Logged this on savannah, for another groff problem. https://savannah.gnu.org/bugs/index.php?32301 New patch attached and needs updating for the ebuild. Thanks.
Created attachment 261218 [details, diff] include libgnu when linking
This would probably also fix bug #353595
Saving the patch into files/ and adding the following line to the ebuild works for me indeed: epatch "${FILESDIR}"/groff-1.21-gnulib.patch
confirmed working on max os x 10.4 additional epatch just in fron of the eautoreconf.
patch added, thanks
*** Bug 353595 has been marked as a duplicate of this bug. ***