--- /dev/null
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+ <herd>ml</herd>
+ <use>
+ <flag name="mpir">Use MPIR library instead of GMP.</flag>
+ </use>
+</pkgmetadata>
--- /dev/null
+# Copyright 1999-2012 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+inherit findlib eutils
+
+DESCRIPTION="Arithmetic and logic operations over arbitrary-precision integers"
+HOMEPAGE="https://forge.ocamlcore.org/projects/zarith/"
+SRC_URI="https://forge.ocamlcore.org/frs/download.php/1471/${P}.tgz"
+
+LICENSE="LGPL-2.1-with-linking-exception"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE="doc mpir +ocamlopt"
+
+RDEPEND="
+ >=dev-lang/ocaml-4:=[ocamlopt?]
+ !mpir? ( dev-libs/gmp:0= )
+ mpir? ( sci-libs/mpir )"
+
+DEPEND="${RDEPEND} dev-lang/perl"
+
+src_configure() {
+ ./configure -host "${CHOST}" \
+ -ocamllibdir "/usr/$(get_libdir)" \
+ -installdir "${ED}/usr/$(get_libdir)/ocaml" \
+ $(usex mpir "-mpir" "-gmp") || die
+}
+
+src_compile() {
+ emake HASOCAMLOPT=$(usex ocamlopt yes no) HASDYNLINK=$(usex ocamlopt yes no) all
+ use doc && emake doc
+}
+
+src_test() {
+ emake HASOCAMLOPT=$(usex ocamlopt yes no) HASDYNLINK=$(usex ocamlopt yes no) tests
+}
+
+src_install() {
+ findlib_src_preinst
+ emake HASOCAMLOPT=$(usex ocamlopt yes no) HASDYNLINK=$(usex ocamlopt yes no) install
+ dodoc Changes README
+ use doc && dohtml html/*
+}