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diff --git a/sci-mathematics/normaliz/normaliz-3.1.2.ebuild b/sci-mathematics/normaliz/normaliz-3.1.2.ebuild
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+# Copyright 1999-2016 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=6
+
+inherit toolchain-funcs versionator
+
+MYP="Normaliz-${PV}"
+
+DESCRIPTION="Tool for computations in affine monoids and more"
+HOMEPAGE="www.mathematik.uni-osnabrueck.de/normaliz/"
+SRC_URI="https://github.com/Normaliz/Normaliz/archive/v${PV}.tar.gz"
+
+LICENSE="GPL-3"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~x86"
+IUSE="doc extras openmp"
+
+RDEPEND="
+	dev-libs/gmp[cxx]
+"
+DEPEND="${RDEPEND}
+	doc? ( app-text/texlive )
+	dev-libs/boost"
+# Only a boost header is needed -> not RDEPEND
+
+S=${WORKDIR}/${MYP}
+
+src_prepare () {
+	./bootstrap.sh || die
+	default
+}
+
+src_configure () {
+	if use openmp && ! tc-has-openmp ; then
+		die "You requested openmp, but your toolchain does not support it."
+	fi
+	econf $(use_enable openmp)
+}
+
+src_install() {
+	default
+	if use doc ; then
+		pushd doc
+		pdflatex Normaliz || die
+		pdflatex Normaliz || die
+		dodoc "Normaliz.pdf"
+		pdflatex NmzIntegrate || die
+		pdflatex NmzIntegrate || die
+		dodoc "NmzIntegrate.pdf"
+		popd
+	fi
+	if use extras; then
+		elog "You have selected to install extras which consist of Macaulay2"
+		elog "and Singular packages. These have been installed into "
+		elog "/usr/share/${PN}, and cannot be used without additional setup. Please refer"
+		elog "to the homepages of the respective projects for additional information."
+		elog "Note however, Gentoo's versions of Singular and Macaulay2 bring their own"
+		elog "copies of these interface packages. Usually you don't need normaliz's versions."
+		insinto "/usr/share/${PN}"
+		doins Singular/normaliz.lib
+		doins Macaulay2/Normaliz.m2
+	fi
+}