0.31.2

general
- update the net submodule to updated version with Buffers implementation
compiler
- syscall: add wasm_unknown tag to some additional files so it can compile more code
standard library
- runtime: add Frame.Entry field

0.31.1

general
- fix Binaryen build in make task
- update final build stage of Docker dev image to go1.22
- only use GHA cache for building Docker dev image
- update the net submodule to latest version
compiler
- interp: make getelementptr offsets signed
- interp: return a proper error message when indexing out of range

0.31.0

general
- remove LLVM 14 support
- add LLVM 17 support, and use it by default
- add Nix flake support
- update bundled Binaryen to version 116
- add ports subcommand that lists available serial ports for -port and -monitor
- support wasmtime version 14
- add -serial=rtt for serial output over SWD
- add Go 1.22 support and use it by default
- change minimum Node.js version from 16 to 18
compiler
- use the new LLVM pass manager
- allow systems with more stack space to allocate larger values on the stack
- build: fix a crash due to sharing GlobalValues between build instances
- cgo: add C._Bool type
- cgo: fix calling CGo callback inside generic function
- compileopts: set purego build tag by default so that more packages can be built
- compileopts: force-enable CGo to avoid build issues
- compiler: fix crash on type assert on interfaces with no methods
- interp: print LLVM instruction in traceback
- interp: support runtime times by running them at runtime
- loader: enforce Go language version in the type checker (this may break existing programs with an incorrect Go version in go.mod)
- transform: fix bug in StringToBytes optimization pass
standard library
- crypto/tls: stub out a lot of functions
- internal/task, machine: make TinyGo code usable with "big Go" CGo
- machine: implement I2C.SetBaudRate consistently across chips
- machine: implement SPI.Configure consistently across chips
- machine: add DeviceID for nrf, rp2040, sam, stm32
- machine: use smaller UART buffer size on atmega chips
- machine/usb: allow setting a serial number using a linker flag
- math: support more math functions on baremetal (picolibc) systems
- net: replace entire net package with a new one based on the netdev driver
- os/user: add bare-bones implementation of this package
- reflect: stub CallSlice and FuncOf
- reflect: add TypeFor[T]
- reflect: update IsZero to Go 1.22 semantics
- reflect: move indirect values into interface when setting interfaces
- runtime: stub Breakpoint
- sync: implement trylock
targets
- atmega: use UART double speed mode for fewer errors and higher throughput
- atmega328pb: refactor to enable extra uart
- avr: don't compile large parts of picolibc (math, stdio) for LLVM 17 support
- esp32: switch over to the official SVD file
- esp32c3: implement USB_SERIAL for USBCDC communication
- esp32c3: implement I2C
- esp32c3: implement RNG
- esp32c3: add more ROM functions and update linker script for the in-progress wifi support
- esp32c3: update to newer SVD files
- rp2040: add support for UART hardware flow control
- rp2040: add definition for machine.PinToggle
- rp2040: set XOSC startup delay multiplier
- samd21: add support for UART hardware flow control
- samd51: add support for UART hardware flow control
- wasm: increase default stack size to 64k for wasi/wasm targets
- wasm: bump wasi-libc version to SDK 20
- wasm: remove line of dead code in wasm_exec.js
new targets/boards
- qtpy-esp32c3: add Adafruit QT Py ESP32-C3 board
- mksnanov3: add support for the MKS Robin Nano V3.x
- nrf52840-generic: add generic nrf52840 chip support
- thumby: add support for Thumby
- wasm: add new wasm-unknown target that doesn't depend on WASI or a browser
boards
- arduino-mkrwifi1010, arduino-nano33, nano-rp2040, matrixportal-m4, metro-m4-airlift, pybadge, pyportal: add ninafw build tag and some constants for BLE support
- gopher-badge: fix typo in USB product name
- nano-rp2040: add UART1 and correct mappings for NINA via UART
- pico: bump default stack size from 2kB to 8kB
- wioterminal: expose UART4

0.30.0

general
- add LLVM 16 support, use it by default
compiler
- build: work around a race condition by building Go SSA serially
- compiler: fix a crash by not using the LLVM global context types
- interp: don't copy unknown values in runtime.sliceCopy to fix miscompile
- interp: fix crash in error report by not returning raw LLVM values
standard library
- machine/usb/adc/midi: various improvements and API changes
- reflect: add support for [...]T → []T in reflect
targets
- atsamd21, atsamd51: add support for USB INTERRUPT OUT
- rp2040: always use the USB device enumeration fix, even in chips that supposedly have the HW fix
- wasm: increase default stack size to 32k for wasi/wasm
boards
- gobadge: add GoBadge target as alias for PyBadge :)
- gemma-m0: add support for the Adafruit Gemma M0

0.29.0

general
- Go 1.21 support
- use https for renesas submodule #3856
- ci: rename release-double-zipped to something more useful
- ci: update Node.js from version 14 to version 16
- ci: switch GH actions builds to use Go 1.21 final release
- docker: update clang to version 15
- docker: use Go 1.21 for Docker dev container build
- main: add target JSON file in tinygo info output
- main: improve detection of filesystems
- main: use go env instead of doing all detection manually
- make: add make task to generate Renesas device wrappers
- make: add task to check NodeJS version before running tests
- add submodule for Renesas SVD file mirror repo
- update to go-serial package v1.6.0
- testing: add Testing function
- tools/gen-device-svd: small changes needed for Renesas MCUs
compiler
- builder: update message for max supported Go version
- compiler,reflect: NumMethods reports exported methods only
- compiler: add compiler-rt and wasm symbols to table
- compiler: add compiler-rt to wasm.json
- compiler: add min and max builtin support
- compiler: implement clear builtin for maps
- compiler: implement clear builtin for slices
- compiler: improve panic message when a runtime call is unavailable
- compiler: update .ll test output
- loader: merge go.env file which is now required starting in Go 1.21 to correctly get required packages
standard library
- os: define ErrNoDeadline
- reflect: Add FieldByNameFunc
- reflect: add SetZero
- reflect: fix iterating over maps with interface{} keys
- reflect: implement Value.Grow
- reflect: remove unecessary heap allocations
- reflect: use .key() instead of a type assert
- sync: add implementation from upstream Go for OnceFunc, OnceValue, and OnceValues
targets
- machine: UART refactor (#3832)
- machine/avr: pin change interrupt
- machine/macropad_rp2040: add machine.BUTTON
- machine/nrf: add I2C timeout
- machine/nrf: wait for stop condition after reading from the I2C bus
- machine/nRF52: set SPI TX/RX lengths even data is empty. Fixes #3868 (#3877)
- machine/rp2040: add missing suffix to CMD_READ_STATUS
- machine/rp2040: add NoPin support
- machine/rp2040: move flash related functions into separate file from C imports for correct - LSP. Fixes #3852
- machine/rp2040: wait for 1000 us after flash reset to avoid issues with busy USB bus
- machine/samd51,rp2040,nrf528xx,stm32: implement watchdog
- machine/samd51: fix i2cTimeout was decreasing due to cache activation
- machine/usb: Add support for HID Keyboard LEDs
- machine/usb: allow USB Endpoint settings to be changed externally
- machine/usb: refactor endpoint configuration
- machine/usb: remove usbDescriptorConfig
- machine/usb/hid,joystick: fix hidreport (3) (#3802)
- machine/usb/hid: add RxHandler interface
- machine/usb/hid: rename Handler() to TxHandler()
- wasi: allow zero inodes when reading directories
- wasm: add support for GOOS=wasip1
- wasm: fix functions exported through //export
- wasm: remove i64 workaround, use BigInt instead
- example: adjust time offset
- example: simplify pininterrupt
boards
- targets: add AKIZUKI DENSHI AE-RP2040
- targets: adding new uf2 target for PCA10056 (#3765)

