如果有其他选择 [英] cmake if else with option

问题描述

我在cmake中同时使用option和if-else时遇到问题.

I am with problem to use option together if-else in the cmake.

project(test)

option(TESTE "isso é um teste" OFF)

if(TESTE)
  message("true")
else()
  message("false")
endif()

add_executable(test main.cpp)

即使我在该选项上选择了OFF，它也始终显示true，这是什么意思?

It always display true even if I put OFF at the option, what am I doing wrong?

推荐答案

这是因为选项的值存储在缓存(CMakeCache.txt)中.

That's because the value of the option is stored in the cache (CMakeCache.txt).

如果您在CMakeLists中更改了 default 值，但 actual 值已经存储在缓存中，则只会从缓存中加载该值.

If you change the default value in the CMakeLists but the actual value is already stored in the cache, it will just load the value from the cache.

因此，要测试CMakeList中的逻辑，请在每次重新运行CMake之前每次都删除高速缓存.

So to test the logic in your CMakeLists, delete the cache each time before re-running CMake.

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