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diff --git a/dev-cpp/tiny-dnn/tiny-dnn-1.0.0_alpha3.ebuild b/dev-cpp/tiny-dnn/tiny-dnn-1.0.0_alpha3.ebuild
new file mode 100644
index 000000000000..7337dbcab8b5
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+++ b/dev-cpp/tiny-dnn/tiny-dnn-1.0.0_alpha3.ebuild
@@ -0,0 +1,84 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+DOCS_BUILDER="sphinx"
+DOCS_DEPEND="dev-python/recommonmark"
+DOCS_DIR="docs"
+MYPV="${PV/_alpha/a}"
+PYTHON_COMPAT=( python3_{7,8,9,10} )
+
+inherit cmake python-any-r1 docs
+
+DESCRIPTION="header only, dependency-free deep learning framework in C++14"
+HOMEPAGE="https://github.com/tiny-dnn/tiny-dnn"
+SRC_URI="https://github.com/${PN}/${PN}/archive/refs/tags/v${MYPV}.tar.gz -> ${P}.tar.gz"
+S="${WORKDIR}/${PN}-${MYPV}"
+LICENSE="BSD"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE="cpu_flags_x86_avx cpu_flags_x86_avx2 cpu_flags_x86_sse double-precision opencl openmp +serialization tbb test"
+REQUIRED_USE="
+	?? ( openmp tbb )
+"
+RESTRICT="test" #tests doesn't build ...
+
+# headers as rdepend because this is also an header only library
+RDEPEND="
+	opencl? (
+		dev-util/opencl-headers
+		virtual/opencl
+	)
+	serialization? ( dev-libs/cereal )
+	tbb? ( dev-cpp/tbb )
+"
+DEPEND="${RDEPEND}"
+BDEPEND="
+	test? ( dev-cpp/gtest )
+"
+
+PATCHES=(
+	"${FILESDIR}/${PN}-add-sphinx-ext-autodoc-to-conf-py.patch"
+	"${FILESDIR}/${PN}-disable-gtest-download.patch"
+)
+
+src_prepare() {
+	#remove bundled cereal
+	rm -r cereal || die
+	cmake_src_prepare
+}
+
+src_configure() {
+	local mycmakeargs=(
+		-DBUILD_DOCS=OFF
+		-DBUILD_EXAMPLES=OFF
+		-DCOVERALLS=OFF
+		-DUSE_LIBDNN=OFF
+		-DUSE_NNPACK=OFF
+
+		-DBUILD_TESTS=$(usex test)
+		-DUSE_AVX=$(usex cpu_flags_x86_avx)
+		-DUSE_AVX2=$(usex cpu_flags_x86_avx2)
+		-DUSE_DOUBLE=$(usex double-precision)
+		-DUSE_OMP=$(usex openmp)
+		-DUSE_OPENCL=$(usex opencl)
+		-DUSE_SERIALIZER=$(usex serialization)
+		-DUSE_SSE=$(usex cpu_flags_x86_sse)
+		-DUSE_TBB=$(usex tbb)
+	)
+	cmake_src_configure
+}
+
+src_compile() {
+	cmake_src_compile
+	docs_compile
+}
+
+src_install() {
+	cmake_src_install
+	if use doc; then
+		dodoc -r _build/html
+		docompress -x "/usr/share/doc/${PF}/html"
+	fi
+}