0.28.0

general
- fix parallelism in the compiler on Windows by building LLVM with thread support
- support qemu-user debugging
- make target JSON msd-volume-name an array
- print source location when a panic happens in -monitor
- test: don't print ok for a successful compile-only
compiler
- builder: remove non-ThinLTO build mode
- builder: fail earlier if Go is not available
- builder: improve -size=full in a number of ways
- builder: implement Nordic DFU file writer in Go
- cgo: allow LDFLAGS: --export=...
- compiler: support recursive slice types
- compiler: zero struct padding during map operations
- compiler: add llvm.ident metadata
- compiler: remove unsafe.Pointer(uintptr(v) + idx) optimization (use unsafe.Add instead)
- compiler: add debug info to //go:embed data structures for better -size output
- compiler: add debug info to string constants
- compiler: fix a minor race condition
- compiler: emit correct alignment in debug info for global variables
- compiler: correctly generate reflect data for local named types
- compiler: add alloc attributes to runtime.alloc, reducing flash usage slightly
- compiler: for interface maps, use the original named type if available
- compiler: implement most math/bits functions as LLVM intrinsics
- compiler: ensure all defers have been seen before creating rundefers
standard library
- internal/task: disallow blocking inside an interrupt
- machine: add CPUReset
- machine/usb/hid: add MediaKey support
- machine/usb/hid/joystick: move joystick under HID
- machine/usb/hid/joystick: allow joystick settings override
- machine/usb/hid/joystick: handle case where we cannot find the correct HID descriptor
- machine/usb/hid/mouse: add support for mouse back and forward
- machine/usb: add ability to override default VID, PID, manufacturer name, and product name
- net: added missing TCPAddr and UDPAddr implementations
- os: add IsTimeout function
- os: fix resource leak in (*File).Close
- os: add (*File).Sync
- os: implement (*File).ReadDir for wasi
- os: implement (*File).WriteAt
- reflect: make sure null bytes are supported in tags
- reflect: refactor this package to enable many new features
- reflect: add map type methods: Elem and Key
- reflect: add map methods: MapIndex, MapRange/MapIter, SetMapIndex, MakeMap, MapKeys
- reflect: add slice methods: Append, MakeSlice, Slice, Slice3, Copy, Bytes, SetLen
- reflect: add misc methods: Zero, Addr, UnsafeAddr, OverflowFloat, OverflowInt, OverflowUint, SetBytes, Convert, CanInt, CanFloat, CanComplex, Comparable
- reflect: add type methods: String, PkgPath, FieldByName, FieldByIndex, NumMethod
- reflect: add stubs for Type.Method, CanConvert, ArrayOf, StructOf, MapOf
- reflect: add stubs for channel select routines/types
- reflect: allow nil rawType to call Kind()
- reflect: ensure all ValueError panics have Kind fields
- reflect: add support for named types
- reflect: improve Value.String()
- reflect: set Index and PkgPath field in Type.Field
- reflect: Type.AssignableTo: you can assign anything to interface{}
- reflect: add type check to Value.Field
- reflect: let TypeOf(nil) return nil
- reflect: move StructField.Anonymous field to match upstream location
- reflect: add UnsafePointer for Func types
- reflect: MapIter.Next needs to allocate new keys/values every time
- reflect: fix IsNil for interfaces
- reflect: fix Type.Name to return an empty string for non-named types
- reflect: add VisibleFields
- reflect: properly handle embedded structs
- reflect: make sure PointerTo works for named types
- reflect: Set: convert non-interface to interface
- reflect: Set: fix direction of assignment check
- reflect: support channel directions
- reflect: print struct tags in Type.String()
- reflect: properly handle read-only values
- runtime: allow custom-gc SetFinalizer and clarify KeepAlive
- runtime: implement KeepAlive using inline assembly
- runtime: check for heap allocations inside interrupts
- runtime: properly turn pointer into empty interface when hashing
- runtime: improve map size hint usage
- runtime: zero map key/value on deletion to so GC doesn't see them
- runtime: print the address where a panic happened
- runtime/debug: stub SetGCPercent, BuildInfo.Settings
- runtime/metrics: add this package as a stub
- syscall: Stat_t timespec fields are Atimespec on darwin
- syscall: add Timespec.Unix() for wasi
- syscall: add fsync using libc
- testing: support -test.count
- testing: make test output unbuffered when verbose
- testing: add -test.skip
- testing: move runtime.GC() call to runN to match upstream
- testing: add -test.shuffle to order randomize test and benchmark order
targets
- arm64: fix register save/restore to include vector registers
- attiny1616: add support for this chip
- cortexm: refactor EnableInterrupts and DisableInterrupts to avoid arm.AsmFull
- cortexm: enable functions in RAM for go & cgo
- cortexm: convert SystemStack from AsmFull to C inline assembly
- cortexm: fix crash due to wrong stack size offset
- nrf: samd21, stm32: add flash API
- nrf: fix memory issue in ADC read
- nrf: new peripheral type for nrf528xx chips
- nrf: implement target mode
- nrf: improve ADC and add oversampling, longer sample time, and reference voltage
- rp2040: change calling order for device enumeration fix to do first
- rp2040: rtc delayed interrupt
- rp2040: provide better errors for invalid pins on I2C and SPI
- rp2040: change uart to allow for a single pin
- rp2040: implement Flash interface
- rp2040: remove SPI DataBits property
- rp2040: unify all linker scripts using LDFLAGS
- rp2040: remove SPI deadline for improved performance
- rp2040: use 4MHz as default frequency for SPI
- rp2040: implement target mode
- rp2040: use DMA for send-only SPI transfers
- samd21: rearrange switch case for get pin cfg
- samd21: fix issue with WS2812 driver by making pin accesses faster
- samd51: enable CMCC cache for greatly improved performance
- samd51: remove extra BK0RDY clear
- samd51: implement Flash interface
- samd51: use correct SPI frequency
- samd51: remove extra BK0RDY clear
- samd51: fix ADC multisampling
- wasi: allow users to set the runtime_memhash_tsip or runtime_memhash_fnv build tags
- wasi: set WASMTIME_BACKTRACE_DETAILS when running in wasmtime.
- wasm: implement the //go:wasmimport directive
boards
- gameboy-advance: switch to use register definitions in device/gba
- gameboy-advance: rename display and make pointer receivers
- gopher-badge: Added Gopher Badge support
- lorae5: add needed definition for UART2
- lorae5: correct mapping for I2C bus, add pin mapping to enable power
- pinetime: update the target file (rename from pinetime-devkit0)
- qtpy: fix bad pin assignment
- wioterminal: fix pin definition of BCM13
- xiao: Pins D4 & D5 are I2C1. Use pins D2 & D3 for I2C0.
- xiao: add DefaultUART

0.27.0

general
- all: update musl
- all: remove "acm:"` prefix for USB vid/pid pair
- all: add support for LLVM 15
- all: use DWARF version 4
- all: add initial (incomplete) support for Go 1.20
- all: add -gc=custom option
- main: print ldflags including ThinLTO flags with -x
- main: fix error message when a serial port can't be accessed
- main: add -timeout flag to allow setting how long TinyGo will try looking for a MSD volume for flashing
- test: print PASS on pass when running standalone test binaries
- test: fix printing of benchmark output
- test: print package name when compilation failed (not just when the test failed)
compiler
- refactor to support LLVM 15
- builder: print compiler commands while building a library
- compiler: fix stack overflow when creating recursive pointer types (fix for LLVM 15+ only)
- compiler: allow map keys and values of ≥256 bytes
- cgo: add support for C.float and C.double
- cgo: support anonymous enums included in multiple Go files
- cgo: add support for bitwise operators
- interp: add support for constant icmp instructions
- transform: fix memory corruption issues
standard library
- machine/usb: remove allocs in USB ISR
- machine/usb: add Port() and deprecate New() to have the API better match the singleton that is actually being returned
- machine/usb: change HID usage-maximum to 0xFF
- machine/usb: add USB HID joystick support
- machine/usb: change to not send before endpoint initialization
- net: implement Pipe
- os: add stub for os.Chtimes
- reflect: stub out Type.FieldByIndex
- reflect: add Value.IsZero method
- reflect: fix bug in .Field method when the field fits in a pointer but the parent doesn't
- runtime: switch some panic() calls in the gc to runtimePanic() for consistency
- runtime: add xorshift-based fastrand64
- runtime: fix alignment for arm64, arm, xtensa, riscv
- runtime: implement precise GC
- runtime/debug: stub PrintStack
- sync: implement simple pooling in sync.Pool
- syscall: stubbed Setuid, Exec and friends
- syscall: add more stubs as needed for Go 1.20 support
- testing: implement t.Setenv
- unsafe: add support for Go 1.20 slice/string functions
targets
- all: do not set stack size per board
- all: update picolibc to v1.7.9
- atsame5x: fix CAN extendedID handling
- atsame5x: reduce heap allocation
- avr: drop GNU toolchain dependency
- avr: fix .data initialization for binaries over 64kB
- avr: support ThinLTO
- baremetal: implements calloc
- darwin: fix syscall.Open on darwin/arm64
- darwin: fix error with tinygo lldb
- esp: use LLVM Xtensa linker instead of Espressif toolchain
- esp: use ThinLTO for Xtensa
- esp32c3: add SPI support
- linux: include musl getpagesize function in release
- nrf51: add ADC implementation
- nrf52840: add PDM support
- riscv: add "target-abi" metadata flag
- rp2040: remove mem allocation in GPIO ISR
- rp2040: avoid allocating clock on heap
- rp2040: add basic GPIO support for PIO
- rp2040: fix USB interrupt issue
- rp2040: fix RP2040-E5 USB errata
- stm32: always set ADC pins to pullups floating
- stm32f1, stm32f4: fix ADC by clearing the correct bit for rank after each read
- stm32wl: Fix incomplete RNG initialisation
- stm32wlx: change order for init so clock speeds are set before peripheral start
- wasi: makes wasmtime "run" explicit
- wasm: fix GC scanning of allocas
- wasm: allow custom malloc implementation
- wasm: remove -wasm-abi= flag (use -target instead)
- wasm: fix scanning of the stack
- wasm: fix panic when allocating 0 bytes using malloc
- wasm: always run wasm-opt even with -scheduler=none
- wasm: avoid miscompile with ThinLTO
- wasm: allow the emulator to expand {tmpDir}
- wasm: support ThinLTO
- windows: update mingw-w64 version to avoid linker warning
- windows: add ARM64 support
boards
- Add Waveshare RP2040 Zero
- Add Arduino Leonardo support
- Add Adafruit KB2040
- Add Adafruit Feather M0 Express
- Add Makerfabs ESP32C3SPI35 TFT Touchscreen board
- Add Espressif ESP32-C3-DevKit-RUST-1 board
- lgt92: fix OpenOCD configuration
- xiao-rp2040: fix D9 and D10 constants
- xiao-rp2040: add pin definitions

