all: change //go:export to //export

This is the kind that is used in Go (actually CGo) for exporting
functions. I think it's best to use //export instead of our custom
//go:export pragma, for consistency (they are equivalent in TinyGo).
Therefore I've updated all instances to the standard format (except for
two that are updated in https://github.com/tinygo-org/tinygo/pull/1024).

No smoke tests changed (when comparing the output hash), except for some
wasm tests that include DWARF debug info and tend to be flaky anyway.

src/examples/systick/systick.go

@@ -17,7 +17,7 @@ func main() {
 
 var led_state bool
 
-//go:export SysTick_Handler
+//export SysTick_Handler
 func timer_isr() {
 	if led_state {
 		machine.LED.Low()

src/examples/wasm/README.md

@@ -2,7 +2,7 @@
 
 The examples here show two different ways of using WebAssembly with TinyGo:
 
-1. Defining and exporting functions via the `//go:export <name>` directive. See
+1. Defining and exporting functions via the `//export <name>` directive. See
 [the export folder](./export) for an example of this.  Additionally, the Wasm
 module (which has a default value of `env`) can be specified using
 `//go:wasm-module <module>`.

src/examples/wasm/export/wasm.go

@@ -8,12 +8,12 @@ import (
 func main() {
 }
 
-//go:export add
+//export add
 func add(a, b int) int {
 	return a + b
 }
 
-//go:export update
+//export update
 func update() {
 	document := js.Global().Get("document")
 	aStr := document.Call("getElementById", "a").Get("value").String()

src/internal/task/task_coroutine.go

@@ -10,12 +10,12 @@ import (
 // This matches *i8 in LLVM.
 type rawState uint8
 
-//go:export llvm.coro.resume
+//export llvm.coro.resume
 func (s *rawState) resume()
 
 type state struct{ *rawState }
 
-//go:export llvm.coro.noop
+//export llvm.coro.noop
 func noopState() *rawState
 
 // Resume the task until it pauses or completes.

src/machine/machine_generic.go

@@ -31,13 +31,13 @@ func (p Pin) Get() bool {
 	return gpioGet(p)
 }
 
-//go:export __tinygo_gpio_configure
+//export __tinygo_gpio_configure
 func gpioConfigure(pin Pin, config PinConfig)
 
-//go:export __tinygo_gpio_set
+//export __tinygo_gpio_set
 func gpioSet(pin Pin, value bool)
 
-//go:export __tinygo_gpio_get
+//export __tinygo_gpio_get
 func gpioGet(pin Pin) bool
 
 type SPI struct {
@@ -61,10 +61,10 @@ func (spi SPI) Transfer(w byte) (byte, error) {
 	return spiTransfer(spi.Bus, w), nil
 }
 
-//go:export __tinygo_spi_configure
+//export __tinygo_spi_configure
 func spiConfigure(bus uint8, sck Pin, mosi Pin, miso Pin)
 
-//go:export __tinygo_spi_transfer
+//export __tinygo_spi_transfer
 func spiTransfer(bus uint8, w uint8) uint8
 
 // InitADC enables support for ADC peripherals.
@@ -81,7 +81,7 @@ func (adc ADC) Get() uint16 {
 	return adcRead(adc.Pin)
 }
 
-//go:export __tinygo_adc_read
+//export __tinygo_adc_read
 func adcRead(pin Pin) uint16
 
 // InitPWM enables support for PWM peripherals.
@@ -98,7 +98,7 @@ func (pwm PWM) Set(value uint16) {
 	pwmSet(pwm.Pin, value)
 }
 
-//go:export __tinygo_pwm_set
+//export __tinygo_pwm_set
 func pwmSet(pin Pin, value uint16)
 
 // I2C is a generic implementation of the Inter-IC communication protocol.
@@ -125,10 +125,10 @@ func (i2c I2C) Tx(addr uint16, w, r []byte) error {
 	return nil
 }
 
-//go:export __tinygo_i2c_configure
+//export __tinygo_i2c_configure
 func i2cConfigure(bus uint8, scl Pin, sda Pin)
 
-//go:export __tinygo_i2c_transfer
+//export __tinygo_i2c_transfer
 func i2cTransfer(bus uint8, w *byte, wlen int, r *byte, rlen int) int
 
 type UART struct {
@@ -174,11 +174,11 @@ func (uart UART) WriteByte(b byte) error {
 	return nil
 }
 
