0.41.1

This point release has a few very important fixes for you all that could not wait.

• machine
  • esp32c3: correct pin interrupt setup call that was overlooked from #5320
• runtime
  • esp32s3: wait for TIMG0 update register to clear before reading timer registers
• net
  • update net module to a version that is backwards compatible with Go 1.25.x to fix #5332

0.41.0

This release is the most feature packed yet with over 150 commits to our main repo alone. We added Go 1.26 support to keep you up to date with the latest work from the mothership. We also have many improvements to our developer tooling and compatibility. And some big additions when it comes to hardware support, with ESP32 wireless, and the new Arduino UNO Q board too.

• general
  • go.mod, compiler: bump minimum Go version to 1.23
  • builder: support Go 1.26 now
  • feat: add inheritable-only field to filter processor-level targets (#5270)
  • feature: add esp32flash flash method for esp32s3/esp32c3/esp32/esp8266
  • flashing: introduce flash method 'esp32jtag' for esp32c3/esp32s3 targets
  • fashing: add "adb" flash method using Android Debug Bridge
  • main: auto-use best available flashing options on esp32
  • espflasher: update to espflasher 0.6.0
• compiler
  • implement method-set based AssignableTo and Implements (#5304)
  • simplify createObjectLayout
  • implement copy directly
  • fix min/max on floats by using intrinsics
  • add element layout to sliceAppend
  • add intrinsic for crypto/internal/constanttime.boolToUint8
  • fix SyscallN handling for Windows on Go 1.26+
• core
  • reflect: add TypeAssert
  • reflect: fix TypeAssert for structs
  • sync: add WaitGroup.Go
  • os: add UserCacheDir and UserConfigDir
  • os: implement Lchown function for changing file ownership (#5161)
  • testing: add b.ReportMetric()
  • errors: add errors package to passing list
  • internal/gclayout: use correct lengths
  • internal/abi: add EscapeNonString, EscapeToResultNonString
  • internal, runtime: add internal fips bool
  • internal/itoa: resurrect from Go stdlib
  • internal/syscall/unix: implement GetRandom for WASI targets
  • interp: make ptrtoint size mismatch a recoverable error
  • loader: support "all:" prefix in //go:embed patterns
  • loader, crypto/internal/entropy: fix 32 MiB RAM overflow on microcontrollers
  • loader, unicode/utf8: fix hiBits overflow on 16-bit AVR targets
  • builder: order embedded files deterministically
  • builder: fix panic in findPackagePath when using -size short
  • builder: fix SIGSEGV when stripping duplicate function definitions
  • builder, runtime: fix duplicate symbol error with Go 1.26+ on Windows
  • builder: use target-specific -march for RISC-V library compilation
  • transform: modify output format from the -print-allocs flag to match the go coverage tool format
  • cgo: allow for changes to short-enums flag
  • wasm: add more stubbed file operations
• machine
  • esp32c3: implement BlockDevice for esp32c3 flash
  • esp32c3: clear GPIO STATUS before dispatching pin callbacks
  • esp32c3: implement USBDevice using interrupts
  • esp32c3: add Enable stub for QEMU test target
  • esp32c3: fix interrupt disable handling
  • esp32c3: clear MCAUSE after handling interrupt
  • esp32c3: map missing IRAM sections in linker script
  • esp32c3: fix to use PROVIDE() for WiFi/BLE ROM function addresses to allow blob overrides
  • esp32c3: add WiFi/BLE ROM linker support
  • esp32c3: use TIMG0 alarm interrupt for sleepTicks instead of busy-waiting
  • esp32s3: implement Pin.SetInterrupt for GPIO pin change interrupts
  • esp32s3: use edge-triggered CPU interrupt for GPIO pin interrupts
  • esp32s3: add interrupt support (#5244)
  • esp32s3: switch USB implementation to use interrupts instead of polling
  • esp32s3: replace inline ISR with full interrupt vector handler
  • esp32s3: use TIMG0 alarm interrupt for sleepTicks
  • esp32s3: improve exception handlers, add procPin/procUnpin, and linker wrap flags
  • esp32s3: fix Xtensa register window spill using recursive call4 in task switching
  • esp32s3: update linker script and boot assembly for multi-page flash XIP mapping
  • esp32s3: add flash XIP boot assembly with cache/MMU init
