apparently perl-5.12.2 detects if gcc supports -fstack-protector and if so, enables it. it should not be doing this at all and instead should be letting the gcc profile take care of things.
Created attachment 256990 [details, diff] perl-no-ssp.patch until upstream gets around to fixing the issue, here is a simple patch we can incorporate into the ebuild
Fixed in 5.12.2-r5. Thanks.