golang1.7 關於CGO的一個小問題:C.free使用.

這是一個建立於 的文章，其中的資訊可能已經有所發展或是發生改變。

package main// #include <stdlib.h>import "C"import (    "fmt"    "syscall"    "unsafe")func main() {    kernel := syscall.NewLazyDLL("Kernel32.dll")    defer syscall.CloseHandler(syscall.Handle.(kernel.Handle()))    volume := kernel.NewProc("GetVolumePathNameA")    char := C.CString("D:")    defer C.free(unsafe.Pointer(char))    n := make([]byte, 254)    _, _, err := volume.Call(uintptr(unsafe.Pointer(char)), uintptr(unsafe.Pointer(&n[0])), 254)    fmt.Println(err)    fmt.Println(string(n))}

當我想使用C.free()釋放申請的變數的時候.提示沒有此函數.
後來百度無果,Google連結到官方文檔看到下面這段解釋

// Go string to C string// The C string is allocated in the C heap using malloc.// It is the caller's responsibility to arrange for it to be// freed, such as by calling C.free (be sure to include stdlib.h// if C.free is needed).func C.CString(string) *C.char// C string to Go stringfunc C.GoString(*C.char) string// C data with explicit length to Go stringfunc C.GoStringN(*C.char, C.int) string// C data with explicit length to Go []bytefunc C.GoBytes(unsafe.Pointer, C.int) []byte

所以使用C.free的時候必須要 include