4月にリリースされたYocto3.1LTS(Dunfell)の5回目のポイントリリース、3.1.5 公開のアナウンスが
2021年1月20日付けでありました。
当初は1月11日版で構築、1月22日リリース予定でしたが、1月13日付のコミットを元にQAテストを実施
したものがリリースとなっています。

本リリースよりドキュメントのフォーマットが従来のdocbook形式から、Sphix形式に変更となっています。

現時点では、以降の変更点はコミットされていません。

次のポイントリリース3.1.6は 、2021/3/05 を予定しています。

本リリースの詳細は以下のURLでご確認ください。
https://lists.yoctoproject.org/g/yocto-announce/message/205

----------------
Security Fixes
----------------
glib-2.0: add patch for CVE-2020-35457
patch: fix CVE-2019-20633
grub: fix "CVE:" line in one of the patches
gdk-pixbuf: fix CVE-2020-29385
libexif: fix CVE-2020-0198; CVE-2020-0452
cups: Mark CVE-2008-1033 as a non-issue
cups: Mark CVE-2009-0032 as a non-issue
cups: whitelist CVE-2018-6553
binutils: fix CVE-2020-16592/16598
qemu: fix CVE-2020-25723
glibc: fix CVE-2020-29562
python3: fix CVE-2019-20907
coreutils: add SUSE-specific issues to CVE whitelist
gstreamer1.0-plugins-base: set CVE_PRODUCT
gstreamer1.0-rtsp-server: set CVE_PRODUCT
sqlite3: add CVE-2015-3717 to whitelist
python3: add CVE-2007-4559 to whitelist

