如何可靠地检测的Mac OS X，iOS设备的Linux时，Windows用C preprocessor？ [英] How to detect reliably Mac OS X, iOS, Linux, Windows in C preprocessor?

问题描述

如果有一些跨平台的C / C ++ code应该在Mac OS X，iOS的，Linux和Windows上编译，我怎么能在preprocessor过程中检测到它们可靠？

If there's some cross-platform C/C++ code that should be compiled on Mac OS X, iOS, Linux, Windows, how can I detect them reliably during preprocessor process?

推荐答案

有由大多数编译器使用predefined宏，你可以找到列表中的 [这里] 。 GCC编译器predefined宏可以发现 [这里] 。
下面是gcc的一个例子：

There are predefined macros that are used by most compilers, you can find the list [here]. GCC compiler predefined macros can be found [here]. Here is an example for gcc:

#ifdef _WIN32
   //define something for Windows (32-bit and 64-bit, this part is common)
   #ifdef _WIN64
      //define something for Windows (64-bit only)
   #endif
#elif __APPLE__
    #include "TargetConditionals.h"
    #if TARGET_IPHONE_SIMULATOR
         // iOS Simulator
    #elif TARGET_OS_IPHONE
        // iOS device
    #elif TARGET_OS_MAC
        // Other kinds of Mac OS
    #else
    #   error "Unknown Apple platform"
    #endif
#elif __linux__
    // linux
#elif __unix__ // all unices not caught above
    // Unix
#elif defined(_POSIX_VERSION)
    // POSIX
#else
#   error "Unknown compiler"
#endif

这个定义macroses取决于编译器，您要使用。

This defined macroses depends on compiler that you are going to use.

的 _WIN64 #IFDEF 可以嵌套到 _WIN32 #IFDEF ，因为 _WIN32 针对Windows，不仅在x86版本时定义。如果一些包括该prevents code复制是共同的。

The _WIN64 #ifdef can be nested into the _WIN32 #ifdef because _WIN32 is defined when targeting Windows, not only the x86 version. This prevents code duplication if some includes are common to both.

这篇关于如何可靠地检测的Mac OS X，iOS设备的Linux时，Windows用C preprocessor？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！