如何使用.so文件运行C程序

Question

I have gone through all the solutions on stackoverflow as well as ask ubuntu.

I have a go program

package main

import "C"

//export Getint
func Getint() int {
        return  2
}

func main() {}

and i have generated .so file for the same with name t.so and header file t.h

Now I would like to use this function in my C program. I have written the code but I don't know how to execute it.

#include <stdio.h>
#include <t.h>
int main()
{
int a;
a=Getint();
printf("number : %d",a);
return 0;
}

when I execute it with

gcc c.c t.so

it generates a.out file

but at the time of running a.out with ./a.out it gives error

./a.out
Error while loading shared libraries: t.so: can not open shared object file: no such file or directory exists.

then I tried with

gcc -c c.c -l t.so

so it generates c.o file and it is not executable.

Answer 1

Most probably your loader cannot find the library. Try to put the path to the directory where the libarry is located to LD_LIBRARY_PATH prior to run your binary.

export LD_LIBRARY_PATH=/path/to/my/library
./a.out