Get compile time string of dmd command line options "-os" & "-target"

[An Pham via Digitalmars-d-learn]

pragma(msg, os.stringof...?);
pragma(msg, target.stringof...?);

what is use case for this? mixin & import

    Long list of version.....
    version(Windows)
        mixin(import("foo_windows.enum."));
    else version(AArch64)
        mixin(import("foo_aarch64.enum"));
    else
        static assert(0);

Shorter with one line
mixin(import("foo_" ~ os.stringof ~ ".enum."));
mixin(import("foo_" ~ target.stringof ~ ".enum."));