有没有办法为 FetchContent 目标获取 -isystem？

Question

NO_SYSTEM_FROM_IMPORTED tells us that IMPORTED targets automagically get -isystem. Does that also hold for targets introduced to the project with FetchContent?

如果不是（我假设是因为在获取的目标上有 clang-tidy 警告问题），获得此类目标的 -isystem 的最佳方法是什么？

Answer 1

其实很简单（感谢@Tsyvarev）：

include (FetchContent)

set (FETCHCONTENT_QUIET FALSE)

FetchContent_Declare (
  Catch2
  GIT_REPOSITORY https://github.com/catchorg/Catch2.git
  GIT_TAG v2.4.2
  GIT_PROGRESS TRUE
)

FetchContent_MakeAvailable (Catch2)

### here is what makes all include directories -isystem
get_target_property(CATCH2_IID Catch2 INTERFACE_INCLUDE_DIRECTORIES)
set_target_properties(Catch2 PROPERTIES INTERFACE_SYSTEM_INCLUDE_DIRECTORIES "${CATCH2_IID}")

有没有办法为 FetchContent 目标获取 -isystem？

Is there a way to get -isystem for FetchContent targets?

cmake

include

clang-tidy