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` : elminate 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 configuraton 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 suport
- `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
