dev-cpp/cpp-taskflow: adding package

Package-Manager: Portage-2.3.99, Repoman-2.3.22
RepoMan-Options: --force
Signed-off-by: Michele Santullo <m.santullo@posteo.net>

dev-cpp/cpp-taskflow/cpp-taskflow-2.4.0.ebuild

@@ -0,0 +1,39 @@
+# Copyright 2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit cmake
+
+DESCRIPTION="Modern C++ Parallel Task Programming"
+HOMEPAGE="https://cpp-taskflow.github.io"
+if [[ ${PV} == 9999 ]]; then
+	EGIT_REPO_URI="https://github.com/cpp-taskflow/${PN}.git"
+	inherit git-r3
+	KEYWORDS=""
+else
+	SRC_URI="https://github.com/cpp-taskflow/${PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+	KEYWORDS="~amd64 ~x86"
+fi
+
+LICENSE="MIT"
+SLOT="0"
+IUSE="test"
+
+DEPEND=""
+RDEPEND="${DEPEND}"
+BDEPEND=""
+RESTRICT="!test? ( test )"
+
+PATCHES=(
+	"${FILESDIR}"/${P}-optional-tests-examples.patch
+	"${FILESDIR}"/${P}-fix-lib-path.patch
+	"${FILESDIR}"/${P}-fix-version-number.patch
+)
+
+src_configure() {
+	local mycmakeargs=(
+		-DTF_BUILD_TESTS=$(usex test ON OFF)
+	)
+	cmake_src_configure
+}