diff --git a/dev-cpp/dtl/Manifest b/dev-cpp/dtl/Manifest
index 1bfa96ce00..8566de94c0 100644
--- a/dev-cpp/dtl/Manifest
+++ b/dev-cpp/dtl/Manifest
@@ -1 +1,2 @@
 DIST dtl-1.19_p20210531.tar.gz 26011 BLAKE2B 1ac4194cf536c072c45c2e2da0f0fd26232a5bf2e7aa57e8323457b5d43222df6a8579a41e54cd941cc69e013d4dac9fd051ad33950ed89692629ef57564a5f6 SHA512 2ac1f3d9871ed39f4183ebf0d9d8a1381ef2dacc3677f525d025eb292fbf4676a5a67abe34dfa1ff12bdb66e0fa71a83b8a99130e2e8048e08d3392327e84a9a
+DIST dtl-1.20.tar.gz 26227 BLAKE2B a52f1e8878b0bbd7204d979eaf0ba303722140c5f57259dc8592a50f0f039baa3a90c1d309ac089805736a383e9265cbd133289216fe85aaac677265a29303d2 SHA512 44cdaf190d8a103effbca8df244c652b642590795f7307f5f7fdf64fc34bdbe2fa5ab2e1a08185abf099e35b0d9158306a80a8dc24bba9eccab4c77c7b1eed5e
diff --git a/dev-cpp/dtl/dtl-1.20.ebuild b/dev-cpp/dtl/dtl-1.20.ebuild
new file mode 100644
index 0000000000..f2b82a83b0
--- /dev/null
+++ b/dev-cpp/dtl/dtl-1.20.ebuild
@@ -0,0 +1,53 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{8..11} pypy3 )
+
+inherit python-any-r1 scons-utils toolchain-funcs
+
+DESCRIPTION="diff template library written by C++"
+HOMEPAGE="https://github.com/cubicdaiya/dtl"
+SRC_URI="https://github.com/cubicdaiya/dtl/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="BSD"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE="examples test"
+
+DEPEND="test? ( dev-cpp/gtest )"
+
+RESTRICT="!test? ( test )"
+PATCHES=( "${FILESDIR}/${PN}-1.19_p20210531-do-not-append-O2.patch" )
+
+src_compile() {
+	escons CC="$(tc-getCC)"
+	if use test; then
+		pushd test || die
+		escons CC="$(tc-getCC)"
+		popd || die
+	fi
+	if use examples; then
+		pushd examples || die
+		escons CC="$(tc-getCC)"
+		popd || die
+	fi
+}
+
+src_install() {
+	escons prefix="${T}" install
+	insinto /usr/include/dtl
+	doins "${T}/dtl/include"/*
+	if use examples; then
+		pushd examples || die
+		rm SConstruct *.o *.cpp *.hpp || die
+		exeinto /usr/libexec/dtl/examples
+		doexe *
+	fi
+}
+
+src_test() {
+	pushd test || die
+	escons check
+}
diff --git a/dev-cpp/dtl/metadata.xml b/dev-cpp/dtl/metadata.xml
index 4f8e72c5c4..11bb767804 100644
--- a/dev-cpp/dtl/metadata.xml
+++ b/dev-cpp/dtl/metadata.xml
@@ -5,4 +5,12 @@
 		<email>lssndrbarbieri@gmail.com</email>
 		<name>Alessandro Barbieri</name>
 	</maintainer>
+	<upstream>
+		<maintainer>
+			<name>Tatsuhiko Kubo</name>
+			<email>cubicdaiya@gmail.com</email>
+		</maintainer>
+		<bugs-to>https://github.com/cubicdaiya/dtl/issues</bugs-to>
+		<remote-id type="github">cubicdaiya/dtl</remote-id>
+	</upstream>
 </pkgmetadata>