Release Information

Each document in this chapter provides release notes and information about how to move to one release of the Yocto Project from the previous one.

• Introduction
  • General Migration Considerations
• Release 4.3 (nanbield)
  • Release 4.3 (nanbield)
    • Migration notes for 4.3 (nanbield)
      • Supported kernel versions
      • Layername override implications
      • Compiling changes
      • Supported distributions
      • edgerouter machine removed
      • Go language changes
      • systemd changes
      • Recipe changes
      • Deprecated variables
      • Removed variables
      • Removed recipes
      • Removed classes
      • Output file naming changes
      • Versioning changes
      • QEMU changes
      • Miscellaneous changes
  • Release notes for 4.3 (nanbield)
    • New Features / Enhancements in 4.3
    • Known Issues in 4.3
    • Recipe License changes in 4.3
    • Security Fixes in 4.3
    • Recipe Upgrades in 4.3
    • Contributors to 4.3
    • Repositories / Downloads for Yocto-4.3
  • Release notes for Yocto-4.3.1 (Nanbield)
    • Security Fixes in Yocto-4.3.1
    • Fixes in Yocto-4.3.1
    • Known Issues in Yocto-4.3.1
    • Contributors to Yocto-4.3.1
    • Repositories / Downloads for Yocto-4.3.1
  • Release notes for Yocto-4.3.2 (Nanbield)
    • Security Fixes in Yocto-4.3.2
    • Fixes in Yocto-4.3.2
    • Known Issues in Yocto-4.3.2
    • Contributors to Yocto-4.3.2
    • Repositories / Downloads for Yocto-4.3.2
  • Release notes for Yocto-4.3.3 (Nanbield)
    • Security Fixes in Yocto-4.3.3
    • Fixes in Yocto-4.3.3
    • Known Issues in Yocto-4.3.3
    • Contributors to Yocto-4.3.3
    • Repositories / Downloads for Yocto-4.3.3
  • Release notes for Yocto-4.3.4 (Nanbield)
    • Security Fixes in Yocto-4.3.4
    • Fixes in Yocto-4.3.4
    • Known Issues in Yocto-4.3.4
    • Contributors to Yocto-4.3.4
    • Repositories / Downloads for Yocto-4.3.4
• Release 4.2 (mickledore)
  • Release 4.2 (mickledore)
    • Migration notes for 4.2 (mickledore)
      • Supported distributions
      • Python 3.8 is now the minimum required Python version version
      • gcc 8.0 is now the minimum required GNU C compiler version
      • Fetching the NVD vulnerability database through the 2.0 API
      • Rust: mandatory checksums for crates
      • Python library code extensions
      • Removed variables
      • Removed recipes
      • Removed classes
      • LAYERSERIES_COMPAT for custom layers and devtool workspace
      • runqemu now limits slirp host port forwarding to localhost
      • Patch QA checks
      • Native/nativesdk mesa usage and graphics drivers
      • Miscellaneous changes
  • Release notes for 4.2 (mickledore)
    • New Features / Enhancements in 4.2
    • Known Issues in 4.2
    • Recipe License changes in 4.2
    • Security Fixes in 4.2
    • Recipe Upgrades in 4.2
    • Contributors to 4.2
    • Repositories / Downloads for Yocto-4.2
  • Release notes for Yocto-4.2.1 (Mickledore)
    • Security Fixes in Yocto-4.2.1
    • Fixes in Yocto-4.2.1
    • Known Issues in Yocto-4.2.1
    • Contributors to Yocto-4.2.1
    • Repositories / Downloads for Yocto-4.2.1
  • Release notes for Yocto-4.2.2 (Mickledore)
    • Security Fixes in Yocto-4.2.2
    • Fixes in Yocto-4.2.2
    • Known Issues in Yocto-4.2.2
    • Contributors to Yocto-4.2.2
    • Repositories / Downloads for Yocto-4.2.2
  • Release notes for Yocto-4.2.3 (Mickledore)
    • Security Fixes in Yocto-4.2.3
    • Fixes in Yocto-4.2.3
    • Known Issues in Yocto-4.2.3
    • Contributors to Yocto-4.2.3
    • Repositories / Downloads for Yocto-4.2.3
  • Release notes for Yocto-4.2.4 (Mickledore)
    • Security Fixes in Yocto-4.2.4
    • Fixes in Yocto-4.2.4
    • Known Issues in Yocto-4.2.4
    • Contributors to Yocto-4.2.4