0.26.0

general
- remove support for LLVM 13
- remove calls to deprecated ioutil package
- move from os.IsFoo to errors.Is(err, ErrFoo)
- fix for builds using an Android host
- make interp timeout configurable from command line
- ignore ports with VID/PID if there is no candidates
- drop support for Go 1.16 and Go 1.17
- update serial package to v1.3.5 for latest bugfixes
- remove GOARM from tinygo info
- add flag for setting the goroutine stack size
- add serial port monitoring functionality
compiler
- cgo: implement support for static functions
- cgo: fix panic when FuncType.Results is nil
- compiler: add aliases for edwards25519/field.feMul and field.feSquare
- compiler: fix incorrect DWARF type in some generic parameters
- compiler: use LLVM math builtins everywhere
- compiler: replace some math operation bodies with LLVM intrinsics
- compiler: replace math aliases with intrinsics
- compiler: fix unsafe.Sizeof for chan and map values
- compileopts: use tags parser from buildutil
- compileopts: use backticks for regexp to avoid extra escapes
- compileopts: fail fast on duplicate values in target field slices
- compileopts: fix windows/arm target triple
- compileopts: improve error handling when loading target/*.json
- compileopts: add support for stlink-dap programmer
- compileopts: do not complain about -no-debug on MacOS
- goenv: support GOOS=android
- interp: fix reading from external global
- loader: fix link error for crypto/internal/boring/sig.StandardCrypto
standard library
- rename assembly files to .S extension
- machine: add PWM peripheral comments to pins
- machine: improve UARTParity slightly
- machine: do not export DFU_MAGIC_* constants on nrf52840
- machine: rename PinInputPullUp/PinInputPullDown
- machine: add KHz, MHz, GHz constants, deprecate TWI_FREQ_* constants
- machine: remove level triggered pin interrupts
- machine: do not expose RESET_MAGIC_VALUE
- machine: use NoPin constant where appropriate (instead of 0 for example)
- net: sync net.go with Go 1.18 stdlib
- os: add SyscallError.Timeout
- os: add ErrProcessDone error
- reflect: implement CanInterface and fix string Index
- runtime: make MemStats available to leaking collector
- runtime: add MemStats.TotalAlloc
- runtime: add MemStats.Mallocs and Frees
- runtime: add support for time.NewTimer and time.NewTicker
- runtime: implement resetTimer
- runtime: ensure some headroom for the GC to run
- runtime: make gc and scheduler asserts settable with build tags
- runtime/pprof: add WriteHeapProfile
- runtime/pprof: runtime/trace: stub some additional functions
- sync: implement Map.LoadAndDelete
- syscall: group WASI consts by purpose
- syscall: add WASI {D,R}SYNC, NONBLOCK FD flags
- syscall: add ENOTCONN on darwin
- testing: add support for -benchmem
targets
- remove USB vid/pid pair of bootloader
- esp32c3: remove unused UARTStopBits constants
- nrf: implement GetRNG function
- nrf: rp2040: add machine.ReadTemperature
- nrf52: cleanup s140v6 and s140v7 uf2 targets
- rp2040: implement semi-random RNG based on ROSC based on pico-sdk
- wasm: add summary of wasm examples and fix callback bug
- wasm: do not allow undefined symbols (--allow-undefined)
- wasm: make sure buffers returned by malloc are kept until free is called
- windows: save and restore xmm registers when switching goroutines
boards
- add Pimoroni's Tufty2040
- add XIAO ESP32C3
- add Adafruit QT2040
- add Adafruit QT Py RP2040
- esp32c3-12f: matrixportal-m4: p1am-100: remove duplicate build tags
- hifive1-qemu: remove this emulated board
- wioterminal: add UART3 for RTL8720DN
- xiao-ble: fix usbpid

0.25.0

command line
- change to ignore PortReset failures
compiler
- compiler: darwin/arm64 is aarch64, not arm
- compiler: don't clobber X18 and FP registers on darwin/arm64
- compiler: fix issue with methods on generic structs
- compiler: do not try to build generic functions
- compiler: fix type names for generic named structs
- compiler: fix multiple defined function issue for generic functions
- compiler: implement unsafe.Alignof and unsafe.Sizeof for generic code
standard library
- machine: add DTR and RTS to Serialer interface
- machine: reorder pin definitions to improve pin list on tinygo.org
- machine/usb: add support for MIDI
- machine/usb: adjust buffer alignment (samd21, samd51, nrf52840)
- machine/usb/midi: add NoteOn, NoteOff, and SendCC methods
- machine/usb/midi: add definition of MIDI note number
- runtime: add benchmarks for memhash
- runtime: add support for printing slices via print/println
targets
- avr: fix some apparent mistake in atmega1280/atmega2560 pin constants
- esp32: provide hardware pin constants
- esp32: fix WDT reset on the MCH2022 badge
- esp32: optimize SPI transmit
- esp32c3: provide hardware pin constants
- esp8266: provide hardware pin constants like GPIO2
- nrf51: define and use P0_xx constants
- nrf52840, samd21, samd51: unify bootloader entry process
- nrf52840, samd21, samd51: change usbSetup and sendZlp to public
- nrf52840, samd21, samd51: refactor handleStandardSetup and initEndpoint
- nrf52840, samd21, samd51: improve usb-device initialization
- nrf52840, samd21, samd51: move usbcdc to machine/usb/cdc
- rp2040: add usb serial vendor/product ID
- rp2040: add support for usb
- rp2040: change default for serial to usb
- rp2040: add support for machine.EnterBootloader
- rp2040: turn off pullup/down when input type is not specified
- rp2040: make picoprobe default openocd interface
- samd51: add support for DAC1
- samd51: improve TRNG
- wasm: stub runtime.buffered, runtime.getchar
- wasi: make leveldb runtime hash the default
boards
- add Challenger RP2040 LoRa
- add MCH2022 badge
- add XIAO RP2040
- clue: remove pins D21..D28
- feather-rp2040, macropad-rp2040: fix qspi-flash settings
- xiao-ble: add support for flash-1200-bps-reset
- gopherbot, gopherbot2: add these aliases to simplify for newer users

0.24.0

command line
- remove support for go 1.15
- remove support for LLVM 11 and LLVM 12
- add initial Go 1.19 beta support
- test: fix package/... syntax
compiler
- add support for the embed package
- builder: improve error message for "command not found"
- builder: add support for ThinLTO on MacOS and Windows
- builder: free LLVM objects after use, to reduce memory leaking
- builder: improve -no-debug error messages
- cgo: be more strict: CGo now requires every Go file to import the headers it needs
- compiler: alignof(func) is 1 pointer, not 2
- compiler: add support for type parameters (aka generics)
- compiler: implement recover() built-in function
- compiler: support atomic, volatile, and LLVM memcpy-like functions in defer
- compiler: drop support for macos syscalls via inline assembly
- interp: do not try to interpret past task.Pause()
- interp: fix some buggy localValue handling
- interp: do not unroll loops
- transform: fix MakeGCStackSlots that caused a possible GC bug on WebAssembly
standard library
- os: enable os.Stdin for baremetal target
- reflect: add Value.UnsafePointer method
- runtime: scan GC globals conservatively on Windows, MacOS, Linux and Nintendo Switch
- runtime: add per-map hash seeds
- runtime: handle nil map write panics
- runtime: add stronger hash functions
- syscall: implement Getpagesize
targets
- atmega2560: support UART1-3 + example for uart
- avr: use compiler-rt for improved float64 support
- avr: simplify timer-based time
- avr: fix race condition in stack write
- darwin: add support for GOARCH=arm64 (aka Apple Silicon)
- darwin: support -size=short and -size=full flag
- rp2040: replace sleep 'busy loop' with timer alarm
- rp2040: align api for PortMaskSet, PortMaskClear
- rp2040: fix GPIO interrupts
- samd21, samd51, nrf52840: add support for USBHID (keyboard / mouse)
- wasm: update wasi-libc version
- wasm: use newer WebAssembly features
boards
- add Badger 2040
- matrixportal-m4: attach USB DP to the correct pin
- teensy40: add I2C support
- wioterminal: fix I2C definition

0.23.0

command line
- add -work flag
- add Go 1.18 support
- add LLVM 14 support
- run: add support for command-line parameters
- build: calculate default output path if -o is not specified
- build: add JSON output
- test: support multiple test binaries with -c
- test: support flags like -v on all targets (including emulated firmware)
compiler
- add support for ThinLTO
- use compiler-rt from LLVM
- builder: prefer GNU build ID over Go build ID for caching
- builder: add support for cross compiling to Darwin
- builder: support machine outlining pass in stacksize calculation
- builder: disable asynchronous unwind tables
- compileopts: fix emulator configuration on non-amd64 Linux architectures
- compiler: move allocations > 256 bytes to the heap
- compiler: fix incorrect unsafe.Alignof on some 32-bit architectures
- compiler: accept alias for slice cap builtin
- compiler: allow slices of empty structs
- compiler: fix difference in aliases in interface methods
- compiler: make RawSyscall an alias for Syscall
- compiler: remove support for memory references in AsmFull
- loader: only add Clang header path for CGo
- transform: fix poison value in heap-to-stack transform
standard library
- internal/fuzz: add this package as a shim
- os: implement readdir for darwin and linux
- os: add DirFS, which is used by many programs to access readdir.
- os: isWine: be compatible with older versions of wine, too
- os: implement RemoveAll
- os: Use a uintptr for NewFile
- os: add stubs for exec.ExitError and ProcessState.ExitCode
- os: export correct values for DevNull for each OS
- os: improve support for Signal by fixing various bugs
- os: implement File.Fd method
- os: implement UserHomeDir
- os: add exec.ProcessState stub
- os: implement Pipe for darwin
- os: define stub ErrDeadlineExceeded
- reflect: add stubs for more missing methods
- reflect: rename reflect.Ptr to reflect.Pointer
- reflect: add Value.FieldByIndexErr stub
- runtime: fix various small GC bugs
- runtime: use memzero for leaking collector instead of manually zeroing objects
- runtime: implement memhash
- runtime: implement fastrand
- runtime: add stub for debug.ReadBuildInfo
- runtime: add stub for NumCPU
- runtime: don't inline runtime.alloc with -gc=leaking
- runtime: add Version
- runtime: add stubs for NumCgoCall and NumGoroutine
- runtime: stub {Lock,Unlock}OSThread on Windows
- runtime: be able to deal with a very small heap
- syscall: make Environ return a copy of the environment
- syscall: implement getpagesize and munmap
- syscall: wasi: define MAP_SHARED and PROT_READ
- syscall: stub mmap(), munmap(), MAP_SHARED, PROT_READ, SIGBUS, etc. on nonhosted targets
- syscall: darwin: more complete list of signals
- syscall: wasi: more complete list of signals
- syscall: stub WaitStatus
- syscall/js: allow copyBytesTo(Go|JS) to use Uint8ClampedArray
- testing: implement TempDir
- testing: nudge type TB closer to upstream; should be a no-op change.
- testing: on baremetal platforms, use simpler test matcher
targets
- atsamd: fix usbcdc initialization when -serial=uart
- atsamd51: allow higher frequency when using SPI
- esp: support CGo
- esp32c3: add support for input pin
- esp32c3: add support for GPIO interrupts
- esp32c3: add support to receive UART data
- rp2040: fix PWM bug at high frequency
- rp2040: fix some minor I2C bugs
- rp2040: fix incorrect inline assembly
- rp2040: fix spurious i2c STOP during write+read transaction
- rp2040: improve ADC support
- wasi: remove --export-dynamic linker flag
- wasm: remove heap allocator from wasi-libc
boards
- circuitplay-bluefruit: move pin mappings so board can be compiled for WASM use in Playground
- esp32-c3-12f: add the ESP32-C3-12f Kit
- m5stamp-c3: add pin setting of UART
- macropad-rp2040: add the Adafruit MacroPad RP2040 board
- nano-33-ble: typo in LPS22HB peripheral definition and documentation (#2579)
- teensy41: add the Teensy 4.1 board
- teensy40: add ADC support
- teensy40: add SPI support
- thingplus-rp2040: add the SparkFun Thing Plus RP2040 board
- wioterminal: add DefaultUART
- wioterminal: verify written data when flashing through OpenOCD
- xiao-ble: add XIAO BLE nRF52840 support