  • esp32s3: implement SPI (#5169)
  • esp32s3: implement I2C interface (#5210)
  • esp32s3: implement RNG based on onboard hardware random number generator
  • esp32s3,esp32c3: add USB serial support
  • esp32s3,esp32c3: add txStalled flag to skip USB serial spin when no host
  • esp32s3,esp32c3: make USB Serial/JTAG writes non-blocking when FIFO is full
  • esp32c3/esp32s3: refactor ADC implementation to reduce code duplication
  • esp32s3,esp32c3: add ADC support (#5231)
  • esp32s3,esp32c3: add PWM support (#5215)
  • esp32c3/esp32s3: refactoring and corrections for SPI implementation
  • esp32xx: add WASM simulator support for ESP32-C3/ESP32-S3 targets
  • esp32: default SPI CS pin to NoPin when unset
  • esp: fix tinygo_scanCurrentStack to spill register windows
  • stm32: fix UART interrupt storm caused by uncleared overrun error
  • stm32: fix PWM problem due to register shifting
  • stm32: add STM32U585 target definition and runtime
  • stm32: add STM32U5 GPIO, pin interrupts, and UART support
  • stm32: add STM32U5 I2C support
  • stm32: add STM32U5 SPI support
  • stm32u585: implement ADC
  • stm32g0b1: add support (#5150)
  • stm32g0b1: add Watchdog + ADC support (#5158)
  • stm32l0: add flash support
  • stm32l0x1,l0x2: TIM: adapt to 32-bit register access
  • stm32g0: sync with updated stm32 device files
  • attiny85: add USI-based SPI support (#5181)
  • attiny85: add PWM support (#5171)
  • rp: add Close function to UART to allow for removing all system resources/power usage
  • rp: use blockReset() and unresetBlockWait() helper functions for peripheral reset/unreset
  • rp2: prevent PWM Period method overflow
  • rp2: add per-byte timeout budget for I2C (#5189)
  • feather-m0: export UART0 and pins
  • usb/cdc: better ring buffer implementation (#5209)
  • fix: replace ! with ~ for register mask
  • atmega328p_simulator: add correct build tag for arduino_uno after renaming
• net
  • update to Go 1.26.2 net package with UDP and JS improvements
• runtime
  • implement fminimum/fmaximum
  • make timeoffset atomic
  • add MemStats.HeapObjects
  • handle GODEBUG on wasip2 (#5312)
  • fix Darwin syscall return value truncation and lost arguments
  • add syscall.runtimeClearenv for Go 1.26
  • split syscall functions for darwin changes for 1.26
  • fix: init heap before random number seed on wasm platforms
• targets
  • add esp32s3-supermini board target
  • add support for Seeedstudio Xiao-RP2350 board
  • add Shrike Lite board (#5170)
  • rename arduino target to arduino-uno
  • add pins/setup for Arduino UNO Q board QWIIC connector
  • correct pin mapping for Arduino UNO Q STM32 MCU
  • add stm32u585 openocd commands for flashing on Arduino UNO Q
  • correct name/tag use for esp32s3-wroom1 board
  • modify esp32, esp32s3, esp32c3, & esp8266 targets to use built-in esp32flash
  • switch rp2040/rp2350 to default to tasks scheduler
  • change default stack size for esp32c3 and esp32s3 to 8196
  • swan: rename group build tag stm32l4x5 => stm32l4y5 to avoid clash with stm32 device name
  • nucleo-f722ze: add build-tag stm32f722
  • fix: set stm32u5x clock rate to default
  • create generic targets for esp32 boards
• libs
  • stm32-svd: update submodule
  • update tools/gen-device-svd for recent changes to stm32-svd file structure (#5212)
• build/test
  • build: use Golang 1.26 for all builds
  • build: actually use the version of llvm we are supposed to be testing by using brew link command
  • build: let scoop run updates to resolve binaryen install failures on Windows
  • ci: don't double zip release artifacts
  • test: increase default timeout from 1 to 2 minutes to prevent spurious CI fails
  • testdata: fix flaky timers test by draining ticker channel after Stop
  • testdata: more corpus entries (#5182)
  • add soypat/lneto to corpus
  • GNUmakefile: add context and expvar to stdlib tests
  • GNUmakefile: add encoding/xml to stdlib tests on Linux
  • main (test): skip mipsle test if the emulator is missing
  • make: remove machine without board from smoketest
  • stm32: add Arduino UNO Q to smoketests
  • flake: bump to nixpkgs 25.11
  • chore: update all github actions to latest versions
  • fix: use external 7zip for scoop installs on Windows