----------------
Fixes
----------------
poky.conf: Bump version for 3.1.5 release
documentation: prepare for 3.1.5 release
mobile-broadband-provider-info: upgrade 20190618 ->20201225
selftest: Add argument to keep build dir
ruby: remove tcl DEPENDS
gcc: Fix mangled patch
systemd: update from 244.3 to 244.5 stable release
glibc: update to 2.31 stable tree head
diffstat: point the license checksum at the license
oe-pkgdata-util: Added a test to verify oe-pkgdata-util without parameters
timezone: upgrade to 2020f
linux-yocto/5.4: update to v5.4.85
wic: fix typo
man-db: Fix reproducibility issue
wic/direct/kparser: ensure fsuuid for vfat and msdos align with format
timezone: upgrade to 2020e
grub: Further reproducibility fix
populate_sdk_base: Fix condition syntax if SDK_RELOCATE_AFTER_INSTALL is disabled
apr-util: Only specify --with-dbm=gdbm if gdbm support is enabled
weston: Fix PACKAGECONFIG for remoting
oeqa/commands: Ensure sync can be found regardless of PATH
initscripts: use quotes for shell variable comparision
lib/oe/qa: handle the 'no specific instruction set' ELF e_machine value
pulseaudio: Remove OE_LT_RPATH_ALLOW
meta: add missing descriptions in some support recipes
valgrind: exclude bar_bad/bar_bad_xml from ptests
coreutils: enable xattrs by default for nativesdk
wic-image-minimal: only depend on syslinux on x86 targets
uboot-extlinux-config: exclude OVERRIDES from do_create_extlinux_config vardeps
grub-efi-cfg: exclude OVERRIDES from build_efi_cfg vardeps
mesa: add more details to elf-tls patch
perl: fix installation failure because of shell issue
archiver.bbclass: Fix --runall=deploy_archives for images
ncurses: Prevent LDFLAGS being emitted in .pc files
ncurses: remove config.cache
minicom: RDEPENDS on ncurses-terminfo-base
ncurses: Make ncurses-tools depend on ncurses-terminfo-base
buildtools-tarball.bb: Fix PATH for environment setup script
modutils-initscripts: Use depmod -a when modules.dep is empty
sphinx: update link to bitbake docs
conf.py: set version to 3.1.4
Makefile: enable parallel build
conf.py: Improve TOC and Outline depth in PDF output
poky.yaml: remove unused variables
documentation: Add Pipenv support
adt-manual: delete obsolete ADT manual, and related content
README: "yocto-project-qs" -> "brief-yoctoprojectqs"
ref-manual/ref-variables: "PACKAGE_FEEDS_ARCHS" -> "PACKAGE_FEED_ARCHS"
dev-manual: Add a note about prelink changing prebuild binaries
ref-manual: add IMAGE_LINK_NAME
ref-manual: add IMAGE_NAME_SUFFIX variable
ref-manual: add IMAGE_VERSION_SUFFIX variable
ref-manual/faq: Add entry for why binaries are changed in images
ref-manual: fix for features_check class change
ref-manual: add reference anchors for each QA check
docs: kernel-dev-faq: update outdated RDEPENDS_kernel-base
docs: kernel-dev-common: add .patch file extension to SRC_URI files
docs: kernel-dev: fix typos, highlights and links
sphinx: add 3.1.3 and 3.0.4 release in the switcher
ref-manual: Document wic --offset option
docs: bsp-guide: bsp: fix typos, highlights and links
docs: ref-manual: ref-terms: add links to terms in glossary
ref-variables: Given example for naming sources
docs: dev-manual: fix typos, highlights, indentation and links
docs: dev-manual-common-tasks: update python webserver example to python3
docs: dev-manual-common-tasks: remove paragraph about race when missing DEPENDS
sdk-manual: use built-in footnotes
docs: poky.yaml: fix identation in host packages variables
docs: sphinx: yocto-vars: rebuild files when poky.yaml has changed
docs: ref-manual: ref-system-requirements: update requirements to build Sphinx docs
docs: ref-manual: ref-classes: remove dropped tinderclient class
docs: ref-manual: migration-2.3: specify 2.3 version instead of DISTRO
docs: ref-manual: fix typos
docs: remove OE_INIT_FILE variable
docs: ref-manual: indentation, links and highlights fixes
docs: poky.yaml: use HTTPS for links
dev/test/ref-manual: Fix typos
docs: Fix license CC-BY-2.0-UK -> CC-BY-SA-2.0-UK
sphinx: rename Makefile.sphinx
sphinx: remove DocBook files
docs: ref-manual: ref-variables: add links to terms in glossary
docs: ref-manual: ref-variables: fix alphabetical order in glossary
docs: ref-manual: ref-variables: fix one-letter pointer links in glossary
sphinx: fix up some trademark and branding issues
sphinx: remove test-manual
sphinx: reintroduce changes for 3.1.1, 3.1.2, 3.1.3 and 3.1.4
sphinx: undo (ref-system-requirements: update supported hosts lists)
sphinx: import docs
bitbake: doc/conf.py: add missing import sys
bitbake: sphinx: partial undo (bitbake-user-manual: update perforce fetcher docs)
bitbake: sphinx: undo (bitbake-user-manual: Remove TERM from BB_HASHBASE_WHITELIST example)
bitbake: sphinx: import sphinx docs
openssl: Update to 1.1.1i
bash: Rename patch name
oeqa/selftest/cases/devtool.py: fix typo in ignore_patterns call
kernel: set COMPATIBLE_HOST to *-linux
linux-firmware: package firmware for Lontium lt9611uxc bridge
linux-firmware: upgrade 20201118 -> 20201218
linux-yocto/5.4/cfg: fix FIRMWARE_LOADER warnings
linux-yocto/5.4/cfg: fix -tiny warnings
linux-yocto/5.4: update to v5.4.83
linux-yocto/cfg: qemuarm64-gfx.cfg: add CONFIG_INPUT_UINPUT
linux-yocto/5.4: update to v5.4.82
linux-yocto/cfg: qemuppc: set CONFIG_SCSI to '=y'
linux-yocto/5.4: update to v5.4.80
linux-yocto-rt/5.4: update to -rt44
man-db: Avoid reproducibility failures after fixing groff-native
groff: Fix reproducibility issue
u-boot-tools: Fix reproducibility issue
grub: Add second fix for determinism issue
grub: Fix build reproducibility issue
metadata_scm: Fix signature handling of METADATA_REVISION and METADATA_BRANCH
buildtools-tarball: add wic dependency into extended buildtools
glib-networking/btrfs-tools/dosfstools/parted/bmap-tools/libsoup-2.4: add nativesdk support
llvm: sort the lists in generated source reproducibibly
serf: do not install the static library
ffmpeg: fix reproducibility
webkitgtk: fix reproducibility
ruby: fix reproducibility
llvm: fix reproducibility
meta/lib/oe/reproducible.py: gitsm:// works just as fine as git:// for timestamps
kernel-module-split.bbclass: fix kernel modules getting marked as CONFFILES
libffi: add patch to revert clang VFP workaround
cve-update-db-native: handle all-wildcard versions
meta/lib/oeqa/manual/oe-core.json: Update test_bitbake_devshell
linux-firmware: package ath11k firmware
linux-firmware: upgrade 20201022 -> 20201118
image_types: sort tarball file listings
devtool: remove unused variable
oeqa/devtool: use Yocto mirror for pv-1.5.3 tarball
lz4: Use the new branch naming from upstream
kernel-dummy: fix executing unexpected tasks
wireless-regdb: upgrade 2020.04.29 -> 2020.11.20
libsdl2: Add directfb to PACKAGECONFIG rdepends
go: update to 1.14.12
lttng-modules: add post 2.11.6 patches
linux-yocto/5.4: update to v5.4.78
linux-yocto/5.4: perf: Alias SYS_futex with SYS_futex_time64 on 32-bit arches with 64bit time_t
linux-yocto/5.4: update to v5.4.75
linux-yocto/5.4: config cleanup / warnings
linux-yocto/5.4: update to v5.4.73
linux-yocto/5.4: update to v5.4.72
linux-yocto/5.4: update to v5.4.71
e2fsprogs: Fix a ptest permissions determinism issue
fs-perms: Ensure /usr/src/debug/ file modes are correct
eudev: remove bashism to be compatible with dash
sysvinit: remove bashism to be compatible with dash
distutils-common-base: fix LINKSHARED expansion
cve-check: show real PN/PV
license_image.bbclass: use canonical name for license files
linux-firmware: rdepend on license for all nvidia packages
roofs_*.bbclass: fix missing vardeps for do_rootfs
kernel: Set proper LD in KERNEL_KCONFIG_COMMAND
kernel: relocate copy of module.lds to module compilation task
kernel: provide module.lds for out of tree builds in v5.10+
bitbake: taskexp: update for GTK API changes