Claus Klein

**IMHO**: this should no a problem to do so. CMake may be easily installed or updated from [pypi](https://pypi.org/project/cmake/)

In general, I would prefer the ranged version of ```cmake cmake_minimum_required(VERSION [...]) ``` See too https://cmake.org/cmake/help/latest/manual/cmake-policies.7.html#policies-introduced-by-cmake-3-20

I will try to check this

@Orphis would you like to review this PR?

see too https://github.com/boostorg/container/pull/220

see too https://github.com/Orphis/boost-cmake/pull/111

see too https://github.com/Orphis/boost-cmake/pull/111

Hi Viktor, I’m sorry, but there are still some: Claus-MBP:doctest clausklein$ egrep -w '(error|warning)' run-clang-tidy.log | sort -u /Users/clausklein/Workspace/cpp/doctest/doctest/parts/doctest.cpp:1512:9: error: macro is not used [clang-diagnostic-unused-macros] /Users/clausklein/Workspace/cpp/doctest/doctest/parts/doctest_fwd.h:802:31: warning: initialization of 'value'...

I found this blog usefully: https://www.kdab.com/clang-tidy-part-1-modernize-source-code-using-c11c14/ and the py script is from there: https://github.com/llvm-mirror/clang-tools-extra/blob/master/clang-tidy/tool/run-clang-tidy.py On debian, it was installed with clang-tidy, but with different name. And it needs py yaml...

IMOH It would be a good idea to add a `.clang-tidy `config file to the source tree root dir. I have tried to extract one from your travis configuration, but...