0.22.0

command line
- add asyncify to scheduler flag help
- support -run for tests
- remove FreeBSD target support
- add LLVM 12 and LLVM 13 support, use LLVM 13 by default
- add support for ARM64 MacOS
- improve help
- check /run/media as well as /media on Linux for non-debian-based distros
- test: set cmd.Dir even when running emulators
- info: add JSON output using the -json flag
compiler
- builder: fix off-by-one in size calculation
- builder: handle concurrent library header rename
- builder: use flock to avoid double-compiles
- builder: use build ID as cache key
- builder: add -fno-stack-protector to musl build
- builder: update clang header search path to look in /usr/lib
- builder: explicitly disable unwind tables for ARM
- cgo: add support for C.CString and related functions
- compiler: fix ranging over maps with particular map types
- compiler: add correct debug location to init instructions
- compiler: fix emission of large object layouts
- compiler: work around AVR atomics bugs
- compiler: predeclare runtime.trackPointer
- interp: work around AVR function pointers in globals
- interp: run goroutine starts and checks at runtime
- interp: always run atomic and volatile loads/stores at runtime
- interp: bump timeout to 180 seconds
- interp: handle type assertions on nil interfaces
- loader: eliminate goroot cache inconsistency
- loader: respect $GOROOT when running go list
- transform: allocate the correct amount of bytes in an alloca
- transform: remove switched func lowering
standard library
- crypto/rand: show error if platform has no rng
- device/*: add *_Msk field for each bit field and avoid duplicates
- device/*: provide Set/Get for each register field described in the SVD files
- internal/task: swap stack chain when switching goroutines
- internal/task: remove -scheduler=coroutines
- machine: add Device string constant
- net: add bare Interface implementation
- net: add net.Buffers
- os: stub out support for some features
- os: obey TMPDIR on unix, TMP on Windows, etc
- os: implement ReadAt, Mkdir, Remove, Stat, Lstat, CreateTemp, MkdirAll, Chdir, Chmod, Clearenv, Unsetenv, Setenv, MkdirTemp, Rename, Seek, ExpandEnv, Symlink, Readlink
- os: implement File.Stat
- os: fix IsNotExist on nonexistent path
- os: fix opening files on WASI in read-only mode
- os: work around lack of syscall.seek on 386 and arm
- reflect: make sure indirect pointers are handled correctly
- runtime: allow comparing interfaces
- runtime: use LLVM intrinsic to read the stack pointer
- runtime: strengthen hashmap hash function for structs and arrays
- runtime: fix float/complex hashing
- runtime: fix nil map dereference
- runtime: add realloc implementation to GCs
- runtime: handle negative sleep times
- runtime: correct GC scan bounds
- runtime: remove extalloc GC
- rumtime: implement __sync libcalls as critical sections for most microcontrollers
- runtime: add stubs for Func.FileLine and Frame.PC
- sync: fix concurrent read-lock on write-locked RWMutex
- sync: add a package doc
- sync: add tests
- syscall: add support for Mmap and Mprotect
- syscall: fix array size for mmap slice creation
- syscall: enable Getwd in wasi
- testing: add a stub for CoverMode
- testing: support -bench option to run benchmarks matching the given pattern.
- testing: support b.SetBytes(); implement sub-benchmarks.
- testing: replace spaces with underscores in test/benchmark names, as upstream does
- testing: implement testing.Cleanup
- testing: allow filtering subbenchmarks with the -bench flag
- testing: implement -benchtime flag
- testing: print duration
- testing: allow filtering of subtests using -run
targets
- all: change LLVM features to match vanilla Clang
- avr: use interrupt-based timer which is much more accurate
- nrf: fix races in I2C
- samd51: implement TRNG for randomness
- stm32: pull-up on I2C lines
- stm32: fix timeout for i2c comms
- stm32f4, stm32f103: initial implementation for ADC
- stm32f4, stm32f7, stm32l0x2, stm32l4, stm32l5, stm32wl: TRNG implementation in crypto/rand
- stm32wl: add I2C support
- windows: add support for the -size= flag
- wasm: add support for tinygo test
- wasi, wasm: raise default stack size to 16 KiB
boards
- add M5Stack
- add lorae5 (stm32wle) support
- add Generic Node Sensor Edition
- add STM32F469 Discovery
- add M5Stamp C3
- add Blues Wireless Swan
- bluepill: add definitions for ADC pins
- stm32f4disco: add definitions for ADC pins
- stm32l552ze: use supported stlink interface
- microbit-v2: add some pin definitions

0.21.0

command line
- drop support for LLVM 10
- build: drop support for LLVM targets in the -target flag
- build: fix paths in error messages on Windows
- build: add -p flag to set parallelism
- lldb: implement tinygo lldb subcommand
- test: use emulator exit code instead of parsing test output
- test: pass testing arguments to wasmtime
compiler
- use -opt flag for optimization level in CFlags (-Os, etc)
- builder: improve accuracy of the -size=full flag
- builder: hardcode some more frame sizes for _aeabi* functions
- builder: add support for -size= flag for WebAssembly
- cgo: fix line/column reporting in syntax error messages
- cgo: support function definitions in CGo headers
- cgo: implement rudimentary C array decaying
- cgo: add support for stdio in picolibc and wasi-libc
- cgo: run CGo parser per file, not per CGo fragment
- compiler: fix unintentionally exported math functions
- compiler: properly implement div and rem operations
- compiler: add support for recursive function types
- compiler: add support for the go keyword on interface methods
- compiler: add minsize attribute for -Oz
- compiler: add "target-cpu" and "target-features" attributes
- compiler: fix indices into strings and arrays
- compiler: fix string compare functions
- interp: simplify some code to avoid some errors
- interp: support recursive globals (like linked lists) in globals
- interp: support constant globals
- interp: fix reverting of extractvalue/insertvalue with multiple indices
- transform: work around renamed return type after merging LLVM modules
standard library
- internal/bytealg: fix indexing error in Compare()
- machine: support Pin.Get() function when the pin is configured as output
- net, syscall: Reduce code duplication by switching to internal/itoa.
- os: don't try to read executable path on baremetal
- os: implement Getwd
- os: add File.WriteString and File.WriteAt
- reflect: fix type.Size() to account for struct padding
- reflect: don't construct an interface-in-interface value
- reflect: implement Value.Elem() for interface values
- reflect: fix Value.Index() in a specific case
- reflect: add support for DeepEqual
- runtime: add another set of invalid unicode runes to encodeUTF8()
- runtime: only initialize os.runtime_args when needed
- runtime: only use CRLF on baremetal systems for println
- runtime/debug: stub debug.SetMaxStack
- runtime/debug: stub debug.Stack
- testing: add a stub for t.Parallel()
- testing: add support for -test.short flag
- testing: stub B.ReportAllocs()
- testing: add testing.Verbose
- testing: stub testing.AllocsPerRun
targets
- fix gen-device-svd to handle 64-bit values
- add CPU and Features property to all targets
- match LLVM triple to the one Clang uses
- atsam: simplify definition of SERCOM UART, I2C and SPI peripherals
- atsam: move I2S0 to machine file
- esp32: fix SPI configuration
- esp32c3: add support for GDB debugging
- esp32c3: add support for CPU interrupts
- esp32c3: use tasks scheduler by default
- fe310: increase CPU frequency from 16MHz to 320MHz
- fe310: add support for bit banging drivers
- linux: build static binaries using musl
- linux: reduce binary size by calling write instead of putchar
- linux: add support for GOARM
- riscv: implement 32-bit atomic operations
- riscv: align the heap to 16 bytes
- riscv: switch to tasks-based scheduler
- rp2040: add CPUFrequency()
- rp2040: improve I2C baud rate configuration
- rp2040: add pin interrupt API
- rp2040: refactor PWM code and fix Period calculation
- stm32f103: fix SPI
- stm32f103: make SPI frequency selection more flexible
- qemu: signal correct exit code to QEMU
- wasi: run C/C++ constructors at startup
- wasm: ensure heapptr is aligned
- wasm: update wasi-libc dependency
- wasm: wasi: use asyncify
- wasm: support -scheduler=none
- windows: add support for Windows (amd64 only for now)
boards
- feather-stm32f405, feather-rp2040: add I2C pin names
- m5stack-core2: add M5Stack Core2
- nano-33-ble: SoftDevice s140v7 support
- nano-33-ble: add constants for more on-board pins

