No known features for CXX compiler "Clang"

[Xayah-Hina]

Fluid Engine can throw a error that prevent me from a successful build on my environment (MacOS big sur, clang 11, cmake 3.19.6)

adding this line in the root CMakeLists.txt may help! (I put this line under the cmake_minimum_required(...) line)

cmake_policy(SET CMP0025 NEW)

a subtle fix advice, best regards!

[utilForever]

@Xayahp Thanks for report! I'll investgate this issue. ✋

[utilForever]

@doyubkim CMP0025 in CMake is used for the policy to use compiler ID either AppleClang or Clang.
This policy was introduced in CMake version 3.0. However, our minimum version of CMake is 2.8.12.
What do you think about upgrading CMake version to 3?
Reference: https://cmake.org/cmake/help/latest/policy/CMP0025.html

[doyubkim]

I'm fine with 3.0. Let's make sure it is well documented in the readme and other docs.

[utilForever]

If you don't mind, I'll work on it and ready to PR within this week.

[doyubkim]

Sounds good to me!