[cmake] Third-party tools C++ standard requirements

Hi all,

A bug was recently opened on IWYU where the reporter was packaging IWYU for Homebrew on Mac [1]. For some reason, their Apple Clang system compiler defaulted to a C++ standard that fails to parse the LLVM headers (details in the first page of the bug report) – from cursory inspection it looks like c++03.

I wonder if there should be a way for LLVM’s CMake package to announce its ‘-std’ requirements to embedders? We could add an explicit ‘-std’ switch in IWYU’s build system, of course, but I figured this might be a recurring problem for tools.

Any thoughts?

Thanks,

  • Kim

[1] https://github.com/include-what-you-use/include-what-you-use/issues/867