0.20.0

command line
- add support for Go 1.17
- improve Go version detection
- add support for the Black Magic Probe (BMP)
- add a flag for creating cpu profiles
compiler
- builder: list libraries at the end of the linker command
- builder: strip debug information at link time instead of at compile time
- builder: add missing error check for ioutil.TempFile()
- builder: simplify running of jobs
- compiler: move LLVM math builtin support into the compiler
- compiler: move math aliases from the runtime to the compiler
- compiler: add aliases for many hashing packages
- compiler: add *ssa.MakeSlice bounds tests
- compiler: fix max possible slice
- compiler: add support for new language features of Go 1.17
- compiler: fix equally named structs in different scopes
- compiler: avoid zero-sized alloca in channel operations
- interp: don't ignore array indices for untyped objects
- interp: keep reverted package initializers in order
- interp: fix bug in compiler-time/run-time package initializers
- loader: fix panic in CGo files with syntax errors
- transform: improve GC stack slot pass to work around a bug
standard library
- crypto/rand: switch to arc4random_buf
- math: fix math.Max and math.Min
- math/big: fix undefined symbols error
- net: add MAC address implementation
- os: implement os.Executable
- os: add SEEK_SET, SEEK_CUR, and SEEK_END
- reflect: add StructField.IsExported method
- runtime: reset heapptr to heapStart after preinit()
- runtime: add subsections_via_symbols to assembly files on darwin
- testing: add subset implementation of Benchmark
- testing: test testing package using tinygo test
- testing: add support for the -test.v flag
targets
- 386: bump minimum requirement to the Pentium 4
- arm: switch to Thumb instruction set on ARM
- atsamd: fix copy-paste error for atsamd21/51 calibTrim block
- baremetal,wasm: support command line params and environment variables
- cortexm: fix stack overflow because of unaligned stacks
- esp32c3: add support for the ESP32-C3 from Espressif
- nrf52840: fix ram size
- nxpmk66f18: fix a suspicious bitwise operation
- rp2040: add SPI support
- rp2040: add I2C support
- rp2040: add PWM implementation
- rp2040: add openocd configuration
- stm32: add support for PortMask* functions for WS2812 support
- unix: fix time base for time.Now()
- unix: check for mmap error and act accordingly
- wasm: override dlmalloc heap implementation from wasi-libc
- wasm: align heap to 16 bytes
- wasm: add support for the crypto/rand package
boards
- add DefaultUART to adafruit boards
- arduino-mkrwifi1010: add board definition for Arduino MKR WiFi 1010
- arduino-mkrwifi1010: fix pin definition of NINA_RESETN
- feather-nrf52: fix pin definition of uart
- feather-rp2040: add pin name definition
- gameboy-advance: fix ROM header
- mdbt50qrx-uf2: add Raytac MDBT50Q-RX Dongle with TinyUF2
- nano-rp2040: define NINA_SPI and fix wifinina pins
- teensy40: enable hardware UART reconfiguration, fix receive watermark interrupt

0.19.0

command line
- don't consider compile-only tests as failing
- add -test flag for tinygo list
- escape commands while printing them with the -x flag
- make flash-command portable and safer to use
- use extended-remote instead of remote in GDB
- detect specific serial port IDs based on USB vid/pid
- add a flag to the command line to select the serial implementation
compiler
- cgo: improve constant parser
- compiler: support chained interrupt handlers
- compiler: add support for running a builtin in a goroutine
- compiler: do not emit nil checks for loading closure variables
- compiler: skip context parameter when starting regular goroutine
- compiler: refactor method names
- compiler: add function and global section pragmas
- compiler: implement syscall.rawSyscallNoError in inline assembly
- interp: ignore inline assembly in markExternal
- interp: fix a bug in pointer cast workaround
- loader: fix testing a main package
standard library
- crypto/rand: replace this package with a TinyGo version
- machine: make USBCDC global a pointer
- machine: make UART objects pointer receivers
- machine: define Serial as the default output
- net: add initial support for net.IP
- net: add more net compatibility
- os: add stub for os.ReadDir
- os: add FileMode constants from Go 1.16
- os: add stubs required for net/http
- os: implement process related functions
- reflect: implement AppendSlice
- reflect: add stubs required for net/http
- runtime: make task.Data a 64-bit integer to avoid overflow
- runtime: expose memory stats
- sync: implement NewCond
- syscall: fix int type in libc version
targets
- cortexm: do not disable interrupts on abort
- cortexm: bump default stack size to 2048 bytes
- nrf: avoid heap allocation in waitForEvent
- nrf: don't trigger a heap allocation in SPI.Transfer
- nrf52840: add support for flashing with the BOSSA tool
- rp2040: add support for GPIO input
- rp2040: add basic support for ADC
- rp2040: gpio and adc pin definitions
- rp2040: implement UART
- rp2040: patch elf to checksum 2nd stage boot
- stm32: add PWM for most chips
- stm32: add support for pin interrupts
- stm32f103: add support for PinInputPullup / PinInputPulldown
- wasi: remove wasm build tag
boards
- feather-rp2040: add support for this board
- feather-nrf52840-sense: add board definition for this board
- pca10059: support flashing from Windows
- nano-rp2040: add this board
- nano-33-ble: add support for this board
- pico: add the Raspberry Pi Pico board with the new RP2040 chip
- qtpy: add pin for neopixels
- all: add definition for ws2812 for supported boards

0.18.0

command line
- drop support for Go 1.11 and 1.12
- throw an error when no target is specified on Windows
- improve error messages in getDefaultPort(), support for multiple ports
- remove -cflags and -ldflags flags
- implement -ldflags="-X ..."
- add -print-allocs flag that lets you print all heap allocations
- openocd commands in tinygo command line
- add -llvm-features parameter
- match go test output
- discover USB ports only, this will ignore f.ex. bluetooth
- use physicmal path instead of cached GOROOT in function getGoroot
- add goroot for snap installs
compiler
- builder: add support for -opt=0
- builder, compiler: compile and cache packages in parallel
- builder: run interp per package
- builder: cache C and assembly file outputs
- builder: add support for -x flag to print commands
- builder: add optsize attribute while building the package
- builder: run function passes per package
- builder: hard code Clang compiler
- compiler: do not use llvm.GlobalContext()
- compiler: remove SimpleDCE pass
- compiler: do not emit nil checks for *ssa.Alloc instructions
- compiler: merge runtime.typecodeID and runtime.typeInInterface
- compiler: do not check for impossible type asserts
- compiler: fix use of global context: llvm.Int32Type()
- compiler: add interface IR test
- compiler: fix lack of method name in interface matching
- compiler: fix "fragment covers entire variable" bug
- compiler: optimize string literals and globals
- compiler: decouple func lowering from interface type codes
- compiler: add function attributes to some runtime calls
- compiler: improve position information in error messages
- cgo: add support for CFLAGS in .c files
- interp: support GEP on fixed (MMIO) addresses
- interp: handle (reflect.Type).Elem()
- interp: add support for runtime.interfaceMethod
- interp: make toLLVMValue return an error instead of panicking
- interp: add support for switch statement
- interp: fix phi instruction
- interp: remove map support
- interp: support extractvalue/insertvalue with multiple operands
- transform: optimize string comparisons against ""
- transform: optimize reflect.Type Implements() method
- transform: fix bug in interface lowering when signatures are renamed
- transform: don't rely on struct name of runtime.typecodeID
- transform: use IPSCCP pass instead of the constant propagation pass
- transform: fix func lowering assertion failure
- transform: do not lower zero-sized alloc to alloca
- transform: split interface and reflect lowering
standard library
- runtime: add dummy debug package
- machine: fix data shift/mask in newUSBSetup
- machine: make machine.I2C0 and similar objects pointers
- machine: unify usbcdc code
- machine: refactor PWM support
- machine: avoid heap allocations in USB code
- reflect: let reflect.Type be of interface type
- reflect: implement a number of stub functions
- reflect: check for access in the Interface method call
- reflect: fix AssignableTo and Implements methods
- reflect: implement Value.CanAddr
- reflect: implement Sizeof and Alignof for func values
- reflect: implement New function
- runtime: implement command line arguments in hosted environments
- runtime: implement environment variables for Linux
- runtime: improve timers on nrf, and samd chips
targets
- all: use -Qunused-arguments only for assembly files
- atmega1280: add PWM support
- attiny: remove dummy UART
- atsamd21: improve SPI
- atsamd51: fix PWM support in atsamd51p20
- atsamd5x: improve SPI
- atsamd51, atsame5x: unify samd51 and same5x
- atsamd51, atsamd21: fix ADC.Get() value at 8bit and 10bit
- atsame5x: add support for CAN
- avr: remove I2C stubs from attiny support
- cortexm: check for arm-none-eabi-gdb and gdb-multiarch commands
- cortexm: add __isr_vector symbol
- cortexm: disable FPU on Cortex-M4
- cortexm: clean up Cortex-M target files
- fe310: fix SPI read
- gameboy-advance: Fix RGBA color interpretation
- nrf52833: add PWM support
- stm32l0: use unified UART logic
- stm32: move f103 (bluepill) to common i2c code
- stm32: separate altfunc selection for UART Tx/Rx
- stm32: i2c implementation for F7, L5 and L4 MCUs
- stm32: make SPI CLK fast to fix data issue
- stm32: support SPI on L4 series
- unix: avoid possible heap allocation with -opt=0
- unix: use conservative GC by default
- unix: use the tasks scheduler instead of coroutines
- wasi: upgrade WASI version to wasi_snapshot_preview1
- wasi: darwin: support basic file io based on libc
- wasm: only export explicitly exported functions
- wasm: use WASI ABI for exit function
- wasm: scan globals conservatively
boards
- arduino-mega1280: add support for the Arduino Mega 1280
- arduino-nano-new: Add Arduino Nano w/ New Bootloader target
- atsame54-xpro: add initial support this board
- feather-m4-can: add initial support for this board
- grandcentral-m4: add board support for Adafruit Grand Central M4 (SAMD51)
- lgt92: update to new UART structure
- microbit: remove LED constant
- microbit-v2: add support for S113 SoftDevice
- nucleol432: add support for this board
- nucleo-l031k6: add this board
- pca10059: initial support for this board
- qtpy: fix msd-volume-name
- qtpy: fix i2c setting
- teensy40: move txBuffer allocation to UART declaration
- teensy40: add UART0 as alias for UART1

