I can suggest trying: 

$ perl -se 'print $foo,$/' -- -foo=bar
bar

[download]
I kind of extrapolated this from the perlrun docs, and, although I kinda can see it (perl trying to figure out where its arguements stop and yours start), it definitely doesn't do what I expect based on it being able to figure this out just fine when not using the -s flag.

In reply to Re: -s switch with -e by Tanktalus
in thread -s switch with -e by jcc

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