--- /dev/null
+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit toolchain-funcs
+
+DESCRIPTION="Manifest generation and verification tool written in C"
+HOMEPAGE="https://prefix.gentoo.org/"
+GITHASH="7fc3cf2b4baddc8b98c994b8ee024330d8f29956"
+SRC_URI="https://gitweb.gentoo.org/repo/proj/prefix.git/plain/scripts/rsync-generation/hashgen.c?id=${GITHASH} -> ${P}.c"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~ppc64 ~x64-macos ~sparc-solaris ~x64-solaris"
+IUSE="+openmp"
+
+DEPEND="
+ openmp? (
+ || ( >=sys-devel/gcc-4.2:*[openmp] sys-devel/clang-runtime:*[openmp] )
+ )
+ app-crypt/libb2
+ dev-libs/openssl:*
+ sys-libs/zlib
+ app-crypt/gpgme
+"
+RDEPEND="${DEPEND}"
+
+src_unpack() {
+ mkdir "${S}" || die
+ cp "${DISTDIR}"/${P}.c "${S}"/${PN}.c || die
+}
+
+src_compile() {
+ v() {
+ echo "$@"
+ "$@"
+ }
+
+ local openmp=
+ use openmp && tc-has-openmp && openmp=-fopenmp
+
+ v $(tc-getCC) -o hashgen ${openmp} ${CFLAGS} \
+ $(pkg-config openssl --libs) \
+ $(gpgme-config --libs) \
+ -lb2 -lz ${LDFLAGS} ${PN}.c || die
+}
+
+src_install() {
+ dobin hashgen
+ cd "${ED}"/usr/bin || die
+ ln -s hashgen hashverify || die
+}
--- /dev/null
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+ <maintainer type="person">
+ <email>grobian@gentoo.org</email>
+ <name>Fabian Groffen</name>
+ </maintainer>
+</pkgmetadata>