导致CMAKE产生错误 [英] Cause CMAKE to generate an error

问题描述

如何让CMAKE在特定条件下产生错误。也就是说，我想要这样的东西：

How can I get CMAKE to generate an error on a particular condition. That is, I want something like this:

if( SOME_COND )
  error( "You can't do that" )
endif()

推荐答案

a href =https://cmake.org/cmake/help/v2.8.8/cmake.html#command%3amessage> message（）方法具有该类型的可选参数，允许STATUS，WARNING， AUTHOR_WARNING，SEND_ERROR和FATAL_ERROR。

The message() method has an optional argument for the type, allowing STATUS, WARNING, AUTHOR_WARNING, SEND_ERROR and FATAL_ERROR.

如果您想要输出错误，则需要SEND_ERROR，但继续处理。
如果你想退出CMake处理，你想要FATAL_ERROR。

You want SEND_ERROR if you want to output an error, but continue processing. You want FATAL_ERROR if you want to exit CMake processing.

像：

if( SOME_COND )
  message( SEND_ERROR "You can't do that" )
elsif( SOME_CRITICAL_COND )
  message( FATAL_ERROR "You can not do this at all, CMake will exit." )
endif()

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