0.40.1

An important point release with some critical fixes and improvements that just could not wait. Thank you very much to our global team of humans who joined together so quickly to get this out for all of us!

• machine
  • nrf: fix flash writes when SoftDevice is enabled
• runtime
  • runtime: avoid fixed math/rand sequence on RP2040/RP2350 (#5124)
  • runtime: add calls to initRand() during run() for all schedulers
  • runtime: call initRand() before initHeap() during initialization
  • runtime: use rand_hwrng hardwareRand for RP2040/RP2350 (#5135)
• libs
  • picolibc: use updated location for git repo

0.40.0

Our final release for 2025 includes a number of really excellent improvements to close out the year. We have plenty of bugfixes and stability enhancements to make your life better and easier. For example, new updates to the GC that are up to 10% faster! Not to mention fixing some very tricky race conditions. Of course we have new hardware support, like the Xiao ESP32-S3 board.

• general
  • all: add full LLVM 20 support
  • core: feat: enable //go:linkname pragma for globals
  • core: feature: Add flag to ignore go compatibility matrix (#5078)
• compiler
  • emit an error when the actual arch doesn't match GOARCH
  • mark string parameters as readonly
  • use Tarjan's SCC algorithm to detect loops for defer
  • lower "large stack" limit to 16kb
• core
  • shrink bdwgc library
  • Fix linker errors for runtime.vgetrandom and crypto/internal/sysrand.fatal
  • fix: add TryLock to sync.RWMutex
  • fix: correct linter issues exposed by the fix in #4679
  • fix: don't hardcode success return state
  • fix: expand RTT debugger compatibility
  • internal/task (threads): save stack bounds instead of scanning under a lock
  • internal/task: create detached threads and fix error handling
  • interp: better errors when debugging interp
  • transform (gc): create stack slots in callers of external functions
  • internal/task: prevent semaphore resource leak for threads scheduler
• machine
  • cortexm: optimize code size for the HardFault_Handler
  • fe310: add I2C pins for the HiFive1b
  • clarify WriteAt semantics of BlockDevice
  • fix deprecated AsmFull comment (#5005)
  • make sure DMA buffers do not escape unnecessarily
  • only enable USB-CDC when needed
  • use larger SPI MAXCNT on nrf52833 and nrf52840
  • fix: update m.queuedBytes when clamping output to avoid corrupting sentBytes
  • fix: use int64 in ReadTemperature to avoid overflow
  • fix(rp2): disable DBGPAUSE on startup
  • fix(rp2): possible integer overflow while computing factors for SPI baudrate
  • fix(rp2): reset spinlocks at startup
  • fix(rp2): switch spinlock busy loop to wfe
  • fix(rp2): use side-effect-free spinlocks
  • nrf: add ADC_VDDH which is an ADC pin for VDDH
  • nrf: don't block SPI transfer
  • nrf: don't set PSELN, it's ignored in single ended mode anyway
  • nrf: fix typo in ADC configuration
  • nrf: refactor SoftDevice enabled check
  • nrf: rename pwmPin to adcPin
  • nrf: support flash operations while the SoftDevice is enabled
  • rp2040: allow writing to the UART inside interrupts
  • machine,nrf528: stop the bus only once on I2C bus error and ensures the first error is returned
• net
  • update submodule to latest commits
• runtime
  • (avr): fix infinite longjmp loop if stack is aligned to 256 bytes
  • (gc_blocks.go): clear full size of allocation
  • (gc_blocks.go): make sweep branchless
  • (gc_blocks.go): simplify scanning logic
  • (gc_blocks.go): use a linked stack to scan marked objects
  • (gc_blocks.go): use best-fit allocation
  • (gc_boehm.go): fix world already stopped check
  • (wasm): scan the system stack
  • fix sleep duration for long sleeps
  • remove copied code for nrf52840
  • src/syscall: update src buffer after write
  • wasm: fix C realloc and optimize it a bit
• targets
  • add xiao-esp32s3 board target
  • Add ESP32-S3 support (#5091)
  • Added Gopher ARCADE board
  • Create "pico2-ice" target board (#5062)
• build/test
  • Add testing.T.Context() and testing.B.Context()
  • create separate go.mod file for testing dependencies for wasm tests that use Chromium headless browser to avoid use of older incompatible version.
  • go back to normal scheduler instead of tasks scheduler for macos CI
  • update CI to use Go 1.25.5
  • update macOS GH actions builds to handle sunset of macOS 13
  • use task scheduler on macOS builds to avoid test race condition lockups
  • update all CI builds to use latest stable Go release. Also update some of the actions to their latest releases.
  • update GH actions builds to use Go 1.25.4
  • uninstall cmake before install
  • fix: point the submodule for musl-lib to a mirror in the TinyGo GitHub org
  • fix: remove macOS 15 from CI build matrix (conflicts with macOS 14 build)
  • fix: separate host expected bytes from device intended bytes
  • fix/typo: makeESPFirmwareImage
  • make: GNUmakefile: shrink TinyGo binaries on Linux
  • move the directory list into a variable
  • several improvements to the macOS GH actions build
  • Fix for #4678: top-level 'make lint' wasn't working
  • fix: increase the timeout for chromedp to connect to the headless browser used for running the wasm tests.
  • testdata: some more packages for the test corpus