    • Repositories / Downloads for Yocto-4.2.4
• Release 4.1 (langdale)
  • Release 4.1 (langdale)
    • Migration notes for 4.1 (langdale)
      • make 4.0 is now the minimum required make version
      • Complementary package installation ignores recommends
      • dev dependencies are now recommends
      • dropbear now recommends openssh-sftp-server
      • Classes now split by usage context
      • Missing local files in SRC_URI now triggers an error
      • QA check changes
      • Miscellaneous changes
      • Removed recipes
  • Release notes for 4.1 (langdale)
    • New Features / Enhancements in 4.1
    • Known Issues in 4.1
    • Recipe License changes in 4.1
    • Security Fixes in 4.1
    • Recipe Upgrades in 4.1
    • Contributors to 4.1
    • Repositories / Downloads for 4.1
  • Release notes for Yocto-4.1.1 (Langdale)
    • Security Fixes in Yocto-4.1.1
    • Fixes in Yocto-4.1.1
    • Known Issues in Yocto-4.1.1
    • Contributors to Yocto-4.1.1
    • Repositories / Downloads for Yocto-4.1.1
  • Release notes for Yocto-4.1.2 (Langdale)
    • Security Fixes in Yocto-4.1.2
    • Fixes in Yocto-4.1.2
    • Known Issues in Yocto-4.1.2
    • Contributors to Yocto-4.1.2
    • Repositories / Downloads for Yocto-4.1.2
  • Release notes for Yocto-4.1.3 (Langdale)
    • Security Fixes in Yocto-4.1.3
    • Fixes in Yocto-4.1.3
    • Known Issues in Yocto-4.1.3
    • Contributors to Yocto-4.1.3
    • Repositories / Downloads for Yocto-4.1.3
  • Release notes for Yocto-4.1.4 (Langdale)
    • Security Fixes in Yocto-4.1.4
    • Fixes in Yocto-4.1.4
    • Known Issues in Yocto-4.1.4
    • Contributors to Yocto-4.1.4
    • Repositories / Downloads for Yocto-4.1.4
• Release 4.0 (kirkstone)
  • Release 4.0 (kirkstone)
    • Migration notes for 4.0 (kirkstone)
      • Inclusive language improvements
      • Fetching changes
      • License changes
      • Removed recipes
      • Python changes
      • Prelink removed
      • Reproducible as standard
      • Supported host distribution changes
      • :append/:prepend in combination with other operators
      • Miscellaneous changes
  • Release notes for 4.0 (kirkstone)
    • New Features / Enhancements in 4.0
    • Known Issues in 4.0
    • Recipe License changes in 4.0
    • Security Fixes in 4.0
    • Recipe Upgrades in 4.0
    • Contributors to 4.0
    • Repositories / Downloads for 4.0
  • Release notes for 4.0.1 (kirkstone)
    • Security Fixes in 4.0.1
    • Fixes in 4.0.1
    • Contributors to 4.0.1
    • Repositories / Downloads for 4.0.1
  • Release notes for Yocto-4.0.2 (Kirkstone)
    • Security Fixes in Yocto-4.0.2
    • Fixes in Yocto-4.0.2
    • Known Issues in Yocto-4.0.2
    • Contributors to Yocto-4.0.2
    • Repositories / Downloads for Yocto-4.0.2
  • Release notes for Yocto-4.0.3 (Kirkstone)
    • Security Fixes in Yocto-4.0.3
    • Fixes in Yocto-4.0.3
    • Known Issues in Yocto-4.0.3
    • Contributors to Yocto-4.0.3
    • Repositories / Downloads for Yocto-4.0.3
  • Release notes for Yocto-4.0.4 (Kirkstone)
    • Security Fixes in Yocto-4.0.4
    • Fixes in Yocto-4.0.4
    • Known Issues in Yocto-4.0.4
    • Contributors to Yocto-4.0.4
    • Repositories / Downloads for Yocto-4.0.4
  • Release notes for Yocto-4.0.5 (Kirkstone)
    • Security Fixes in Yocto-4.0.5
    • Fixes in Yocto-4.0.5
    • Known Issues in Yocto-4.0.5
    • Contributors to Yocto-4.0.5
    • Repositories / Downloads for Yocto-4.0.5
  • Release notes for Yocto-4.0.6 (Kirkstone)
    • Security Fixes in Yocto-4.0.6
    • Fixes in Yocto-4.0.6
    • Known Issues in Yocto-4.0.6
    • Contributors to Yocto-4.0.6
    • Repositories / Downloads for Yocto-4.0.6
  • Release notes for Yocto-4.0.7 (Kirkstone)
    • Security Fixes in Yocto-4.0.7
    • Fixes in Yocto-4.0.7
    • Known Issues in Yocto-4.0.7
