app-admin/ananicy-cpp: Add support for Clang compilation and eBPF implementation

Signed-off-by: Alberto Gireud <agireud@protonmail.com>

app-admin/ananicy-cpp/ananicy-cpp-1.1.1-r3.ebuild

@@ -0,0 +1,83 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit cmake
+
+DESCRIPTION="Ananicy rewritten in C++ for much lower CPU and memory usage"
+HOMEPAGE="https://gitlab.com/ananicy-cpp/ananicy-cpp"
+LICENSE="GPL-3"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE="bpf clang systemd"
+REQUIRED_USE="
+	bpf? ( clang )
+"
+
+SRC_URI="https://gitlab.com/ananicy-cpp/ananicy-cpp/-/archive/v${PV}/${PN}-v${PV}.tar.bz2"
+S="${WORKDIR}/${PN}-v${PV}"
+
+RDEPEND="
+	!app-admin/ananicy
+	>=dev-cpp/nlohmann_json-3.9
+	>=dev-libs/libfmt-8
+	>=dev-libs/spdlog-1.9
+	bpf? (
+		 dev-libs/elfutils
+		 dev-libs/libbpf
+		 dev-util/bpftool
+	)
+	systemd? ( sys-apps/systemd )
+"
+
+DEPEND="
+	>=dev-build/cmake-3.17
+	clang? ( >=sys-devel/clang-10 )
+	${RDEPEND}
+"
+
+PATCHES=(
+	"${FILESDIR}/${P}-remove-debug-flags.patch"
+)
+
+pkg_setup() {
+	if use bpf ; then
+		CONFIG_CHECK+="~BPF ~BPF_EVENTS ~BPF_SYSCALL ~HAVE_EBPF_JIT"
+	fi
+}
+
+src_configure() {
+	local mycmakeargs=(
+		-DENABLE_SYSTEMD=$(usex systemd)
+		-DUSE_BPF_PROC_IMPL=$(usex bpf)
+		-DUSE_EXTERNAL_FMTLIB=ON
+		-DUSE_EXTERNAL_JSON=ON
+		-DUSE_EXTERNAL_SPDLOG=ON
+		-DVERSION=${PV}
+	)
+
+	if use clang; then
+		local version_clang=$(clang --version 2>/dev/null | grep -F -- 'clang version' | awk '{ print $3 }')
+		[[ -n ${version_clang} ]] && version_clang=$(ver_cut 1 "${version_clang}")
+		[[ -z ${version_clang} ]] && die "Failed to read clang version!"
+		CC=${CHOST}-clang-${version_clang}
+		CXX=${CHOST}-clang++-${version_clang}
+
+		if use bpf ; then
+			mycmakeargs+=( -DBPF_BUILD_LIBBPF=OFF )
+		fi
+	fi
+
+	cmake_src_configure
+}
+
+src_install() {
+	cmake_src_install
+
+	if ! use systemd ; then
+		doinitd "${FILESDIR}/${PN}.initd"
+	fi
+
+	keepdir /etc/ananicy.d
+}