diff --git a/sys-cluster/rankstr/Manifest b/sys-cluster/rankstr/Manifest
new file mode 100644
index 0000000000..49b1c2ed12
--- /dev/null
+++ b/sys-cluster/rankstr/Manifest
@@ -0,0 +1 @@
+DIST rankstr-0.0.2.tar.gz 10290 BLAKE2B 4efa609804bffd0fe9215e9b06112615ed85657af88bd15e1a51a5db7ccc8701bf162ea88096df69a42ecd062e3099e5c18986d72fd8c5cc14b89fd019b3322d SHA512 fd4814ec797566004c3141b46b4ca410e217857e2bee3dc3b0f350c2c10fcaff62e3608fb0233894a0960aade660f55a536ea7cc41c9aed3a355b3a05f432a0f
diff --git a/sys-cluster/rankstr/metadata.xml b/sys-cluster/rankstr/metadata.xml
new file mode 100644
index 0000000000..d2422a7957
--- /dev/null
+++ b/sys-cluster/rankstr/metadata.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+  <maintainer type="person">
+    <email>lssndrbarbieri@gmail.com</email>
+    <name>Alessandro Barbieri</name>
+  </maintainer>
+  <upstream>
+    <remote-id type="github">ECP-VeloC/rankstr</remote-id>
+  </upstream>
+  <longdescription lang="en">The rankstr (rank string) library provides functions that identify unique strings across an MPI communicator.
+
+A key use case is to split a communicator into subcommunicators such that all processes in a resulting subcommunicator consist of those processes that provided an identical input string. rankstr_mpi_comm_split is a function like MPI_Comm_split, but it takes a variable-length string as the color argument insead of an integer value.
+
+The rankstr_mpi function does not output a communicator, but instead returns a unique integer for each unique string.
+
+For scalability, the implementation uses a distributed, bitonic sort via point-to-point messages over the input communicator to compare string values. The caller must provide two distinct tag values that are safe for the function to use for its point-to-point messages.
+  </longdescription>
+</pkgmetadata>
diff --git a/sys-cluster/rankstr/rankstr-0.0.2.ebuild b/sys-cluster/rankstr/rankstr-0.0.2.ebuild
new file mode 100644
index 0000000000..ffe57a9bb3
--- /dev/null
+++ b/sys-cluster/rankstr/rankstr-0.0.2.ebuild
@@ -0,0 +1,38 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI="7"
+
+inherit cmake-utils
+
+DESCRIPTION="Split an MPI communicator into subcomms based on string values"
+HOMEPAGE="https://github.com/ECP-VeloC/rankstr"
+SRC_URI="https://github.com/ECP-VeloC/${PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE="mpi test"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	mpi? ( virtual/mpi )
+"
+DEPEND="${RDEPEND}"
+BDEPEND="
+	>=dev-util/cmake-2.8
+"
+
+src_prepare() {
+	#do not build static library
+	sed -i '/rankstr-static/d' src/CMakeLists.txt || die
+	default
+	cmake-utils_src_prepare
+}
+
+src_configure() {
+	local mycmakeargs=(
+		-DMPI="$(usex mpi "" OFF)"
+	)
+	cmake-utils_src_configure
+}