sys-libs/gcompat: new package, add 1.1.0

Signed-off-by: Haelwenn (lanodan) Monnier <contact@hacktivis.me>

sys-libs/gcompat/gcompat-1.1.0.ebuild

@@ -0,0 +1,58 @@
+# Copyright 2018-2020 Haelwenn (lanodan) Monnier <contact@hacktivis.me>
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit multilib-minimal flag-o-matic
+
+DESCRIPTION="The GNU C Library compatibility layer for musl"
+HOMEPAGE="https://git.adelielinux.org/adelie/gcompat"
+KEYWORDS="~amd64 ~x86"
+LICENSE="UoI-NCSA"
+IUSE="libucontext obstack"
+SRC_URI="https://distfiles.adelielinux.org/source/${PN}/${P}.tar.xz"
+SLOT="0"
+
+DEPEND="
+	libucontext? ( sys-libs/libucontext )
+	obstack? ( sys-libs/obstack-standalone )
+"
+RDEPEND="${DEPEND}"
+
+get_loader_name() {
+	# Loosely based on Adélie APKBUILD
+	# TODO: Check against glibc’s logic
+
+	case "$ABI" in
+		x86) echo "ld-linux.so.2" ;;
+		amd64) echo "ld-linux-x86-64.so.2" ;;
+		arm*) echo "ld-linux-armhf.so.3" ;;
+		arm64) echo "ld-linux-aarch64.so.1" ;;
+		mips | powerpc | s390) echo "ld.so.1" ;;
+	esac
+}
+
+get_linker_path() {
+	local arch=$(ldd 2>&1 | sed -n '1s/^musl libc (\(.*\))$/\1/p')
+	echo "/lib/ld-musl-${arch}.so.1"
+}
+
+src_compile() {
+	filter-flags "-Wl,--as-needed"
+
+	emake \
+		LINKER_PATH="$(get_linker_path)" \
+		LOADER_NAME="$(get_loader_name)" \
+		WITH_OBSTACK="$(usex obstack 'obstack-standalone' 'no')" \
+		$(usex libucontext WITH_LIBUCONTEXT=yes '')
+}
+
+src_install() {
+	emake \
+		LINKER_PATH="$(get_linker_path)" \
+		LOADER_NAME="$(get_loader_name)" \
+		WITH_OBSTACK="$(usex obstack 'obstack-standalone' 'no')" \
+		$(usex libucontext WITH_LIBUCONTEXT=yes '') \
+		DESTDIR="${D}" \
+		install
+}