/typecheck.bbclass
+++ b/meta/classes/typecheck.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Check types of bitbake configuration variables
#
diff --git a/meta/classes/uboot-config.bbclass b/meta/classes/uboot-config.bbclass
index e8da8c7452..9889d026fa 100644
--- a/meta/classes/uboot-config.bbclass
+++ b/meta/classes/uboot-config.bbclass
@@ -10,6 +10,9 @@
# UBOOT_MACHINE = "config"
#
# Copyright 2013, 2014 (C) O.S. Systems Software LTDA.
+#
+# SPDX-License-Identifier: MIT
+
def removesuffix(s, suffix):
if suffix and s.endswith(suffix):
diff --git a/meta/classes/uboot-extlinux-config.bbclass b/meta/classes/uboot-extlinux-config.bbclass
index dcebe7ff31..86a7d30ca0 100644
--- a/meta/classes/uboot-extlinux-config.bbclass
+++ b/meta/classes/uboot-extlinux-config.bbclass
@@ -54,7 +54,7 @@
# APPEND root=/dev/mmcblk2p2 rootwait rw console=${console}
#
# Copyright (C) 2016, O.S. Systems Software LTDA. All Rights Reserved
-# Released under the MIT license (see packages/COPYING)
+# SPDX-License-Identifier: MIT
#
# The kernel has an internal default console, which you can override with
# a console=...some_tty...
diff --git a/meta/classes/uboot-sign.bbclass b/meta/classes/uboot-sign.bbclass
index 970f20407b..debbf23ec6 100644
--- a/meta/classes/uboot-sign.bbclass
+++ b/meta/classes/uboot-sign.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# This file is part of U-Boot verified boot support and is intended to be
# inherited from u-boot recipe and from kernel-fitimage.bbclass.
diff --git a/meta/classes/uninative.bbclass b/meta/classes/uninative.bbclass
index 76999eb653..4b7fb36449 100644
--- a/meta/classes/uninative.bbclass
+++ b/meta/classes/uninative.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
UNINATIVE_LOADER ?= "${UNINATIVE_STAGING_DIR}-uninative/${BUILD_ARCH}-linux/lib/${@bb.utils.contains('BUILD_ARCH', 'x86_64', 'ld-linux-x86-64.so.2', '', d)}${@bb.utils.contains('BUILD_ARCH', 'i686', 'ld-linux.so.2', '', d)}${@bb.utils.contains('BUILD_ARCH', 'aarch64', 'ld-linux-aarch64.so.1', '', d)}${@bb.utils.contains('BUILD_ARCH', 'ppc64le', 'ld64.so.2', '', d)}"
UNINATIVE_STAGING_DIR ?= "${STAGING_DIR}"
diff --git a/meta/classes/update-alternatives.bbclass b/meta/classes/update-alternatives.bbclass
index 0946589868..970d9bcd45 100644
--- a/meta/classes/update-alternatives.bbclass
+++ b/meta/classes/update-alternatives.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# This class is used to help the alternatives system which is useful when
# multiple sources provide same command. You can use update-alternatives
diff --git a/meta/classes/update-rc.d.bbclass b/meta/classes/update-rc.d.bbclass
index b92ff5a4fa..cb2aaba57c 100644
--- a/meta/classes/update-rc.d.bbclass
+++ b/meta/classes/update-rc.d.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
UPDATERCPN ?= "${PN}"
diff --git a/meta/classes/upstream-version-is-even.bbclass b/meta/classes/upstream-version-is-even.bbclass
index b89a13414d..19587cb12c 100644
--- a/meta/classes/upstream-version-is-even.bbclass
+++ b/meta/classes/upstream-version-is-even.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# This class ensures that the upstream version check only
# accepts even minor versions (i.e. 3.0.x, 3.2.x, 3.4.x, etc.)
diff --git a/meta/classes/useradd-staticids.bbclass b/meta/classes/useradd-staticids.bbclass
index c994b5979e..abe484eb46 100644
--- a/meta/classes/useradd-staticids.bbclass
+++ b/meta/classes/useradd-staticids.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# In order to support a deterministic set of 'dynamic' users/groups,
# we need a function to reformat the params based on a static file
diff --git a/meta/classes/useradd.bbclass b/meta/classes/useradd.bbclass
index 2aff3eda42..4d3bd9a5f5 100644
--- a/meta/classes/useradd.bbclass
+++ b/meta/classes/useradd.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
inherit useradd_base
diff --git a/meta/classes/useradd_base.bbclass b/meta/classes/useradd_base.bbclass
index ee8cc6c843..863cb7b76c 100644
--- a/meta/classes/useradd_base.bbclass
+++ b/meta/classes/useradd_base.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# This bbclass provides basic functionality for user/group settings.
# This bbclass is intended to be inherited by useradd.bbclass and
diff --git a/meta/classes/utility-tasks.bbclass b/meta/classes/utility-tasks.bbclass
index 1275a45861..ae2da330b8 100644
--- a/meta/classes/utility-tasks.bbclass
+++ b/meta/classes/utility-tasks.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
addtask listtasks
do_listtasks[nostamp] = "1"
diff --git a/meta/classes/utils.bbclass b/meta/classes/utils.bbclass
index 27f6f8d324..8d797ff126 100644
--- a/meta/classes/utils.bbclass
+++ b/meta/classes/utils.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
oe_soinstall() {
# Purpose: Install shared library file and
diff --git a/meta/classes/vala.bbclass b/meta/classes/vala.bbclass
index 65e15013e1..460ddb36f0 100644
--- a/meta/classes/vala.bbclass
+++ b/meta/classes/vala.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# Everyone needs vala-native and targets need vala, too,
# because that is where target builds look for .vapi files.
diff --git a/meta/classes/waf.bbclass b/meta/classes/waf.bbclass
index ef24c61dd8..5fa0cc4987 100644
--- a/meta/classes/waf.bbclass
+++ b/meta/classes/waf.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
# avoids build breaks when using no-static-libs.inc
DISABLE_STATIC = ""
diff --git a/meta/classes/xmlcatalog.bbclass b/meta/classes/xmlcatalog.bbclass
index 14a1094d0f..5826d0a8b5 100644
--- a/meta/classes/xmlcatalog.bbclass
+++ b/meta/classes/xmlcatalog.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
DEPENDS = "libxml2-native"
diff --git a/meta/classes/yocto-check-layer.bbclass b/meta/classes/yocto-check-layer.bbclass
index 2d21676ec2..404f5fd9f2 100644
--- a/meta/classes/yocto-check-layer.bbclass
+++ b/meta/classes/yocto-check-layer.bbclass
@@ -1,6 +1,8 @@
#
# Copyright OpenEmbedded Contributors
#
+# SPDX-License-Identifier: MIT
+#
#
# This class is used by yocto-check-layer script for additional per-recipe tests