0.17.0

command line
- switch to LLVM 11 for static builds
- support gdb debugging with AVR
- add support for additional openocd commands
- add -x flag to print commands
- use LLVM 11 by default when linking LLVM dynamically
- update go-llvm to use LLVM 11 on macOS
- bump go.bug.st/serial to version 1.1.2
- do not build LLVM with libxml to work around a bugo on macOS
- add support for Go 1.16
- support gdb daemonization on Windows
- remove support for LLVM 9, to fix CI
- kill OpenOCD if it does not exit with a regular quit signal
- support -ocd-output on Windows
compiler
- builder: parallelize most of the build
- builder: remove unused cacheKey parameter
- builder: add -mcpu flag while building libraries
- builder: wait for running jobs to finish
- cgo: add support for variadic functions
- compiler: fix undefined behavior in wordpack
- compiler: fix incorrect "exported function" panic
- compiler: fix non-int integer constants (fixing a crash)
- compiler: refactor and add tests
- compiler: emit a nil check when slicing an array pointer
- compiler: saturate float-to-int conversions
- compiler: test float to int conversions and fix upper-bound calculation
- compiler: support all kinds of deferred builtins
- compiler: remove ir package
- compiler: remove unnecessary main.main call workaround
- compiler: move the setting of attributes to getFunction
- compiler: create runtime types lazily when needed
- compiler: move settings to a separate Config struct
- compiler: work around an ARM backend bug in LLVM
- interp: rewrite entire package
- interp: fix alignment of untyped globals
- loader: use name "main" for the main package
- loader: support imports from vendor directories
- stacksize: add support for DW_CFA_offset_extended
- transform: show better error message in coroutines lowering
standard library
- machine: accept configuration struct for ADC parameters
- machine: make I2C.Configure signature consistent
- reflect: implement PtrTo
- runtime: refactor to simplify stack switching
- runtime: put metadata at the top end of the heap
targets
- atsam: add a length check to findPinPadMapping
- atsam: improve USBCDC
- atsam: avoid infinite loop when USBCDC is disconnected
- avr: add SPI support for Atmega based chips
- avr: use Clang for compiling C and assembly files
- esp32: implement task based scheduler
- esp32: enable the FPU
- esp8266: implement task based scheduler
- esp: add compiler-rt library
- esp: add picolibc
- nrf: refactor code a bit to reduce duplication
- nrf: use SPIM peripheral instead of the legacy SPI peripheral
- nrf: update nrfx submodule to latest commit
- nrf52840: ensure that USB CDC interface is only initialized once
- nrf52840: improve USBCDC
- stm32: use stm32-rs SVDs which are of much higher quality
- stm32: harmonization of UART logic
- stm32: replace I2C addressable interface with simpler type
- stm32: fix i2c and add stm32f407 i2c
- stm32: revert change that adds support for channels in interrupts
- wasm: implement a growable heap
- wasm: fix typo in wasm_exec.js, syscall/js.valueLoadString()
- wasm: Namespaced Wasm Imports so they don't conflict across modules, or reserved LLVM IR
- wasi: support env variables based on libc
- wasi: specify wasi-libc in a different way, to improve error message
boards
- matrixportal-m4: add support for board Adafruit Matrix Portal M4
- mkr1000: add this board
- nucleo-f722ze: add this board
- clue: correct volume name and add alias for release version of Adafruit Clue board
- p1am-100: add support for the P1AM-100 (similar to Arduino MKR)
- microbit-v2: add initial support based on work done by @alankrantas thank you!
- lgt92: support for STM32L0 MCUs and Dragino LGT92 device
- nicenano: nice!nano board support
- circuitplay-bluefruit: correct internal I2C pin mapping
- clue: correct for lack of low frequency crystal
- digispark: split off attiny85 target
- nucleo-l552ze: implementation with CLOCK, LED, and UART
- nrf52840-mdk-usb-dongle: add this board

0.16.0

command-line
- add initial support for LLVM 11
- make lib64 clang include path check more robust
- build: improve support for GOARCH=386 and add tests
- gdb: add support for qemu-user targets
- test: support non-host tests
- test: add support for -c and -o flags
- test: implement some benchmark stubs
compiler
- builder: improve detection of clang on Fedora
- compiler: fix floating point comparison bugs
- compiler: implement negate for complex numbers
- loader: fix linkname in test binaries
- transform: add missing return pointer restore for regular coroutine tail calls
standard library
- machine: switch default frequency to 4MHz
- machine: clarify caller's responsibility in SetInterrupt
- os: add LookupEnv() stub
- reflect: implement Swapper
- runtime: fix UTF-8 decoding
- runtime: gc: use raw stack access whenever possible
- runtime: use dedicated printfloat32
- runtime: allow ranging over a nil map
- runtime: avoid device/nxp dependency in HardFault handler
- testing: implement dummy Helper method
- testing: add Run method
targets
- arm64: add support for SVCall intrinsic
- atsamd51: avoid panic when configuring SPI with SDI=NoPin
- avr: properly support the .rodata section
- esp8266: implement Pin.Get function
- nintendoswitch: fix crash when printing long lines (> 120)
- nintendoswitch: add env parser and removed unused stuff
- nrf: add I2C error checking
- nrf: give more flexibility in picking SPI speeds
- nrf: fix nrf52832 flash size
- stm32f103: support wakeups from interrupts
- stm32f405: add SPI support
- stm32f405: add I2C support
- wasi: add support for this target
- wasi: use 'generic' ABI by default
- wasi: remove --no-threads flag from wasm-ld
- wasm: add instanceof support for WebAssembly
- wasm: use fixed length buffer for putchar
boards
- d1mini: add this ESP8266 based board
- esp32: use board definitions instead of chip names
- qtpy: add board definition for Adafruit QTPy
- teensy40: add this board

0.15.0

command-line
- add cached GOROOT to info subcommand
- embed git-hash in tinygo-dev executable
- implement tinygo targets to list usable targets
- use simpler file copy instead of file renaming to avoid issues on nrf52840 UF2 bootloaders
- use ToSlash() to specify program path
- support flashing esp32/esp8266 directly from tinygo
- when flashing call PortReset only on other than openocd
compiler
- compileopts: add support for custom binary formats
- compiler: improve display of goroutine wrappers
- interp: don't panic in the Store method
- interp: replace some panics with error messages
- interp: show error line in first line of the traceback
- loader: be more robust when creating the cached GOROOT
- loader: rewrite/refactor much of the code to use go list directly
- loader: use ioutil.TempDir to create a temporary directory
- stacksize: deal with DW_CFA_advance_loc1
standard library
- runtime: use waitForEvents when appropriate
wasm
- wasm: Remove --no-threads from wasm-ld calls.
- wasm: update wasi-libc dependency
targets
- arduino-mega2560: fix flashing on Windows
- arm: automatically determine stack sizes
- arm64: make dynamic loader structs and constants private
- avr: configure emulator in board files
- cortexm: fix stack size calculation with interrupts
- flash: add openocd settings to atsamd21 / atsamd51
- flash: add openocd settings to nrf5
- microbit: reelboard: flash using OpenOCD when needed
- nintendoswitch: Add dynamic loader for runtime loading PIE sections
- nintendoswitch: fix import cycle on dynamic_arm64.go
- nintendoswitch: Fix invalid memory read / write in print calls
- nintendoswitch: simplified assembly code
- nintendoswitch: support outputting .nro files directly
boards
- arduino-zero: Adding support for the Arduino Zero (#1365)
- atsamd2x: fix BAUD value
- atsamd5x: fix BAUD value
- bluepill: Enable stm32's USART2 for the board and map it to UART1 tinygo's device
- device/atsamd51x: add all remaining bitfield values for PCHCTRLm Mapping
- esp32: add libgcc ROM functions to linker script
- esp32: add SPI support
- esp32: add support for basic GPIO
- esp32: add support for the Espressif ESP32 chip
- esp32: configure the I/O matrix for GPIO pins
- esp32: export machine.PortMask* for bitbanging implementations
- esp8266: add support for this chip
- machine/atsamd51x,runtime/atsamd51x: fixes needed for full support for all PWM pins. Also adds some useful constants to clarify peripheral clock usage
- machine/itsybitsy-nrf52840: add support for Adafruit Itsybitsy nrf52840 (#1243)
- machine/stm32f4: refactor common code and add new build tag stm32f4 (#1332)
- nrf: add SoftDevice support for the Circuit Playground Bluefruit
- nrf: call sd_app_evt_wait when the SoftDevice is enabled
- nrf52840: add build tags for SoftDevice support
- nrf52840: use higher priority for USB-CDC code
- runtime/atsamd51x: use PCHCTRL_GCLK_SERCOMX_SLOW for setting clocks on all SERCOM ports
- stm32f405: add basic UART handler
- stm32f405: add STM32F405 machine/runtime, and new board/target feather-stm32f405
build
- all: run test binaries in the correct directory
- build: Fix arch release job
- ci: run tinygo test for known-working packages
- ci: set git-fetch-depth to 1
- docker: fix the problem with the wasm build (#1357)
- Makefile: check whether submodules have been downloaded in some common cases
docs
- add ESP32, ESP8266, and Adafruit Feather STM32F405 to list of supported boards

0.14.1

command-line
- support for Go 1.15
compiler
- loader: work around Windows symlink limitation

0.14.0

command-line
- fix getDefaultPort() on non-English Windows locales
- compileopts: improve error reporting of unsupported flags
- fix test subcommand
- use auto-retry to locate MSD for UF2 and HEX flashing
- fix touchSerialPortAt1200bps on Windows
- support package names with backslashes on Windows
compiler
- fix a few crashes due to named types
- add support for atomic operations
- move the channel blocked list onto the stack
- fix -gc=none
- fix named string to []byte slice conversion
- implement func value and builtin defers
- add proper parameter names to runtime.initAll, to fix a panic
- builder: fix picolibc include path
- builder: use newer version of gohex
- builder: try to determine stack size information at compile time
- builder: remove -opt=0
- interp: fix sync/atomic.Value load/store methods
- loader: add Go module support
- transform: fix debug information in func lowering pass
- transform: do not special-case zero or one implementations of a method call
- transform: introduce check for method calls on nil interfaces
- transform: gc: track 0-index GEPs to fix miscompilation
cgo
- Add LDFlags support
standard library
- extend stdlib to allow import of more packages
- replace master/slave terminology with appropriate alternatives (MOSI->SDO etc)
- internal/bytealg: reimplement bytealg in pure Go
- internal/task: fix nil panic in (*internal/task.Stack).Pop
- os: add Args and stub it with mock data
- os: implement virtual filesystem support
- reflect: add Cap and Len support for map and chan
- runtime: fix return address in scheduler on RISC-V
- runtime: avoid recursion in printuint64 function
- runtime: replace ReadRegister with AsmFull inline assembly
- runtime: fix compilation errors when using gc.extalloc
- runtime: add cap and len support for chans
- runtime: refactor time handling (improving accuracy)
- runtime: make channels work in interrupts
- runtime/interrupt: add cross-chip disable/restore interrupt support
- sync: implement sync.Cond
- sync: add WaitGroup
targets
- arm: allow nesting in DisableInterrupts and EnableInterrupts
- arm: make FPU configuration consistent
- arm: do not mask fault handlers in critical sections
- atmega2560: fix pin mapping for pins D2, D5 and the L port
- atsamd: return an error when an incorrect PWM pin is used
- atsamd: add support for pin change interrupts
- atsamd: add DAC support
- atsamd21: add more ADC pins
- atsamd51: fix ROM / RAM size on atsamd51j20
- atsamd51: add more pins
- atsamd51: add more ADC pins
- atsamd51: add pin change interrupt settings
- atsamd51: extend pinPadMapping
- arduino-nano33: use (U)SB flag to ensure that device can be found when not on default port
- arduino-nano33: remove (d)ebug flag to reduce console noise when flashing
- avr: use standard pin numbering
- avr: unify GPIO pin/port code
- avr: add support for PinInputPullup
- avr: work around codegen bug in LLVM 10
- avr: fix target triple
- fe310: remove extra println left in by mistake
- feather-nrf52840: add support for the Feather nRF52840
- maixbit: add board definition and dummy runtime
- nintendoswitch: Add experimental Nintendo Switch support without CRT
- nrf: expose the RAM base address
- nrf: add support for pin change interrupts
- nrf: add microbit-s110v8 target
- nrf: fix bug in SPI.Tx
- nrf: support debugging the PCA10056
- pygamer: add Adafruit PyGamer support
- riscv: fix interrupt configuration bug
- riscv: disable linker relaxations during gp init
- stm32f4disco: add new target with ST-Link v2.1 debugger
- teensy36: add Teensy 3.6 support
- wasm: fix event handling
- wasm: add --no-demangle linker option
- wioterminal: add support for the Seeed Wio Terminal
- xiao: add support for the Seeed XIAO

