Created attachment 381766 [details] build log app-arch/tar-1.28 fails to build on OS X because it is not respecting -xattr.
Created attachment 381768 [details] emerge info
Created attachment 381770 [details] emerge pqv
A simple workaround is to move /usr/include/sys/xattr.h somewhere else while building tar-1.28. For instance, sudo mv /usr/include/sys/xattr.h /usr/include/sys/xattr.h.disabled emerge tar sudo mv /usr/include/sys/xattr.h.disabled /usr/include/sys/xattr.h Or you can mask tar-1.28 echo '=app-arch/tar-1.28' >> etc/portage/package.mask
SΩame issue on Mac OS X Yosemite, masking provides a proper workaround.
Same on Lion
masked on OSX at last