0.39.0

This release has what you need the most right now, which is Go 1.25 support! Of course it has other new features, such as adding multicore support for the RP2350 family of processors as well as for macOS. We've also got fixes, and as always further improvements for reflect support and stdlib packages. Plus a couple of new boards too!

• general
  • all: add Go 1.25 support
  • net: update to latest tinygo net package
  • docs: clarify build verification step for macOS users
  • Add flag to skip Renesas SVD builds
• build
  • Makefile: install missing dlmalloc files
  • flash: add -o flag support to save built binary (Fixes #4937) (#4942)
  • fix: update version of clang to 17 to accommodate latest Go 1.25 docker base image
• ci
  • chore: update all CI builds to test Go 1.25 release
  • fix: disable test-newest since CircleCI seems unable to download due to rate-limits on Dockerhub
  • ci: rename some jobs to avoid churn on every Go/LLVM version bump
  • ci: make the goroutines test less racy
  • tests: de-flake goroutines test
• compiler
  • compiler: implement internal/abi.Escape
• main
  • main: show the compiler error (if any) for tinygo test -c
  • chore: correct GOOS=js name in error messages for WASM
• machine
  • machine: add international keys
  • machine: remove some unnecessary "// peripherals:" comments
  • machine: add I2C pin comments
  • machine: standardize I2C errors with "i2c:" prefix
  • machine: make I2C usable in the simulator
  • fix: add SPI and I2C to teensy 4.1 (#4943)
  • rp2: use the correct channel mask for rp2350 ADC; hold lock during read (#4938)
  • rp2: disable digital input for analog inputs
• runtime
  • runtime: ensure time.Sleep(d) sleeps at least d
  • runtime: stub out weak pointer support
  • runtime: implement dummy AddCleanup
  • runtime: enable multi-core scheduler for rp2350
  • internal/task: use -stack-size flag when starting a new thread
  • internal/task: add SA_RESTART flag to GC interrupts
  • internal/task: a few small correctness fixes
  • internal/gclayout: make gclayout values constants
  • darwin: add threading support and use it by default
• standard library
  • sync: implement sync.Swap
  • reflect: implement Method.IsExported
• testing
  • testing: stub out testing.B.Loop
• targets
  • stm32: add support for the STM32L031G6U6
  • add metro-rp2350 board definition (#4989)
  • rp2040/rp2350: set the default stack size to 8k for rp2040/rp2350 based boards where this was not already the case

0.38.0

This release includes some very exciting new features, in particular our first multicore support! Initially available on the RP2040 microcontrollers, now TinyGo can use both cores at the same time for true concurrency in hardware. Another very powerful new capability added in this release is USB Mass Storage Device (MSD) support on the RP2040/RP2350, SAMD21, and SAMD51 series of processors. We have also added experimental Boehm garbage collector for WebAssembly to speed up your production code.