    • Contributors to Yocto-4.0.7
    • Repositories / Downloads for Yocto-4.0.7
  • Release notes for Yocto-4.0.8 (Kirkstone)
    • Security Fixes in Yocto-4.0.8
    • Fixes in Yocto-4.0.8
    • Known Issues in Yocto-4.0.8
    • Contributors to Yocto-4.0.8
    • Repositories / Downloads for Yocto-4.0.8
  • Release notes for Yocto-4.0.9 (Kirkstone)
    • Security Fixes in Yocto-4.0.9
    • Fixes in Yocto-4.0.9
    • Known Issues in Yocto-4.0.9
    • Contributors to Yocto-4.0.9
    • Repositories / Downloads for Yocto-4.0.9
  • Release notes for Yocto-4.0.10 (Kirkstone)
    • Security Fixes in Yocto-4.0.10
    • Fixes in Yocto-4.0.10
    • Known Issues in Yocto-4.0.10
    • Contributors to Yocto-4.0.10
    • Repositories / Downloads for Yocto-4.0.10
  • Release notes for Yocto-4.0.11 (Kirkstone)
    • Security Fixes in Yocto-4.0.11
    • Fixes in Yocto-4.0.11
    • Known Issues in Yocto-4.0.11
    • Contributors to Yocto-4.0.11
    • Repositories / Downloads for Yocto-4.0.11
  • Release notes for Yocto-4.0.12 (Kirkstone)
    • Security Fixes in Yocto-4.0.12
    • Fixes in Yocto-4.0.12
    • Known Issues in Yocto-4.0.12
    • Contributors to Yocto-4.0.12
    • Repositories / Downloads for Yocto-4.0.12
  • Release notes for Yocto-4.0.13 (Kirkstone)
    • Security Fixes in Yocto-4.0.13
    • Fixes in Yocto-4.0.13
    • Known Issues in Yocto-4.0.13
    • Contributors to Yocto-4.0.13
    • Repositories / Downloads for Yocto-4.0.13
  • Release notes for Yocto-4.0.14 (Kirkstone)
    • Security Fixes in Yocto-4.0.14
    • Fixes in Yocto-4.0.14
    • Known Issues in Yocto-4.0.14
    • Contributors to Yocto-4.0.14
    • Repositories / Downloads for Yocto-4.0.14
  • Release notes for Yocto-4.0.15 (Kirkstone)
    • Security Fixes in Yocto-4.0.15
    • Fixes in Yocto-4.0.15
    • Known Issues in Yocto-4.0.15
    • Contributors to Yocto-4.0.15
    • Repositories / Downloads for Yocto-4.0.15
  • Release notes for Yocto-4.0.16 (Kirkstone)
    • Security Fixes in Yocto-4.0.16
    • Fixes in Yocto-4.0.16
    • Known Issues in Yocto-4.0.16
    • Contributors to Yocto-4.0.16
    • Repositories / Downloads for Yocto-4.0.16
  • Release notes for Yocto-4.0.17 (Kirkstone)
    • Security Fixes in Yocto-4.0.17
    • Fixes in Yocto-4.0.17
    • Known Issues in Yocto-4.0.17
    • Contributors to Yocto-4.0.17
    • Repositories / Downloads for Yocto-4.0.17
• Release 3.4 (honister)
  • Migration notes for 3.4 (honister)
    • Override syntax changes
    • New host dependencies
    • Removed recipes
    • Removed classes
    • Prelinking disabled by default
    • Virtual runtime provides
    • Tune files moved to architecture-specific directories
    • Extensible SDK host extension
    • Package/recipe splitting
    • Image / SDK generation changes
    • Miscellaneous
  • Release notes for 3.4 (honister)
    • New Features / Enhancements in 3.4
    • Known Issues in 3.4
    • Recipe Licenses changes in 3.4
    • Security Fixes in 3.4
    • Recipe Upgrades in 3.4
    • Contributors to 3.4
    • Repositories / Downloads for 3.4
  • Release notes for 3.4.1 (honister)
    • Known Issues in 3.4.1
    • Security Fixes in 3.4.1
    • Fixes in 3.4.1
    • Contributors to 3.4.1
    • Repositories / Downloads for 3.4.1
  • Release notes for 3.4.2 (honister)
    • Security Fixes in 3.4.2
    • Fixes in 3.4.2
    • Contributors to 3.4.2
    • Repositories / Downloads for 3.4.2
  • Release notes for 3.4.3 (honister)
    • Security Fixes in 3.4.3
    • Fixes in 3.4.3
    • Contributors to 3.4.3
    • Repositories / Downloads for 3.4.3
  • Release notes for 3.4.4 (honister)
    • Security Fixes in 3.4.4
    • Fixes in 3.4.4
    • Known Issues
    • Contributors to 3.4.4
    • Repositories / Downloads for 3.4.4
• Release 3.3 (hardknott)
  • Minimum system requirements
  • Removed recipes