-//go:export __tinygo_uart_configure
+//export __tinygo_uart_configure
 func uartConfigure(bus uint8, tx Pin, rx Pin)
 
-//go:export __tinygo_uart_read
+//export __tinygo_uart_read
 func uartRead(bus uint8, buf *byte, bufLen int) int
 
-//go:export __tinygo_uart_write
+//export __tinygo_uart_write
 func uartWrite(bus uint8, buf *byte, bufLen int) int

src/runtime/arch_wasm.go

@@ -14,7 +14,7 @@ const TargetBits = 32
 //go:extern __heap_base
 var heapStartSymbol [0]byte
 
-//go:export llvm.wasm.memory.size.i32
+//export llvm.wasm.memory.size.i32
 func wasm_memory_size(index int32) int32
 
 var (

src/runtime/math.go

@@ -63,7 +63,7 @@ func math_Ceil(x float64) float64 {
 	return math_ceil(x)
 }
 
-//go:export llvm.ceil.f64
+//export llvm.ceil.f64
 func llvm_ceil(x float64) float64
 
 //go:linkname math_ceil math.ceil
@@ -119,7 +119,7 @@ func math_Floor(x float64) float64 {
 	return math_floor(x)
 }
 
-//go:export llvm.floor.f64
+//export llvm.floor.f64
 func llvm_floor(x float64) float64
 
 //go:linkname math_floor math.floor
@@ -175,7 +175,7 @@ func math_Max(x, y float64) float64 {
 	return math_max(x, y)
 }
 
-//go:export llvm.maximum.f64
+//export llvm.maximum.f64
 func llvm_maximum(x, y float64) float64
 
 //go:linkname math_max math.max
@@ -189,7 +189,7 @@ func math_Min(x, y float64) float64 {
 	return math_min(x, y)
 }
 
-//go:export llvm.minimum.f64
+//export llvm.minimum.f64
 func llvm_minimum(x, y float64) float64
 
 //go:linkname math_min math.min
@@ -239,7 +239,7 @@ func math_Sqrt(x float64) float64 {
 	return math_sqrt(x)
 }
 
-//go:export llvm.sqrt.f64
+//export llvm.sqrt.f64
 func llvm_sqrt(x float64) float64
 
 //go:linkname math_sqrt math.sqrt
@@ -265,7 +265,7 @@ func math_Trunc(x float64) float64 {
 	return math_trunc(x)
 }
 
-//go:export llvm.trunc.f64
+//export llvm.trunc.f64
 func llvm_trunc(x float64) float64
 
 //go:linkname math_trunc math.trunc

src/runtime/panic.go

@@ -2,7 +2,7 @@ package runtime
 
 // trap is a compiler hint that this function cannot be executed. It is
 // translated into either a trap instruction or a call to abort().
-//go:export llvm.trap
+//export llvm.trap
 func trap()
 
 // Builtin function panic(msg), used as a compiler intrinsic.

src/runtime/runtime_arm7tdmi.go

@@ -33,7 +33,7 @@ var _edata [0]byte
 func postinit() {}
 
 // Entry point for Go. Initialize all packages and call main.main().
-//go:export main
+//export main
 func main() {
 	// Initialize .data and .bss sections.
 	preinit()

src/runtime/runtime_atsamd21.go

@@ -15,7 +15,7 @@ type timeUnit int64
 
 func postinit() {}
 
-//go:export Reset_Handler
+//export Reset_Handler
 func main() {
 	preinit()
 	run()

src/runtime/runtime_atsamd51.go

@@ -14,7 +14,7 @@ type timeUnit int64
 
 func postinit() {}
 
-//go:export Reset_Handler
+//export Reset_Handler
 func main() {
 	preinit()
 	run()

src/runtime/runtime_avr.go

@@ -36,7 +36,7 @@ var _sbss [0]byte
 //go:extern _ebss
 var _ebss [0]byte
 
-//go:export main
+//export main
 func main() {
 	preinit()
 	run()

src/runtime/runtime_cortexm.go

@@ -74,7 +74,7 @@ type interruptStack struct {
 // For details, see:
 // https://community.arm.com/developer/ip-products/system/f/embedded-forum/3257/debugging-a-cortex-m0-hard-fault
 // https://blog.feabhas.com/2013/02/developing-a-generic-hard-fault-handler-for-arm-cortex-m3cortex-m4/
-//go:export handleHardFault
+//export handleHardFault
 func handleHardFault(sp *interruptStack) {
 	print("fatal error: ")
 	if uintptr(unsafe.Pointer(sp)) < 0x20000000 {

