如何添加最低编译器版本要求? [英] How can I add a minimum compiler version requisite?

问题描述

我想用 C++11 创建一个项目，我使用 CMake 作为我的构建系统.

I want to create a project in C++11 and I use CMake as my build system.

如何在 CMake 配置文件中添加最低编译器版本要求?

How can I add a minimum compiler version requisite in the CMake config files?

推荐答案

AFAIK，没有内置支持这样的东西，但你当然可以自己写:

AFAIK, there is no built-in support for something like this, but you could certainly write it yourself:

if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
  if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "your.required.gcc.version")
    message(FATAL_ERROR "Insufficient gcc version")
  endif()
elseif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
  if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "your.required.msvc.version")
    message(FATAL_ERROR "Insufficient msvc version")
  endif()
elseif(...)
# etc.
endif()

但是，我建议您实际上考虑使用特征检测方法.也就是说，使用 try_compile() 来验证编译器是否支持您需要的功能，如果不支持，请使用 FATAL_ERROR.它在 CMake 中更为惯用，并且具有额外的好处，您无需为所有编译器找到合适的最小版本.

However, I suggest you actually consider a feature-detection approach instead. That is, use try_compile() to verify that the compiler supports the features you need, and FATAL_ERROR if it doesn't. It's more idiomatic in CMake, and has the added benefit you don't have to discover the appropriate minimal version for all compilers out there.

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