• general
  • go.*: upgrade golang.org/x/tools to v0.30.0
  • all: add support for LLVM 20
• build
  • go back to using MinoruSekine/setup-scoop for Windows CI builds
  • flake.*: upgrade to nixpkgs 25.05, LLVM 20
  • Makefile: only detect ccache command when needed
  • Makefile: create random filename inside rule
  • Makefile: don't set GOROOT
  • Makefile: call uname at most once
  • Makefile: only read NodeJS version when it is needed
• compiler
  • add support for GODEBUG=gotypesalias=1
  • interp: fix copy() from/to external buffers
  • add -nobounds (similar to -gcflags=-B)
  • compileopts: add library version to cached library path
  • builder: build wasi-libc inside TinyGo
  • builder: simplify bdwgc libc dependency
  • builder: don't use precompiled libraries
  • compileopts: enable support for GOARCH=wasm in tinygo test
• fixes
  • rp2350: Fix DMA to SPI transmits on RP2350 (#4903)
  • microbit v2: use OpenOCD flash method on microbit v2 when using Nordic Semi SoftDevice
  • main: display all of the current GC options for the -gc flag
  • Remove duplicated error handling
  • sync: fix TestMutexConcurrent test
  • fix race condition in testdata/goroutines.go
  • fix build warnings on Windows ARM
• machine
  • usb: add USB mass storage class support
  • implement usb receive message throttling
  • declare usb endpoints per-platform
  • samd21: implement watchdog
  • samd51: write to flash memory in 512 byte long chunks
  • samd21: write to flash memory in 64 byte long chunks
  • don't inline RTT WriteByte everywhere
  • rp2: unexport machine-specific errors
  • rp2: discount scheduling delays in I2C timeouts (#4876)
  • use pointer receiver in simulated PWM peripherals
  • add simulated PWM/timer peripherals
  • rp2: expose usb endpoint stall handling
  • arm: clear pending interrupts before enabling them
  • rp2: merge common usb code (#4856)
• main
  • add "cores" and "threads" schedulers to help text
  • add StartPos and EndPos to -json build output
  • change -json flag to match upstream Go
• runtime
  • don't lock the print output inside interrupts
  • don't try to interrupt other cores before they are started
  • implement NumCPU for the multicore scheduler
  • add support for multicore scheduler
  • refactor obtaining the system stack
  • interrupt: add Checkpoint type
  • add exportedFuncPtr
  • avoid an allocation in (*time.Timer).Reset
  • stub runtime signal functions for os/signal on wasip1
  • move timeUnit to a single place
  • implement NumCPU for -scheduler=threads
  • move mainExited boolean
  • internal/task: rename tinygo_pause to tinygo_task_exit
  • map every goroutine to a new OS thread
  • refactor timerQueue
  • make conservative and precise GC MT-safe
  • internal/task: implement atomic primitives for preemptive scheduling
  • Use diskutil on macOS to extract volume name and path for FAT mounts #4928
• standard library
  • net: update submodule to latest commits
  • runtime/debug: add GC related stubs
  • metrics: flesh out some of the metric types
  • reflect: Chan related stubs
  • os: handle relative and abs paths in Executable()
  • os: add os.Executable() for Darwin
  • sync: implement RWMutex using futexes
  • reflect: Add SliceOf, ArrayOf, StructOf, MapOf, FuncOf
• targets
  • rp2040: add multicore support
  • riscv32: use gdb binary as a fallback
  • add target for Microbit v2 with SoftDevice S140 support for both peripheral and central
  • windows: use MSVCRT.DLL instead of UCRT on i386
  • windows: add windows/386 support
  • arm64: remove unnecessary .section directive
  • riscv-qemu: actually sleep in time.Sleep()
  • riscv: define CSR constants and use them where possible
  • darwin: support Boehm GC (and use by default)
  • windows: add support for the Boehm-Demers-Weiser GC
  • windows: fix wrong register for first parameter
• wasm
  • add Boehm GC support
  • refactor/modify stub signal handling
  • don't block //go:wasmexport because of running goroutines
  • use int64 instead of float64 for the timeUnit
• boards
  • Add board support for BigTreeTech SKR Pico (#4842)

