dev-libs/s2n: add 1.5.21

Signed-off-by: KotoishiHeart <trakrailysurely@danceylove.net>
Part-of: https://github.com/gentoo/guru/pull/331
Signed-off-by: KotoishiHeart <trakrailysurely@danceylove.net>

dev-libs/s2n/s2n-1.5.21.ebuild

@@ -0,0 +1,32 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit cmake
+
+DESCRIPTION="Simple, small, fast and secure C99 implementation of the TLS/SSL protocols"
+HOMEPAGE="https://github.com/awslabs/s2n"
+SRC_URI="https://github.com/awslabs/${PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE="test"
+
+RESTRICT="!test? ( test )"
+
+DEPEND="
+	dev-libs/openssl:=
+"
+RDEPEND="${DEPEND}"
+
+S="${WORKDIR}/${PN}-tls-${PV}"
+
+src_configure() {
+	local mycmakeargs=(
+		-DBUILD_TESTING=$(usex test)
+		-DUNSAFE_TREAT_WARNINGS_AS_ERRORS=OFF
+	)
+	cmake_src_configure
+}