FIRST_DLL

g++写dll

1.my_dll.h：

#pragma once
// #ifdef MY_DLL_EXPORTS//vs下
// #   define MY_DLL_EXP __declspec(dllexport)
// #else
// #   define MY_DLL_EXP __declspec(dllimport)
// #endif

#ifdef __cplusplus
extern "C" {
#endif

class WHYCAN_T {
public:
	void hello();
};

#ifdef __cplusplus
}
#endif

2.my_dll.cpp：

#include<iostream>
#include"my_dll.h"

extern "C" {
void WHYCAN_T::hello()
{
	std::cout << "Hello,this is my dll ^_^" << std::endl;
}
}

3.resource.cpp:

#include "my_dll.h"

int main()
{
	WHYCAN_T helloDll;
	helloDll.hello();
	return 0;
}

4.MINGW:

MINGW64 ~/Desktop/TEST_DLL
$ ls
my_dll.cpp  my_dll.h  resource.cpp

MINGW64 ~/Desktop/TEST_DLL
$ g++ --share my_dll.cpp -o my_dll.dll

MINGW64 ~/Desktop/TEST_DLL
$ g++ resource.cpp my_dll.dll -o 111.exe

MINGW64 ~/Desktop/TEST_DLL
$ ./111.exe
Hello,this is my dll ^_^

---

VS写dll , g++ 调用

1.在DLL项目里的main.cpp

#include <iostream>
#include <windows.h>

extern "C" __declspec(dllexport) void Go() {
　　std::cout << "go" << std::endl;
}

BOOL APIENTRY DllMain( HMODULE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
switch (ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
case DLL_THREAD_ATTACH:
case DLL_THREAD_DETACH:
case DLL_PROCESS_DETACH:
break;
}
return TRUE;
}

然后生成

2.将mydll.lib , mydll.dll , mydll.exp , mydll.pdb复制到main.cpp当前目录

MINGW64 ~/Desktop/test2
$ ls
main.cpp  mydll.dll*  mydll.exp  mydll.lib  mydll.pdb

3.编译执行：

MINGW64 ~/Desktop/test2
$ g++ main.cpp -lmydll -L.

MINGW64 ~/Desktop/test2
$ ls
a.exe*  main.cpp  mydll.dll*  mydll.exp  mydll.lib  mydll.pdb

MINGW64 ~/Desktop/test2
$ ./a.exe
go