c++ - Visual C++ 中的 _32_ 和 _64_ 等价物

Question

我想在 Visual C 中定义 32(32 位编译)和 64(64 位编译)。是否有任何预定义的宏？我徒劳地搜索了 MSDN。

您认为 32 和 64 的这种定义可行吗？

#define _32_ if !(defined __LP64__ || defined __LLP64__) || defined _WIN32 && !defined _WIN64
        // we are compiling for a 32-bit system
the else statement will be _64_ definition
        // we are compiling for a 64-bit system

谢谢!

Answer 1

来自 the docs :

_M_IX86: Defined for x86 processors. ... This is not defined for x64 processors.

_M_X64: Defined for x64 processors.

_M_IA64: Defined for Itanium Processor Family 64-bit processors.

_WIN32: Defined for applications for Win32 and Win64. Always defined.

_WIN64: Defined for applications for Win64.

任你选。