1.跨平台动态库头文件定义

#if (defined _WIN32 || defined _WIN64)
#   ifdef MY_EXPORTS
#       define MY_EXTERN extern "C" __declspec(dllexport)
#   else
#       define MY_EXTERN extern "C" __declspec(dllimport)
#   endif
#   define MY_API 
#else
#   ifdef __linux__
#       define MY_EXTERN extern "C" __attribute__((visibility("default")))
#   else
#       define MY_EXTERN
#   endif
#   define MY_API
#endif

使用，函数声明

MY_EXTERN int MY_API MY_Init();

函数定义

MY_EXTERN int MY_API MY_Init()
{
    return 0;
}

 

2.跨平台配置

#if (defined(_WIN32) || defined(_WIN32_WCE) || defined(_WIN64))

    #pragma warning(disable: 4819) //unicode字符警告

    //MSVC Version (vs98/vs2003/vs2005/vs2008/vs2010)
    #if (_MSC_VER >= 1600)        //vs2010
        #pragma warning(disable: 4996)
        #define MSVC_2010
    #elif (_MSC_VER >= 1500)    //vs2008
        #pragma warning(disable: 4996)
        #define MSVC_2008
    #elif (_MSC_VER >= 1400)    //vs2005
        #define MSVC_2005
    #elif (_MSC_VER >= 1310)    //vs2003
        #define _WIN32_WINNT 0x0500
        #define MSVC_2003        
    #else                        //vs98
        #define _WIN32_WINNT 0x0500
        #pragma warning(disable: 4786)
        #pragma warning(disable: 4710)
        #define MSVC_98
    #endif

    #if defined(_WIN32_WCE)
        #define OS_WINCE  1
    #endif
    #if defined(_WIN64)
        #define OS_WINDOWS64    1
    #endif

    #pragma warning(disable:4100)
    #pragma warning(disable:4127)

    #ifndef CALLBACK
    #define CALLBACK __stdcall
    #endif

    #include <winsock2.h>    
    #include <ws2tcpip.h>
    #include <windows.h>
    #include <stdio.h>
    #include <stdlib.h>

    #ifdef WINAPI_FAMILY_PARTITION    //avoid warning
        #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_PHONE)
            #define OS_WINPHONE    1

            #if (_WIN32_WINNT == _WIN32_WINNT_WIN8)
                #define OS_WINPHONE8    1
            #endif
        #endif
    #endif

#ifndef OS_WINPHONE
    #include <Mswsock.h>
#endif
    
    #define OS_WINDOWS    1


#elif (defined(__linux__) || defined(__APPLE__) || defined(__SYMBIAN32__) || defined(ANDROID))

    #include <unistd.h>    
    #include <sys/socket.h>
    #include <sys/ioctl.h>
    #include <netinet/in.h>
    #include <arpa/inet.h>
    #include <sys/types.h>
    #include <netdb.h>
    #include <errno.h>
    #include <string.h>
    #include <stdio.h>
    #include <stdlib.h>
    #include <stdarg.h>
    #include <net/if.h>

    #if (defined(__SYMBIAN32__) || defined(ANDROID))
        #include <sys/stat.h>
    #endif

    #define OS_POSIX    1
    #define WAIT_TIMEOUT    258

    #if defined(__LP64__)
        #define OS_POSIX64    1
    #endif

    #if defined (__APPLE__)
        #include<TargetConditionals.h>
        #include <sys/stat.h>
        #include <sys/sockio.h>

        #define OS_APPLE    1

        #if (defined(TARGET_OS_IPHONE) && (TARGET_OS_IPHONE == 1))
            #define OS_IPHONE   1        
        #elif (defined(TARGET_OS_MAC) && (TARGET_OS_MAC == 1))
            #define OS_MAC   1
        #endif
    #endif

    #if defined(__SYMBIAN32__)
        #define OS_S60        1
    #endif

    #if defined(ANDROID)
        #define OS_ANDROID        1
    #endif
    
    #if ((defined(__arm__) || defined(__ARMEL__)) && defined(__linux__))
        #define OS_ARMLINUX        1
    #endif

    #ifndef CALLBACK
        #define CALLBACK
    #else
        #undef CALLBACK
        #define CALLBACK
    #endif

#else

    #error OS Not Implement Yet.

#endif    // end #if (defined(WIN32) || defined(_WIN32_WCE))