Plugin System using `dlopen`

main.cpp

#include "PluginInterface.hpp"
#include <dlfcn.h>
#include <iostream>

typedef PluginInterface *(*creatorFunction)();

int main()
{
    void *handle = dlopen("myplugin.so", RTLD_LAZY);
    if (!handle)
    {
        fprintf(stderr, "dlopen failure: %s\n", dlerror());
        exit(EXIT_FAILURE);
    }
    creatorFunction create = (creatorFunction)dlsym(handle, "create_plugin");

    PluginInterface *plugin = (*create)();
    plugin->method();
    delete plugin;

    dlclose(handle);
    return 0;
}

Makefile

all:
	g++ -shared -fPIC MyPlugin.cpp -o myplugin.so
	g++ main.cpp -o main -ldl

MyPlugin.cpp

#include "PluginInterface.hpp"
#include <iostream>

class MyPlugin : public PluginInterface
{
public:
    virtual void method() override;
};

void MyPlugin::method()
{
    std::cout << "Method is called\n";
}

extern "C" PluginInterface* create_plugin()
{
    return new MyPlugin();
}

PluginInterface.hpp

class PluginInterface
{
public:
    virtual void method() = 0;
};