如何使用cmake检测64位MSVC?

问题描述

我有一个使用cmake的项目，一个目标设置为仅使用MSVC构建:

I have a project which uses cmake, one target is set to only build with MSVC:

 if (MSVC)
     add_library(test SHARED source.cpp)
 endif()

现在，另一个问题是该目标仅适用于32位MSVC.那么如何检测生成器为MSVC64并跳过此目标?

Now the other issue is that this target is only designed for MSVC 32bit. So how can I detect that the generator is MSVC64 and skip this target?

推荐答案

CMake本身也使用几种方法来检查不是64位":

There are several ways - also used by CMake itself - that will check for "not 64Bit":

if(NOT "${CMAKE_GENERATOR}" MATCHES "(Win64|IA64)")
    ...
endif()

if("${CMAKE_SIZEOF_VOID_P}" STREQUAL "4")
    ...
endif()

if(NOT CMAKE_CL_64)
   ...
endif()

参考

• CMAKE_GENERATOR
• CMAKE_SIZEOF_VOID_P
• CMAKE_CL_64

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