golang调用c库函数
 
 
- 本文章介绍了golang如何调用c语言库函数。如果想调用c++库函数,建议在c++上再封一层c语言代码,编译成c语言动态库,再被golang调用。
 
c语言相关代码 
 
#ifndef __MYTEST_H_
#define __MYTEST_H_
#ifdef __cplusplus
extern "C" {
#endif
    int TestCgo(const char *buffer, unsigned int length);
#ifdef __cplusplus
}
#endif
#endif /* __MYTEST_H_*/
 
golang相关代码 
package cgotest
// #cgo LDFLAGS: -L./lib -lwrappertest -Wl,-rpath,/usr/local/lib -Wl,-rpath,$ORIGIN/lib
// #cgo CFLAGS: -I./include
// #include "mytest.h"
import "C"
import (
	"fmt"
	"unsafe"
)
type fakeString struct {
	Data *C.char
	Len  int
}
func test() {
	var s string = "helloworld"
	cString := (*fakeString)(unsafe.Pointer(&s))
	cData := cString.Data
	cLen := C.uint(len(s))
	fmt.Println(C.TestCgo(cData, cLen)
}
 
 
golang编译 
 
go build -o test