ld xattr hooks

binutils

post_src_install() {
	local -; set +o monitor -o pipefail
	typeset k e r=${EROOT%%+(/)} cpn=${CATEGORY}/${PN}
	e=${r:+${r}/}${ED%%+(/)} 
	
	typeset -A base=(
		[sys-devel/binutils]=bfd
		[sys-devel/mold]=mold
		[llvm-core/lld]=lld
	)

	typeset -A xattr=(
		[user.ld]=ld.${base[$cpn]}
		[user.ctarget]=${CTARGET:-$CHOST}
		[user.gentoo-package]=$cpn
	)

	typeset -A target=(
		[sys-devel/binutils]=${e}/usr/${CTARGET:-${CHOST}}/${PN}-bin/${PV}
		[sys-devel/mold]=${e}/usr/bin
		[llvm-core/lld]=${e}/usr/lib/llvm/${LLVM_MAJOR:-${SLOT}}/bin
	)
	
	[[ -e ${target[$cpn]}/${xattr[user.ld]} ]] || die

	case $cpn in
		llvm-core/lld)
			ln -nfv -- "${target[$cpn]}/ld"{.lld,}                                       | einfo "$(</proc/self/fd/0)" || die # hardlink ld to ld.lld
			ln -snv -- ld.lld "${target[$cpn]}/${xattr[user.ctarget]}-${xattr[user.ld]}" | einfo "$(</proc/self/fd/0)" || die # add ${CHOST}-ld.lld symlink
	esac

	einfo "Adding xattrs for ${base[$cpn]}..."
	for k in "${!xattr[@]}"; do
		einfo "${| printf -v REPLY '%s=%q => %#q' "$k" "${xattr[$k]}" "${target[$cpn]}/${xattr[user.ld]}"; }"
		setfattr --raw -n "$k" -v "${xattr[$k]}" -- "${target[$cpn]}/${xattr[user.ld]}" || die
	done
}

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