Fedora has patch for lcms2 support: http://pkgs.fedoraproject.org/cgit/xsane.git/tree/xsane-0.999-lcms2.patch
+*xsane-0.999-r1 (02 Aug 2014) + + 02 Aug 2014; Pacho Ramos <pacho@gentoo.org> +files/xsane-0.999-lcms2.patch, + +xsane-0.999-r1.ebuild, -xsane-0.998-r1.ebuild: + Support lcms2 (#517642 by Nikoli) +