Probably this has already been sorted out, but for the sake of completeness,
-- you cannot not link with system libraries statically on mac, till you do some extra work of compiling crt0.o.
So, simply remove this flag.
Please see
stackoverflow.com/questions/5259249/creating-static-mac-os-x-c-build
https://developer.apple.com/library/mac/qa/qa1118/_index.html