[CMake] CXX_STANDARD use latest

[Tiago Macarios]

Hi,

One can require a specific CXX_STANDARD to be used, but is it possible to
set a minimum and let CMake use the latest as long as it satisfies the
minimum?

Example code:

set_property(TARGET a_lib
    PROPERTY CXX_STANDARD_MIN 11
    PROPERTY CXX_STANDARD_REQUIRED ON
    PROPERTY CXX_STANDARD_LATEST ON
)

Tiago
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