0.13.1

standard library
- runtime: do not put scheduler and GC code in the same section
- runtime: copy stack scan assembly for GBA
boards
- gameboy-advance: always use ARM mode instead of Thumb mode

0.13.0

command line
- use gdb-multiarch for debugging Cortex-M chips
- support tinygo run with simavr
- support LLVM 10
- support Go 1.14
- retry 3 times when attempting to do a 1200-baud reset
compiler
- mark the abort function as noreturn
- fix deferred calls to exported functions
- add debug info for local variables
- check for channel size limit
- refactor coroutine lowering
- add dereferenceable_or_null attribute to pointer parameters
- do not perform nil checking when indexing slices and on unsafe.Pointer
- remove runtime.isnil hack
- use LLVM builtins for runtime memcpy/memmove/memzero functions
- implement spec-compliant shifts on negative/overflow
- support anonymous type asserts
- track pointer result of string concatenation for GC
- track PHI nodes for GC
- add debug info to goroutine start wrappers
- optimize comparing interface values against nil
- fix miscompilation when deferring an interface call
- builder: include picolibc for most baremetal targets
- builder: run tools (clang, lld) as separate processes
- builder: use -fshort-enums consistently
- interp: add support for constant type asserts
- interp: better support for interface operations
- interp: include backtrace with error
- transform: do not track const globals for GC
- transform: replace panics with source locations
- transform: fix error in interface lowering pass
- transform: make coroutine lowering deterministic
- transform: fix miscompilation in func lowering
cgo
- make -I and -L paths absolute
standard library
- machine: set the USB VID and PID to the manufacturer values
- machine: correct USB CDC composite descriptors
- machine: move errors.New calls to globals
- runtime: support operations on nil maps
- runtime: fix copy builtin return value on AVR
- runtime: refactor goroutines
- runtime: support -scheduler=none on most platforms
- runtime: run package initialization in the main goroutine
- runtime: export malloc / free for use from C
- runtime: add garbage collector that uses an external allocator
- runtime: scan callee-saved registers while marking the stack
- runtime: remove recursion from conservative GC
- runtime: fix blocking select on nil channel
- runtime/volatile: include ReplaceBits method
- sync: implement trivial sync.Map
targets
- arm: use -fomit-frame-pointer
- atmega1284: support this chip for testing purposes
- atsamd51: make QSPI available on all boards
- atsamd51: add support for ADC1
- atsamd51: use new interrupt registration in UART code
- attiny: clean up pin definitions
- avr: use the correct RAM start address
- avr: pass the correct -mmcu flag to the linker
- avr: add support for tasks scheduler (disabled by default)
- avr: fix linker problem with overlapping program/data areas
- nrf: fix typo in pin configuration options
- nrf: add lib/nrfx/mdk to include dirs
- nrf52840: implement USB-CDC
- riscv: implement VirtIO target and add RISC-V integration test
- riscv: add I2C support for the HiFive1 rev B board
- stm32: refactor GPIO pin handling
- stm32: refactor UART code
- stm32f4: add SPI
- wasm: support Go 1.14 (breaking previous versions)
- wasm: support syscall/js.CopyBytesToJS
- wasm: sync polyfills from Go 1.14.
boards
- arduino-mega2560: add the Arduino Mega 2560
- clue-alpha: add the Adafruit CLUE Alpha
- gameboy-advance: enable debugging with GDB
- particle-argon: add the Particle Argon board
- particle-boron: add the Particle Boron board
- particle-xenon: add the Particle Xenon board
- reelboard: add reelboard-s140v7 SoftDevice target

0.12.0

command line
- add initial FreeBSD support
- remove getting a serial port in gdb subcommand
- add support for debugging through JLinkGDBServer
- fix CGo when cross compiling
- remove default port check for Digispark as micronucleus communicates directly using HID
- differentiate between various serial/USB error messages
builder
- improve detection of Clang headers
compiler
- fix assertion on empty interface
- don't crash when encountering types.Invalid
- revise defer to use heap allocations when running a variable number of times
- improve error messages for failed imports
- improve "function redeclared" error
- add globaldce pass to start of optimization pipeline
- add support for debugging globals
- implement RISC-V CSR operations as intrinsics
- add support for CGO_ENABLED environment variable
- do not emit debug info for extern globals (bugfix)
- add support for interrupts
- implement maps for arbitrary keys
- interp: error location for "unknown GEP" error
- wasm-abi: create temporary allocas in the entry block
cgo
- add support for symbols in #define
- fix a bug in number tokenization
standard library
- machine: avoid bytes package in USB logic
- runtime: fix external address declarations
- runtime: provide implementation for internal/bytealg.IndexByte
targets
- atsamd51: fix volatile usage
- atsamd51: fix ADC, updating to 12-bits precision
- atsamd51: refactor SPI pin configuration to only look at pin numbers
- atsamd51: switch UART to use new pin configuration
- atsamd51: fix obvious bug in I2C code
- atsamd51: use only the necessary UART interrupts
- atsamd51: refactor I2C pin handling to auto-detect pin mode
- avr: use a garbage collector
- fe310: use CLINT peripheral for timekeeping
- fe310: add support for PLIC interrupts
- fe310: implement UART receive interrupts
- riscv: support sleeping in QEMU
- riscv: add bare-bones interrupt support
- riscv: print exception PC and code
- wasm: implement memcpy and memset
- wasm: include wasi-libc
- wasm: use wasi ABI for basic startup/stdout
boards
- arduino: make avrdude command line compatible with Windows
- arduino-nano: add this board
- arduino-nano33: fix UART1 and UART2
- circuitplay-bluefruit: add this board
- digispark: add clock speed and pin mappings
- gameboy-advance: include compiler-rt in build
- gameboy-advance: implement interrupt handler
- hifive1b: add support for gdb subcommand
- pyportal: add this board
- pyportal: remove manual SPI pin mapping as now handled by default

0.11.0

command line
- add support for QEMU in gdb subcommand
- use builtin Clang when building statically, dropping the clang-9 dependency
- search for default serial port on both macOS and Linux
- windows: support tinygo flash directly by using win32 wmi
compiler
- add location information to the IR checker
- make reflection sidetables constant globals
- improve error locations in goroutine lowering
- interp: improve support for maps with string keys
- interp: add runtime fallback for mapassign operations
standard library
- machine: add support for SPI.Tx() on play.tinygo.org
- machine: rename CPU_FREQUENCY to CPUFrequency()
targets
- adafruit-pybadge: add Adafruit Pybadge
- arduino-nano33: allow simulation on play.tinygo.org
- arduino-nano33: fix default SPI pin numbers to be D13/D11/D12
- circuitplay-express: allow simulation on play.tinygo.org
- hifive1-qemu: add target for testing RISC-V bare metal in QEMU
- riscv: fix heap corruption due to changes in LLVM 9
- riscv: add support for compiler-rt
- qemu: rename to cortex-m-qemu

0.10.0

command line
- halt GDB after flashing with gdb subcommand
- fix a crash when using -ocd-output
- add info subcommand
- add -programmer flag
builder
- macos: use llvm@8 instead of just llvm in paths
- add linkerscript key to target JSON files
- write a symbol table when writing out the compiler-rt lib
- make Clang header detection more robust
- switch to LLVM 9
compiler
- fix interface miscompilation with reflect
- fix miscompile of static goroutine calls to closures
- fix todo: store panic
- fix incorrect starting value for optimized allocations in a loop
- optimize coroutines on non-Cortex-M targets
- fix crash for programs which have heap allocations but never hit the GC
- add support for async interface calls
- fix inserting non-const values in a const global
- interp: improve error reporting
- interp: implement comparing ptrtoint to 0
cgo
- improve diagnostics
- implement the constant parser (for #define) as a real parser
- rename reserved field names such as type
- avoid "unsafe" imported but not used error
- include all enums in the CGo Go AST
- add support for nested structs and unions
- implement #cgo CFLAGS
standard library
- reflect: add implementation of array alignment
- runtime: improve scheduler performance when no goroutines are queued
- runtime: add blocking select
- runtime: implement interface equality in non-trivial cases
- runtime: add AdjustTimeOffset to update current time
- runtime: only implement CountString for required platforms
- runtime: use MSP/PSP registers for scheduling on Cortex-M
targets
- arm: add system timer registers
- atmega: add port C GPIO support
- atsamd21: correct handling of pins >= 32
- atsamd21: i2s initialization fixes
- atsamd51: fix clock init code
- atsamd51: correct initialization for RTC
- atsamd51: fix pin function selection
- atsamd51: pin method cleanup
- atsamd51: allow setting pin mode for each of the SPI pins
- atsamd51: correct channel init and pin map for ADC based on ItsyBitsy-M4
- feather-m4: add Adafruit Feather M4 board
- hifive1b: add support for SPI1
- hifive1b: fix compiling in simulation
- linux: fix time on arm32
- metro-m4: add support for Adafruit Metro M4 Express Airlift board
- metro-m4: fixes for UART2
- pinetime-devkit0: add support for the PineTime dev kit
- x9pro: add support for this smartwatch
- pca10040-s132v6: add support for SoftDevice
- pca10056-s140v7: add support for SoftDevice
- arduino-nano33: added SPI1 connected to NINA-W102 chip on Arduino Nano 33 IOT

