sys-libs/libucontext: initial import

Signed-off-by: Sam James <sam@gentoo.org>

sys-libs/libucontext/Manifest

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+DIST libucontext-1.1.tar.gz 25261 BLAKE2B 269b3899657779bc2c6a2f1c365242f0ee936afeb0acf74e48af5c1e6b96918bbaa239039508e7b1b1f7b358679fb4a222311b761223b69b9a3e7a9be2d0bc40 SHA512 05aed6f82a2b3d9dba896423335a7fc2fc5eddc87ed725f05e14488c6ddfcef10b835c928619439c7783e052baff7ef2dc162b6e06aa78992f6f611ca13c2e39

sys-libs/libucontext/libucontext-1.1.ebuild

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+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit toolchain-funcs
+
+DESCRIPTION="ucontext implementation featuring glibc-compatible ABI"
+HOMEPAGE="https://github.com/kaniini/libucontext"
+SRC_URI="https://github.com/kaniini/libucontext/archive/refs/tags/${P}.tar.gz"
+S="${WORKDIR}"/${PN}-${P}
+
+LICENSE="ISC"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE="+man"
+
+BDEPEND="man? ( app-text/scdoc )"
+
+# segfault needs investigation
+RESTRICT="test"
+
+src_compile() {
+	tc-export AR CC
+
+	emake CFLAGS="${CFLAGS}" LDFLAGS="${LDFLAGS}"
+}
+
+src_test() {
+	emake CFLAGS="${CFLAGS}" LDFLAGS="${LDFLAGS}" check
+}
+
+src_install() {
+	emake DESTDIR="${ED}" LIBDIR="/usr/$(get_libdir)" install
+
+	if use man ; then
+		emake DESTDIR="${ED}" LIBDIR="/usr/$(get_libdir)" install_docs
+	fi
+}

sys-libs/libucontext/metadata.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="project">
+		<email>musl@gentoo.org</email>
+		<name>Musl project</name>
+	</maintainer>
+	<upstream>
+		<remote-id type="github">kaniini/libucontext</remote-id>
+	</upstream>
+</pkgmetadata>