0.37.0

This is probably our fastest time in-between full releases, especially given all of the excellent work that has made it in. A few highlights are updated compatibility with the latest WASI work from the Bytecode Alliance, faster speed and PIO support for the RP2350, and a new garbage collector option for Linux. Plus a bunch of critical fixes to make your life better!

• general
  • add the Boehm-Demers-Weiser GC on Linux
• ci
  • add more tests for wasm and baremetal
• compiler
  • crypto/internal/sysrand is allowed to use unsafe signatures
• examples
  • add goroutine benchmark to examples
• fixes
  • ensure use of pointers for SPI interface on atsam21/atsam51 and other machines/boards that were missing implementation (#4798)
  • replace loop counter with hw timer for USB SetAddressReq on rp2040 (#4796)
• internal
  • update to go.bytecodealliance.org@v0.6.2 in GNUmakefile and internal/wasm-tools
  • exclude certain files when copying package in internal/cm
  • update to go.bytecodealliance.org/cm@v0.2.2 in internal/cm
  • remove old reflect.go in internal/reflectlite
• loader
  • use build tags for package iter and iter methods on reflect.Value in loader, iter, reflect
  • add shim for go1.22 and earlier in loader, iter
• machine
  • bump rp2040 to 200MHz (#4768)
  • correct register address for Pin.SetInterrupt for rp2350 (#4782)
  • don't block the rp2xxx UART interrupt handler
  • fix RP2040 Pico board on the playground
  • add flash support for rp2350 (#4803)
• os
  • add stub Symlink for wasm
• refactor
  • use *SPI everywhere to make consistent for implementations. Fixes #4663 "in reverse" by making SPI a pointer everywhere, as discussed in the comments.
• reflect
  • add Value.SetIter{Key,Value} and MapIter.Reset in reflect, internal/reflectlite
  • embed reflectlite types into reflect types in reflect, internal/reflectlite
  • add Go 1.24 iter.Seq[2] methods
  • copy reflect iter tests from upstream Go
  • panic on Type.CanSeq[2] instead of returning false
  • remove strconv.go
  • remove unused go:linkname functions
• riscv-qemu
  • add VirtIO RNG device
  • increase stack size
• runtime
  • only allocate heap memory when needed
  • remove unused file func.go
  • use package reflectlite
• transform
  • cherry-pick from #4774

