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ubuntu下制作动态链接库 so 文件并且调用
source link: https://blog.popkx.com/ubuntu-make-dynamic-library-and-use-it/
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ubuntu下制作动态链接库 so 文件并且调用
直接进入例子，将要编译成 so 文件的代码（testSo.c）贴出：
#include "stdio.h"
void lccprints(void)
{
printf("hello lcc, this is from so file.\n");
}
注意，不能有 main 函数，执行以下命令编译：
gcc testSo.c -fPIC -shared -o libtest.so
得到so文件。以下是调用部分，直接贴出代码：
#include "stdio.h"
#include "dlfcn.h"
typedef void (*myfun)(void);
void main()
{
myfun sofun;
printf("ready to work\n");
void *dp = dlopen("./libtest.so",RTLD_LAZY); // 动态链接库文件名，这里是同目录
if(dp==NULL)
printf("dlopen error\n");
sofun = dlsym(dp," lccprints "); // 入口函数名
if(dlerror() != NULL)
printf("dlerror\n");
sofun();
dlclose(dp);
}
gcc lccuseso.c -o testSo.out -L ./ -ldl
得到程序 testSo.out，执行结果如下
$ ./testSo.out
ready to work
hello lcc, this is from so file.
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