0.9.0

command line
- implement 1200-baud UART bootloader reset when flashing boards that support it
- flash using mass-storage device for boards that support it
- implement tinygo env
- add support for Windows (but not yet producing Windows binaries)
- add Go version to tinygo env
- update SVD files for up-to-date peripheral interfaces
compiler
- add //go:align pragma
- fix bug related to type aliases
- add support for buffered channels
- remove incorrect reflect optimization
- implement copying slices in init interpretation
- add support for constant indices with a named type
- add support for recursive types like linked lists
- fix miscompile of function nil panics
- fix bug related to goroutines
standard library
- machine: do not check for nil slices in SPI.Tx
- reflectlite: add support for Go 1.13
- runtime: implement internal/bytealg.CountString
- sync: properly handle nil New func in sync.Pool
targets
- arduino: fix .bss section initialization
- fe310: implement Pin.Get
- gameboy-advance: support directly outputting .gba files
- samd: reduce code size by avoiding reflection
- samd21: do not hardcode pin numbers for peripherals
- stm32f103: avoid issue with time.Sleep less than 200µs

0.8.0

command line
- fix parsing of beta Go versions
- check the major/minor installed version of Go before compiling
- validate -target flag better to not panic on an invalid target
compiler
- implement full slice expression: s[:2:4]
- fix a crash when storing a linked list in an interface
- fix comparing struct types by making type IDs more unique
- fix some bugs in IR generation
- add support for linked lists in reflect data
- implement []rune to string conversion
- implement support for go on func values
standard library
- reflect: add support for named types
- reflect: add support for t.Bits()
- reflect: add basic support for t.AssignableTo()
- reflect: implement t.Align()
- reflect: add support for struct types
- reflect: fix bug in v.IsNil and v.Pointer for addressable values
- reflect: implement support for array types
- reflect: implement t.Comparable()
- runtime: implement stack-based scheduler
- runtime: fix bug in the sleep queue of the scheduler
- runtime: implement memcpy for Cortex-M
- testing: implement stub testing.B struct
- testing: add common test logging methods such as Errorf/Fatalf/Printf
targets
- 386: add support for linux/386 syscalls
- atsamd21: make SPI pins configurable so that multiple SPI ports can be used
- atsamd21: correct issue with invalid first reading coming from ADC
- atsamd21: add support for reset-to-bootloader using 1200baud over USB-CDC
- atsamd21: make pin selection more flexible for peripherals
- atsamd21: fix minimum delay in time.Sleep
- atsamd51: fix minimum delay in time.Sleep
- nrf: improve SPI write-only speed, by making use of double buffering
- stm32f103: fix SPI frequency selection
- stm32f103: add machine.Pin.Get method for reading GPIO values
- stm32f103: allow board specific UART usage
- nucleo-f103rb: add support for NUCLEO-F103RB board
- itsybitsy-m4: add support for this board with a SAMD51 family chip
- cortex-m: add support for arm.SystemReset()
- gameboy-advance: add initial support for the GameBoy Advance
- wasm: add //go:wasm-module magic comment to set the wasm module name
- wasm: add syscall/js.valueSetIndex support
- wasm: add syscall/js.valueInvoke support

0.7.1

targets
- atsamd21: add support for the -port flag in the flash subcommand

0.7.0

command line
- try more locations to find Clang built-in headers
- add support for tinygo test
- build current directory if no package is specified
- support custom .json target spec with -target flag
- use zversion.go to detect version of GOROOT version
- make initial heap size configurable for some targets (currently WebAssembly only)
cgo
- add support for bitfields using generated getters and setters
- add support for anonymous structs
compiler
- show an error instead of panicking on duplicate function definitions
- allow packages like github.com/tinygo-org/tinygo/src/* by aliasing it
- remove //go:volatile support
  It has been replaced with the runtime/volatile package.
- allow poiners in map keys
- support non-constant syscall numbers
- implement non-blocking selects
- add support for the -tags flag
- add support for string to []rune conversion
- implement a portable conservative garbage collector (with support for wasm)
- add the //go:noinline pragma
standard library
- os: add os.Exit and syscall.Exit
- os: add several stubs
- runtime: fix heap corruption in conservative GC
- runtime: add support for math intrinsics where supported, massively speeding up some benchmarks
- testing: add basic support for testing
targets
- add support for a generic target that calls __tinygo_* functions for peripheral access
- arduino-nano33: add support for this board
- hifive1: add support for this RISC-V board
- reelboard: add e-paper pins
- reelboard: add PowerSupplyActive to enable voltage for on-board devices
- wasm: put the stack at the start of linear memory, to detect stack overflows

0.6.0

command line
- some portability improvements
- make $GOROOT more robust and configurable
- check for Clang at the Homebrew install location as fallback
compiler driver
- support multiple variations of LLVM commands, for non-Debian distributions
compiler
- improve code quality in multiple ways
- make panic configurable, adding trap on panic
- refactor many internal parts of the compiler
- print all errors encountered during compilation
- implement calling function values of a named type
- implement returning values from blocking functions
- allow larger-than-int values to be sent across a channel
- implement complex arithmetic
- improve hashmap support
- add debuginfo for function arguments
- insert nil checks on stores (increasing code size)
- implement volatile operations as compiler builtins
- add //go:inline pragma
- add build tags for the Go stdlib version
cgo
- implement char, enum and void* types
- support #include for builtin headers
- improve typedef/struct/enum support
- only include symbols that are necessary, for broader support
- mark external function args as nocapture
- implement support for some #define constants
- implement support for multiple CGo files in a single package

standard library
- machine: remove microbit matrix (moved to drivers repository)
- machine: refactor pins to use Pin type instead of GPIO
- runtime: print more interface types on panic, including error

targets
- arm: print an error on HardFault (including stack overflows)
- atsamd21: fix a bug in the ADC peripheral
- atsamd21: add support for I2S
- feather-m0: add support for this board
- nrf51: fix a bug in I2C
- stm32f103xx: fix a bug in I2C
- syscall: implement Exit on unix
- trinket-m0: add support for this board
- wasm: make main example smaller
- wasm: don't cache wasm file in the server, for ease of debugging
- wasm: work around bug #41508 that caused a deadlock while linking
- wasm: add support for js.FuncOf

0.5.0

compiler driver
- use wasm-ld instead of wasm-ld-8 on macOS
- drop dependency on llvm-ar
- fix linker script includes when running outside TINYGOROOT
compiler
- switch to LLVM 8
- add support for the Go 1.12 standard library (Go 1.11 is still supported)
- work around lack of escape analysis due to nil checks
- implement casting named structs and pointers to them
- fix int casting to use the source signedness
- fix some bugs around make([]T, …) with uncommon index types
- some other optimizations
- support interface asserts in interp for "math/rand" support
- resolve all func value targets at compile time (wasm-only at the moment)
cgo
- improve diagnostics
- implement C struct, union, and arrays
- fix CGo-related crash in libclang
- implement C.struct_ types
targets
- all baremetal: pretend to be linux/arm instead of js/wasm
- avr: improve uintptr support
- cortexm: implement memmove intrinsic generated by LLVM
- cortexm: use the lld linker instead of arm-none-eabi-ld
- darwin: use custom syscall package that links to libSystem.dylib
- microbit: add blink example
- samd21: support I2C1
- samd21: machine/atsamd21: correct pad/pin handling when using both UART and USBCDC interfaces at same time
- stm32f4discovery: add support for this board
- wasm: support async func values
- wasm: improve documentation and add extra example

0.4.1

compiler
- fix objcopy replacement to include the .data section in the firmware image
- use llvm-ar-7 on Linux to fix the Docker image

0.4.0

compiler
- switch to the hardfloat ABI on ARM, which is more widely used
- avoid a dependency on objcopy (arm-none-eabi-objcopy etc.)
- fix a bug in make([]T, n) where n is 64-bits on a 32-bit platform
- adapt to a change in the AVR backend in LLVM 8
- directly support the .uf2 firmware format as used on Adafruit boards
- fix a bug when calling panic() at init time outside of the main package
- implement nil checks, which results in a ~5% increase in code size
- inline slice bounds checking, which results in a ~1% decrease in code size
targets
- samd21: fix a bug in port B pins
- samd21: implement SPI peripheral
- samd21: implement ADC peripheral
- stm32: fix a bug in timekeeping
- wasm: fix a bug in wasm_exec.js that caused corruption in linear memory when running on Node.js.

0.3.0

compiler
- remove old -initinterp flag
- add support for macOS
cgo
- add support for bool/float/complex types
standard library
- device/arm: add support to disable/enable hardware interrupts
- machine: add CPU frequency for nrf-based boards
- syscall: add support for darwin/amd64
targets
- circuitplay_express: add support for this board
- microbit: add regular pin constants
- samd21: fix time function for goroutine support
- samd21: add support for USB-CDC (serial over USB)
- samd21: add support for pins in port B
- samd21: add support for pullup and pulldown pins
- wasm: add support for Safari in example

0.2.0

command line
- add version subcommand
compiler
- fix a bug in floating point comparisons with NaN values
- fix a bug when calling panic in package initialization code
- add support for comparing complex64 and complex128
cgo
- add support for external globals
- add support for pointers and function pointers
standard library
- fmt: initial support, fmt.Println works
- math: support for most/all functions
- os: initial support (only stdin/stdout/stderr)
- reflect: initial support
- syscall: add support for amd64, arm, and arm64

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CHANGELOG.md

CHANGELOG.md

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