flag-o-matic.eclass: SUPPORTED_EAPIS: 5,6,7; drop eutils, multilib

- eutils was only used for eqawarn in old EAPI
- multilib usage unknown, but is inherited by toolchain-funcs anyway

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

eclass/flag-o-matic.eclass

@@ -1,18 +1,27 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: flag-o-matic.eclass
 # @MAINTAINER:
 # toolchain@gentoo.org
+# @SUPPORTED_EAPIS: 5 6 7
 # @BLURB: common functions to manipulate and query toolchain flags
 # @DESCRIPTION:
 # This eclass contains a suite of functions to help developers sanely
 # and safely manage toolchain flags in their builds.
 
+case ${EAPI:-0} in
+	0|1|2|3|4) die "flag-o-matic.eclass: EAPI ${EAPI} is too old." ;;
+	5|6|7) ;;
+	*) die "EAPI ${EAPI} is not supported by flag-o-matic.eclass." ;;
+esac
+
 if [[ -z ${_FLAG_O_MATIC_ECLASS} ]]; then
 _FLAG_O_MATIC_ECLASS=1
 
-inherit eutils toolchain-funcs multilib
+inherit toolchain-funcs
+
+[[ ${EAPI} == [567] ]] && inherit eutils
 
 # Return all the flag variables that our high level funcs operate on.
 all-flag-vars() {