  • Single version common license file naming
  • New python3targetconfig class
  • setup.py path for Python modules
  • BitBake changes
  • Packaging changes
  • Miscellaneous changes
• Release 3.2 (gatesgarth)
  • Minimum system requirements
  • Removed recipes
  • Removed classes
  • pseudo path filtering and mismatch behaviour
  • MLPREFIX now required for multilib when runtime dependencies conditionally added
  • packagegroup-core-device-devel no longer included in images built for qemu* machines
  • DHCP server/client replaced
  • Packaging changes
  • Package QA check changes
  • Globbing no longer supported in file:// entries in SRC_URI
  • deploy class now cleans DEPLOYDIR before do_deploy
  • Custom SDK / SDK-style recipes need to include nativesdk-sdk-provides-dummy
  • ld.so.conf now moved back to main glibc package
  • Host DRI drivers now used for GL support within runqemu
  • Initramfs images now use a blank suffix
  • Image artifact name variables now centralised in image-artifact-names class
  • Miscellaneous changes
• Release 3.1 (dunfell)
  • Minimum system requirements
  • mpc8315e-rdb machine removed
  • Python 2 removed
  • Reproducible builds now enabled by default
  • Impact of ptest feature is now more significant
  • Removed recipes
  • features_check class replaces distro_features_check
  • Removed classes
  • SRC_URI checksum behaviour
  • npm fetcher changes
  • Packaging changes
  • Additional warnings
  • wic image type now used instead of live by default for x86
  • Miscellaneous changes
• Release 3.0 (zeus)
  • Init System Selection
  • LSB Support Removed
  • Removed Recipes
  • Packaging Changes
  • CVE Checking
  • BitBake Changes
  • Sanity Checks
  • Miscellaneous Changes
• Release 2.7 (warrior)
  • BitBake Changes
  • Eclipse Support Removed
  • qemu-native Splits the System and User-Mode Parts
  • The upstream-tracking.inc File Has Been Removed
  • The DISTRO_FEATURES_LIBC Variable Has Been Removed
  • License Value Corrections
  • Packaging Changes
  • Removed Recipes
  • Removed Classes
  • Miscellaneous Changes
• Release 2.6 (thud)
  • GCC 8.2 is Now Used by Default
  • Removed Recipes
  • Packaging Changes
  • XOrg Protocol dependencies
  • distutils and distutils3 Now Prevent Fetching Dependencies During the do_configure Task
  • linux-yocto Configuration Audit Issues Now Correctly Reported
  • Image/Kernel Artifact Naming Changes
  • SERIAL_CONSOLE Deprecated
  • Configure Script Reports Unknown Options as Errors
  • Override Changes
  • systemd Configuration is Now Split Into systemd-conf
  • Automatic Testing Changes
  • OpenSSL Changes
  • BitBake Changes
  • Security Changes
  • Post Installation Changes
  • Python 3 Profile-Guided Optimization
  • Miscellaneous Changes
• Release 2.5 (sumo)
  • Packaging Changes
  • Removed Recipes
  • Scripts and Tools Changes
  • BitBake Changes
  • Python and Python 3 Changes
  • Miscellaneous Changes
• Release 2.4 (rocko)
  • Memory Resident Mode
  • Packaging Changes
  • Removed Recipes
  • Kernel Device Tree Move
  • Package QA Changes
  • README File Changes
  • Miscellaneous Changes
• Release 2.3 (pyro)
  • Recipe-specific Sysroots
  • PATH Variable
  • Changes to Scripts
  • Changes to Functions
  • BitBake Changes
  • Absolute Symbolic Links
  • GPLv2 Versions of GPLv3 Recipes Moved
  • Package Management Changes
  • Removed Recipes
  • Wic Changes
  • QA Changes
  • Miscellaneous Changes
• Release 2.2 (morty)
  • Minimum Kernel Version
  • Staging Directories in Sysroot Has Been Simplified
  • Removal of Old Images and Other Files in tmp/deploy Now Enabled
  • Python Changes
    • BitBake Now Requires Python 3.4+
    • UTF-8 Locale Required on Build Host
    • Metadata Must Now Use Python 3 Syntax
    • Target Python Recipes Switched to Python 3
