I had to overide `S` in the ebuild to match the tarball extraction
directory. Other than that, this is the plain-vanilla g-cpan package.
--- /dev/null
+DIST MathML-Entities-0.17.tar.gz 53231 RMD160 43df54c7b6c2631344b571d242bf026e630a8c9a SHA1 9f40548bcb492bfe9889f76fd45abc1abd8cacce SHA256 b527be7300e3f8bbeaf6fb3283c850ad126f32cbf16cc571f9a5d9cf07c89da3
+EBUILD MathML-Entities-0.17.ebuild 766 RMD160 f8ee2869b603842ee1fd5fa3dd06b940781f21e2 SHA1 f55fab4c4d3e17ec7cfcffff5f8deae46338d884 SHA256 83181b8a4285da40d875870848086d2a691c66347b73c633a5bc8b5fc804dc3a
--- /dev/null
+# Copyright 1999-2010 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# This ebuild generated by g-cpan 0.16.0
+
+EAPI="2"
+
+MODULE_AUTHOR="DISTLER"
+
+inherit perl-module
+
+DESCRIPTION="Convert XHTML+MathML named entities"
+
+LICENSE="|| ( Artistic GPL-1 GPL-2 GPL-3 )"
+SLOT="0"
+KEYWORDS="alpha amd64 amd64-fbsd arm hppa ia64 m68k mips ppc ppc64 s390 sh sparc sparc-fbsd x86 x86-fbsd ppc-aix x86-freebsd x64-freebsd sparc64-freebsd hppa-hpux ia64-hpux x86-interix mips-irix amd64-linux arm-linux ia64-linux x86-linux ppc-macos x86-macos x64-macos m68k-mint x86-netbsd ppc-openbsd x86-openbsd x64-openbsd sparc-solaris sparc64-solaris x64-solaris x86-solaris x86-winnt x86-cygwin"
+IUSE=""
+
+DEPEND="dev-lang/perl"
+
+S="${WORKDIR}/${PN}"