src/runtime/runtime_cortexm_qemu.go

@@ -19,7 +19,7 @@ var timestamp timeUnit
 
 func postinit() {}
 
-//go:export Reset_Handler
+//export Reset_Handler
 func main() {
 	preinit()
 	run()

src/runtime/runtime_fe310.go

@@ -18,7 +18,7 @@ type timeUnit int64
 
 func postinit() {}
 
-//go:export main
+//export main
 func main() {
 	// Zero the PLIC enable bits on startup: they are not zeroed at reset.
 	sifive.PLIC.ENABLE[0].Set(0)

src/runtime/runtime_nrf.go

@@ -19,7 +19,7 @@ func systemInit()
 
 func postinit() {}
 
-//go:export Reset_Handler
+//export Reset_Handler
 func main() {
 	systemInit()
 	preinit()

src/runtime/runtime_stm32.go

@@ -6,7 +6,7 @@ type timeUnit int64
 
 func postinit() {}
 
-//go:export Reset_Handler
+//export Reset_Handler
 func main() {
 	preinit()
 	run()

src/runtime/runtime_tinygoriscv_qemu.go

@@ -19,7 +19,7 @@ var timestamp timeUnit
 
 func postinit() {}
 
-//go:export main
+//export main
 func main() {
 	preinit()
 	run()

src/runtime/runtime_unix.go

@@ -6,22 +6,22 @@ import (
 	"unsafe"
 )
 
-//go:export putchar
+//export putchar
 func _putchar(c int) int
 
-//go:export usleep
+//export usleep
 func usleep(usec uint) int
 
-//go:export malloc
+//export malloc
 func malloc(size uintptr) unsafe.Pointer
 
-//go:export abort
+//export abort
 func abort()
 
-//go:export exit
+//export exit
 func exit(code int)
 
-//go:export clock_gettime
+//export clock_gettime
 func clock_gettime(clk_id int32, ts *timespec)
 
 type timeUnit int64
@@ -41,7 +41,7 @@ const CLOCK_MONOTONIC_RAW = 4
 func postinit() {}
 
 // Entry point for Go. Initialize all packages and call main.main().
-//go:export main
+//export main
 func main() int {
 	preinit()
 
@@ -83,5 +83,5 @@ func extalloc(size uintptr) unsafe.Pointer {
 	return malloc(size)
 }
 
-//go:export free
+//export free
 func extfree(ptr unsafe.Pointer)

src/runtime/runtime_wasm.go

@@ -53,14 +53,14 @@ func setEventHandler(fn func()) {
 	handleEvent = fn
 }
 
-//go:export resume
+//export resume
 func resume() {
 	go func() {
 		handleEvent()
 	}()
 }
 
-//go:export go_scheduler
+//export go_scheduler
 func go_scheduler() {
 	scheduler()
 }
@@ -69,10 +69,10 @@ const asyncScheduler = true
 
 // This function is called by the scheduler.
 // Schedule a call to runtime.scheduler, do not actually sleep.
-//go:export runtime.sleepTicks
+//export runtime.sleepTicks
 func sleepTicks(d timeUnit)
 
-//go:export runtime.ticks
+//export runtime.ticks
 func ticks() timeUnit
 
 // Abort executes the wasm 'unreachable' instruction.

src/syscall/syscall_darwin.go

@@ -12,7 +12,7 @@ package syscall
 //         return errno;
 //     }
 //
-//go:export __error
+//export __error
 func libc___error() *int32
 
 // getErrno returns the current C errno. It may not have been caused by the last

src/syscall/syscall_libc.go

@@ -53,5 +53,5 @@ func splitSlice(p []byte) (buf *byte, len uintptr) {
 }
 
 // ssize_t write(int fd, const void *buf, size_t count)
-//go:export write
+//export write
 func libc_write(fd int32, buf *byte, count uint) int

testdata/calls.go

@@ -100,7 +100,7 @@ func deferred(msg string, i int) {
 	println(msg, i)
 }
 
-//go:export __exportedDefer
+//export __exportedDefer
 func exportedDefer() {
 	println("...exported defer")
 }