    • buildtools-tarball Includes Python 3
  • uClibc Replaced by musl
  • ${B} No Longer Default Working Directory for Tasks
  • runqemu Ported to Python
  • Default Linker Hash Style Changed
  • KERNEL_IMAGE_BASE_NAME no Longer Uses KERNEL_IMAGETYPE
  • IMGDEPLOYDIR Replaces DEPLOY_DIR_IMAGE for Most Use Cases
  • BitBake Changes
  • Swabber has Been Removed
  • Removed Recipes
  • Removed Classes
  • Minor Packaging Changes
  • Miscellaneous Changes
• Release 2.1 (krogoth)
  • Variable Expansion in Python Functions
  • Overrides Must Now be Lower-Case
  • Expand Parameter to getVar() and getVarFlag() is Now Mandatory
  • Makefile Environment Changes
  • libexecdir Reverted to ${prefix}/libexec
  • ac_cv_sizeof_off_t is No Longer Cached in Site Files
  • Image Generation is Now Split Out from Filesystem Generation
  • Removed Recipes
  • Class Changes
  • Build System User Interface Changes
  • ADT Removed
  • Poky Reference Distribution Changes
  • Packaging Changes
  • Tuning File Changes
  • Supporting GObject Introspection
  • Miscellaneous Changes
• Release 2.0 (jethro)
  • GCC 5
  • Gstreamer 0.10 Removed
  • Removed Recipes
  • BitBake datastore improvements
  • Shell Message Function Changes
  • Extra Development/Debug Package Cleanup
  • Recipe Maintenance Tracking Data Moved to OE-Core
  • Automatic Stale Sysroot File Cleanup
  • linux-yocto Kernel Metadata Repository Now Split from Source
  • Additional QA checks
  • Miscellaneous Changes
• Release 1.8 (fido)
  • Removed Recipes
  • BlueZ 4.x / 5.x Selection
  • Kernel Build Changes
  • SSL 3.0 is Now Disabled in OpenSSL
  • Default Sysroot Poisoning
  • Rebuild Improvements
  • QA Check and Validation Changes
  • Miscellaneous Changes
• Release 1.7 (dizzy)
  • Changes to Setting QEMU PACKAGECONFIG Options in local.conf
  • Minimum Git version
  • Autotools Class Changes
  • Binary Configuration Scripts Disabled
  • eglibc 2.19 Replaced with glibc 2.20
  • Kernel Module Autoloading
  • QA Check Changes
  • Removed Recipes
  • Miscellaneous Changes
• Release 1.6 (daisy)
  • archiver Class
  • Packaging Changes
  • BitBake
    • Matching Branch Requirement for Git Fetching
    • Python Definition substitutions
    • SVK Fetcher
    • Console Output Error Redirection
    • task-taskname Overrides
  • Changes to Variables
    • TMPDIR
    • PRINC
    • IMAGE_TYPES
    • COPY_LIC_MANIFEST
    • COPY_LIC_DIRS
    • PACKAGE_GROUP
    • Preprocess and Post Process Command Variable Behavior
  • Package Test (ptest)
  • Build Changes
  • qemu-native
  • core-image-basic
  • Licensing
  • CFLAGS Options
  • Custom Image Output Types
  • Tasks
  • update-alternative Provider
  • virtclass Overrides
  • Removed and Renamed Recipes
  • Removed Classes
  • Reference Board Support Packages (BSPs)
• Release 1.5 (dora)
  • Host Dependency Changes
  • atom-pc Board Support Package (BSP)
  • BitBake
  • QA Warnings
  • Directory Layout Changes
  • Shortened Git SRCREV Values
  • IMAGE_FEATURES
  • /run
  • Removal of Package Manager Database Within Image Recipes
  • Images Now Rebuild Only on Changes Instead of Every Time
  • Task Recipes
  • BusyBox
  • Automated Image Testing
  • Build History
  • udev
  • Removed and Renamed Recipes
  • Other Changes
• Release 1.4 (dylan)
  • BitBake
  • Build Behavior
  • Proxies and Fetching Source
  • Custom Interfaces File (netbase change)
  • Remote Debugging
  • Variables
  • Target Package Management with RPM
  • Recipes Moved
  • Removals and Renames
• Release 1.3 (danny)
  • Local Configuration
    • SSTATE_MIRRORS
    • bblayers.conf
  • Recipes
    • Python Function Whitespace
    • proto= in SRC_URI
    • nativesdk
    • Task Recipes
    • IMAGE_FEATURES
    • Removed Recipes
  • Linux Kernel Naming

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