diff --git a/sys-cluster/TCL/Manifest b/sys-cluster/TCL/Manifest
new file mode 100644
index 0000000000..6fb55fba5f
--- /dev/null
+++ b/sys-cluster/TCL/Manifest
@@ -0,0 +1 @@
+DIST TCL-1.0.tar.gz 26572 BLAKE2B d36d7f1f406b141358e803b00c0f8abb6eede322e69cae9d99f3e5e8edeba40035cb88549d72e0d6f53048fb29c5ed8dc942286660f50da9e7f6f13a3a266902 SHA512 abc3eea6926501431295af3e88a870ef0da29301a34b71a4c00fcc22fe4e132a6377aeae45281254f9f5e3a99124f595e2e371ee7fc058c4830e58d4077a9793
diff --git a/sys-cluster/TCL/TCL-1.0.ebuild b/sys-cluster/TCL/TCL-1.0.ebuild
new file mode 100644
index 0000000000..01ad7ac5c6
--- /dev/null
+++ b/sys-cluster/TCL/TCL-1.0.ebuild
@@ -0,0 +1,70 @@
+# Copyright 2019-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit autotools
+
+DESCRIPTION="Transparent Checkpointing Library"
+HOMEPAGE="https://github.com/bsc-pm/TCL"
+SRC_URI="https://github.com/bsc-pm/TCL/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz"
+#S="${WORKDIR}/${PN}-version-${PV}"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE="debug fti instrumentation scr veloc"
+
+RDEPEND="
+	virtual/mpi
+
+	fti? ( sys-cluster/fti )
+	scr? ( sys-cluster/scr )
+	veloc? ( sys-cluster/veloc )
+"
+DEPEND="${RDEPEND}"
+REQUIRED_USE="|| ( fti scr veloc )"
+
+src_prepare() {
+	default
+	eautoreconf
+}
+
+src_configure() {
+	local myconf=(
+		--disable-static
+		--enable-shared
+		--includedir="${EPREFIX}/usr/include/TCL"
+		--with-mpi="${EPREFIX}/usr"
+
+		$(use_enable debug)
+		$(use_enable instrumentation)
+	)
+
+	if use fti; then
+		myconf+=( "--with-fti=${EPREFIX}/usr" )
+	else
+		myconf+=( "--without-fti" )
+	fi
+	if use instrumentation; then
+		myconf+=( $(use_enable instrumentation-debug debug) )
+	fi
+	if use scr; then
+		myconf+=( "--with-scr=${EPREFIX}/usr" )
+	else
+		myconf+=( "--without-scr" )
+	fi
+	if use veloc; then
+		myconf+=( "--with-veloc=${EPREFIX}/usr" )
+	else
+		myconf+=( "--without-veloc" )
+	fi
+
+	econf "${myconf[@]}"
+}
+
+src_install() {
+	default
+	dodoc NEWS AUTHORS INSTALL
+        find "${ED}" -name '*.la' -delete || die
+}
diff --git a/sys-cluster/TCL/metadata.xml b/sys-cluster/TCL/metadata.xml
new file mode 100644
index 0000000000..c3967643fc
--- /dev/null
+++ b/sys-cluster/TCL/metadata.xml
@@ -0,0 +1,18 @@
+<?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>
+		<bugs-to>https://github.com/bsc-pm/TCL/issues</bugs-to>
+		<remote-id type="github">bsc-pm/TCL</remote-id>
+	</upstream>
+	<use>
+		<flag name="fti">Enable <pkg>sys-cluster/fti</pkg> backend</flag>
+		<flag name="instrumentation">Build the instrumentation version</flag>
+		<flag name="scr">Enable <pkg>sys-cluster/scr</pkg> backend</flag>
+		<flag name="veloc">Enable <pkg>sys-cluster/veloc</pkg> backend</flag>
+	</use>
+</pkgmetadata>