#cgo makes it possible to use C code in Golang.
##Hello World A simple example, create the file main.go:
package main
/*
#include <stdio.h>
void sayHi() {
printf("Hi");
}
*/
import "C"
func main() {
C.sayHi()
}Execute the program:
go run main.goThe program executes and outputs hi (for more examples, see $GOROOT/misc/ cgo).
Preparation work under Windows
If you want to use cgo on Windows, you need to install the gcc compiler. Here I use mingw-w64.Set compilation and link flags
What we use import "C" to import is a pseudo-package (pseudo-package), through which we use C code. Before import "C", the comment immediately following import "C" can include:编译器和链接器标志 C 代码We can set the compiler and linker flags through the #cgo directive, for example:
// #cgo CFLAGS: -DPNG_DEBUG=1 // #cgo amd64 386 CFLAGS: -DX86=1 // #cgo LDFLAGS: -lpng // #include <png.h> import "C"
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