golang cgo调用lib
hello.h
#ifndef HELLO_H_
#define HELLO_H_
#ifdef __cplusplus
extern "C" {
#endif
extern int hello(char *name, int age);
#ifdef __cplusplus
}
#endif
#endif // HELLO_H_
hello.cpp
#include <stdio.h>
#include "hello.h"
int hello(char *name, int age) {
printf("Hello %s, your age is %d.\n", name, age);
return age;
}
hello.a
gcc -Wall -c hello.c
ar -rv libhello.a hello.o
hello.go
package main
/*
#cgo CFLAGS: -I.
#cgo LDFLAGS: -L. -lhello
#include <stdio.h>
#include <stdlib.h>
#include "hello.h"
*/
import "C"
import (
"fmt"
"unsafe"
)
func main() {
name := C.CString("Jack")
defer C.free(unsafe.Pointer(name))
age := C.int(18)
result := C.hello(name, age)
fmt.Println(result)
}
output
GOROOT=C:\Go #gosetup
GOPATH=E:\kaisawind\go #gosetup
C:\Go\bin\go.exe build -o C:\Users\kaisa\AppData\Local\Temp\___go_build_github_com_kaisawind_ffmpeg_go_test.exe github.com/kaisawind/ffmpeg.go/test #gosetup
C:\Users\kaisa\AppData\Local\Temp\___go_build_github_com_kaisawind_ffmpeg_go_test.exe #gosetup
18
Hello Jack, your age is 18.
Process finished with exit code 0
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