0.36.0

• general
  • add initial Go 1.24 support
  • add support for LLVM 19
  • update license for 2025
  • make small corrections for README regarding wasm
  • use GOOS and GOARCH for building wasm simulated boards
  • only infer target for wasm when GOOS and GOARCH are set correctly, not just based on file extension
  • add test-corpus-wasip2
  • use older image for cross-compiling builds
  • update Linux builds to run on ubuntu-latest since 20.04 is being retired
  • ensure build output directory is created
  • add NoSandbox flag to chrome headless that is run during WASM tests, since this is now required for Ubuntu 23+ and we are using Ubuntu 24+ when running Github Actions
  • update wasmtime used for CI to 29.0.1 to fix issue with install during CI tests
  • update to use Get-CimInstance as wmic is being deprecated on WIndows
  • remove unnecessary executable permissions
  • goenv: update to new v0.36.0 development version
• compiler
  • builder: fix parsing of external ld.lld error messages
  • cgo: mangle identifier names
  • interp: correctly mark functions as modifying memory
  • add buildmode=wasi-legacy to support existing base of users who expected the older behavior for wasi modules to not return an exit code as if they were reactors
• standard library
  • crypto/tls: add Dialer.DialContext() to fix websocket client
  • crypto/tls: add VersionTLS constants and VersionName(version uint16) method that turns it into a string, copied from big go
  • internal/syscall/unix: use our own version of this package
  • machine: replace hard-coded cpu frequencies on rp2xxx
  • machine: bump rp2350 CPUFrequency to 150 MHz
  • machine: compute rp2 clock dividers from crystal and target frequency
  • machine: remove bytes package dependency in flash code
  • machine/usb/descriptor: avoid bytes package
  • net: update to latest submodule with httptest subpackage and ResolveIPAddress implementation
  • os: add File.Chdir support
  • os: implement stub Chdir for non-OS systems
  • os/file: add file.Chmod
  • reflect: implement Value.Equal
  • runtime: add FIPS helper functions
  • runtime: manually initialize xorshift state
  • sync: move Mutex to internal/task
  • syscall: add wasip1 RandomGet
  • testing: add Chdir
  • wasip2: add stubs to get internal/syscall/unix to work
• fixes
  • correctly handle calls for GetRNG() when being made from nrf devices with SoftDevice enabled
  • fix stm32f103 ADC
  • wasm: correctly handle id lookup for finalizeRef call
  • wasm: avoid total failure on wasm finalizer call
  • wasm: convert offset as signed int into unsigned int in syscall/js.stringVal in wasm_exec.js
• targets
  • rp2350: add pll generalized solution; fix ADC handles; pwm period fix
  • rp2350: extending support to include the rp2350b
  • rp2350: cleanup: unexport internal USB and clock package variable, consts and types
  • nrf: make ADC resolution changeable
  • turn on GC for TKey1 device, since it does in fact work
  • match Pico2 stack size to Pico
• boards
  • add support for Pimoroni Pico Plus2
  • add target for pico2-w board
  • add comboat_fw tag for elecrow W5 boards with Combo-AT Wifi firmware
  • add support for Elecrow Pico rp2350 W5 boards
  • add support for Elecrow Pico rp2040 W5 boards
  • add support for NRF51 HW-651
  • add support for esp32c3-supermini
  • add support for waveshare-rp2040-tiny
• examples
  • add naive debouncing for pininterrupt example

0.35.0

This is our last release of the year, and we've got plenty of presents for all of us tiny gophers!
We are happy to show improved error messages, and also a new HTML size report to help figure out what exactly is ending up in that binary.
There are several CGo improvements, such as support for function-like macros.
We've got a whole slew of improvements for reflection and runtime support, alongside several fixes and improvements for WASM.
New hardware! Support for the new RP2350 microcontroller, with the Raspberry Pi Pico2 and Pimoroni Tiny2350 boards.
And we are excited to bring our first software RISC-V running on FPGA to TinyGo with the newly added Tillitis TKey hardware device.

• general
  • update cmsis-svd library
  • use default UART settings in the echo example
  • goenv: also show git hash with custom build of TinyGo
  • goenv: support parsing development versions of Go
  • main: parse extldflags early so we can report the error message
• compiler
  • builder: whitelist temporary directory env var for Clang invocation to fix Windows bug
  • builder: fix cache paths in -size=full output
  • builder: work around incorrectly escaped DWARF paths on Windows (Clang bug)
  • builder: fix wasi-libc path names on Windows with -size=full
  • builder: write HTML size report
  • cgo: support C identifiers only referred to from within macros
  • cgo: support function-like macros
  • cgo: support errno value as second return parameter
  • cgo: add support for #cgo noescape lines
  • compiler: fix bug in interrupt lowering
  • compiler: allow panic directly in defer
  • compiler: fix wasmimport -> wasmexport in error message
  • compiler: support //go:noescape pragma
  • compiler: report error instead of crashing when instantiating a generic function without body
  • interp: align created globals
• standard library
  • machine: modify i2s interface/implementation to better match specification
  • os: implement StartProcess
  • reflect: add Value.Clear
  • reflect: add interface support to NumMethods
  • reflect: fix AssignableTo for named + non-named types
  • reflect: implement CanConvert
  • reflect: handle more cases in Convert
  • reflect: fix Copy of non-pointer array with size > 64bits
  • runtime: don't call sleepTicks with a negative duration
  • runtime: optimize GC scanning (findHead)
  • runtime: move constants into shared package
  • runtime: add runtime.fcntl function for internal/syscall/unix
  • runtime: heapptr only needs to be initialized once
  • runtime: refactor scheduler (this fixes a few bugs with -scheduler=none)
  • runtime: rewrite channel implementation to be smaller and more flexible
  • runtime: use SA_RESTART when registering a signal for os/signal
  • runtime: implement race-free signals using futexes
  • runtime: run deferred functions in Goexit
  • runtime: remove Cond which seems to be unused
  • runtime: properly handle unix read on directory
  • runtime/trace: stub all public methods
  • sync: don't use volatile in Mutex
  • sync: implement WaitGroup using a (pseudo)futex
  • sync: make Cond parallelism-safe
  • syscall: use wasi-libc tables for wasm/js target
• targets
  • mips: fix a bug when scanning the stack
  • nintendoswitch: get this target to compile again
  • rp2350: add support for the new RP2350
  • rp2040/rp2350 : make I2C implementation shared for rp2040/rp2350
  • rp2040/rp2350 : make SPI implementation shared for rp2040/rp2350
  • rp2040/rp2350 : make RNG implementation shared for rp2040/rp2350
  • wasm: revise and simplify wasmtime argument handling
  • wasm: support //go:wasmexport functions after a call to time.Sleep
  • wasm: correctly return from run() in wasm_exec.js
  • wasm: call process.exit() when go.run() returns
  • windows: don't return, exit via exit(0) instead to flush stdout buffer
• boards
  • add support for the Tillitis TKey
  • add support for the Raspberry Pi Pico2 (based on the RP2040)
  • add support for Pimoroni Tiny2350

