Linux 制作插件出现undefined reference to `dlerror‘问题

usr/bin/ld: /tmp/ccVDsrnE.o: in function `main':
main.cpp:(.text+0x19): undefined reference to `dlerror'
/usr/bin/ld: main.cpp:(.text+0x5d): undefined reference to `dlsym'
/usr/bin/ld: main.cpp:(.text+0xb0): undefined reference to `dlclose'
/usr/bin/ld: /tmp/ccVDsrnE.o: in function `__static_initialization_and_destruction_0(int, int)':
main.cpp:(.text+0x112): undefined reference to `dlopen'
collect2: error: ld returned 1 exit status
 

出现该问题，需要在#include <dlfcn.h>，如果仍然无法解决，在用命令行编译时，添加一个参数:  -ldl