get_filename_component REALPATH may have different case than file REAL_PATH

OS: Windows

get_filename_component(out ${path} REALPATH) returns the file name as it is on disk (if it exists) even if ${path} case differs.
file(REAL_PATH ${path} out) always returns the filename as given in the original variable ${path}, not as it is on disk.
The docs state that REALPATH is offered by file(REAL_PATH) but the results are not the same.

Is the above behavior of get_filename_component(... REALPATH) intentional, or just an accident?

Edited Mar 15, 2023 by Balázs Oroszi

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