0.34.0

This release adds support for //go:wasmexport that is a standardized way to export WebAssembly functions to the host, improves garbage collection performance (especially on wasm), adds big-endian MIPS support (GOOS=mips), and adds two new boards! It also contains a number of smaller improvements and bug fixes.

• general
  • fix GOOS=wasip1 for tinygo test
  • add -C DIR flag
  • add initial documentation for project governance
  • add -ldflags='-extldflags=...' support
  • improve usage message with tinygo help and when passing invalid parameters
• compiler
  • builder: remove environment variables when invoking Clang, to avoid the environment changing the behavior
  • builder: check for the Go toolchain version used to compile TinyGo
  • cgo: add C.CBytes implementation
  • compiler: fix passing weirdly-padded structs as parameters to new goroutines
  • compiler: support pragmas on generic functions
  • compiler: do not let the slice buffer escape when casting a []byte or []rune to a string, to help escape analysis
  • compiler: conform to the latest iteration of the wasm types proposal
  • loader: don't panic when main package is not named 'main'
  • loader: make sure we always return type checker errors even without type errors
  • transform: optimize range over []byte(string)
• standard library
  • crypto/x509: add package stub to build crypto/x509 on macOS
  • machine/usb/adc/midi: fix PitchBend
  • os: add Truncate stub for baremetal
  • os: add stubs for os.File deadlines
  • os: add internal net.newUnixFile for the net package
  • runtime: stub runtime_{Before,After}Exec for linkage
  • runtime: randomize map accesses
  • runtime: support maps.Clone
  • runtime: add more fields to MemStats
  • runtime: implement newcoro, coroswitch to support package iter
  • runtime: disallow defer in interrupts
  • runtime: add support for os/signal on Linux and MacOS
  • runtime: add gc layout info for some basic types to help the precise GC
  • runtime: bump GC mark stack size to avoid excessive heap rescans
• targets
  • darwin: use Go standard library syscall package instead of a custom one
  • fe310: support GPIO PinInput
  • mips: fix compiler crash with GOMIPS=softfloat and defer
  • mips: add big-endian (GOARCH=mips) support
  • mips: use MIPS32 (instead of MIPS32R2) as the instruction set for wider compatibility
  • wasi: add relative and absolute --dir options to wasmtime args
  • wasip2: add wasmtime -S args to support network interfaces
  • wasm: add //go:wasmexport support (for all WebAssembly targets)
  • wasm: use precise instead of conservative GC for WebAssembly (including WASI)
  • wasm-unknown: add bulk memory flags since basically every runtime has it now
• boards
  • add RAKwireless RAK4631
  • add WaveShare ESP-C3-32S-Kit