target_ compile_ features specified unknown feature “cxx_std_14“ for target

I use cmake When compiling a project , I just opened it to remind me that I need to upgrade cmake Version to 3.13, And my current computer is 3.7, So I opportunistic put CMakeLists.txt The version requirements in have been changed

#cmake_minimum_required(VERSION 3.14.1)
cmake_minimum_required(VERSION 3.6)

Then again, cmake Don't report cmake The low version is wrong , But the following error occurred

target_compile_features specified unknown feature "cxx_std_14" for target

In fact, this one doesn't need to be upgraded cmake, This can be understood as the old version cmake Unable to recognize new grammar , Just make the following changes .

add_definitions(-std=c++14)  # Add this line 
#target_compile_features(${LIBRARY_TARGET_NAME} PUBLIC cxx_std_14)  # Comment on this line