tinygo-org/tinygo v0.21.0

0.21.0

on GitHub

This release brings many small changes to the TinyGo compiler toolchain. Some of the highlights are: support for building Windows binaries in TinyGo, improved goroutine support on WebAssembly using Asyncify, and many small fixes that together get 12 more standard library packages to pass the package tests. Of course, there is also a number of improvements for microcontrollers such as ESP32-C3 and the RP2040. And lastly, we've added support for the M5Stack Core2 board.

• 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