Golang calling a dynamic library

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Test the Dynamic Library

Test_so.h

int test_so_func (int A,int b);

Test_so.c

" test_so.h " int test_so_func (int A,int  b) {    return A *b;}

Generate so

gcc -shared./test_so.c-o test_so.so

Copy so files to the Golang project directory

Golang project directory, establish

Load_so.h

int do_test_so_func (int A,int b);

Load_so.c

#include"load_so.h"#include<dlfcn.h>intDo_test_so_func (intAintb) {    void*handle; typedefint(*FPTR) (int,int); Handle= Dlopen ("./test_so.so",1); Fptr fptr= (fptr) dlsym (handle,"Test_so_func"); intresult = (*fptr)    (A, B); returnresult;}

Test.go

Package Main /* #include "load_so.h" #cgo ldflags:-ldl */  "C""fmt"func Main () {    Fmt. Println ("20*30=", C.do_test_so_func ())} 

Compile and run.

Note: A great God in the Go call C, fell into a hole, address http://www.newjueqi.com/?p=106, the conclusion is

1./* */Comment The code next line must be import "C", middle cannot have blank line
2.import "C" must be a separate line and cannot be imported with other libraries