Interestingly, Encode::Newlines does it as follows: 
use constant Native => (
    ($^O =~ /^(?:MSWin|cygwin|dos|os2)/) ? CRLF :
    ($^O =~ /^MacOS/) ? CR : LF
);

[download]

I guess that this, which some special handling for VMS where the line ending is set by file and EDBCDI systems where line endings are the lesser problem, should cover 99% of the cases.

In reply to Re^2: Native newline encoding by salva
in thread Native newline encoding by salva

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