From 4affcfff1bca6234cca90d36a185e1492a1f3f85 Mon Sep 17 00:00:00 2001
From: Flatcar Buildbot <buildbot@flatcar-linux.org>
Date: Mon, 16 Sep 2024 07:13:50 +0000
Subject: [PATCH] eclass/multibuild: Sync with Gentoo

It's from Gentoo commit 737ca561f4234b12fd88efcccd34120be571ab95.
---
 .../portage-stable/eclass/multibuild.eclass        | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/sdk_container/src/third_party/portage-stable/eclass/multibuild.eclass b/sdk_container/src/third_party/portage-stable/eclass/multibuild.eclass
index f15d3327c7..0677ea346e 100644
--- a/sdk_container/src/third_party/portage-stable/eclass/multibuild.eclass
+++ b/sdk_container/src/third_party/portage-stable/eclass/multibuild.eclass
@@ -1,4 +1,4 @@
-# Copyright 1999-2023 Gentoo Authors
+# Copyright 1999-2024 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: multibuild.eclass
@@ -13,17 +13,21 @@
 # multiple 'variants' of a package (e.g. multilib, Python
 # implementations).
 
+if [[ ! ${_MULTIBUILD_ECLASS} ]]; then
+_MULTIBUILD_ECLASS=1
+
 case ${EAPI} in
-	6|7|8)
+	6)
+		ewarn "${CATEGORY}/${PF}: ebuild uses ${ECLASS} with deprecated EAPI ${EAPI}!"
+		ewarn "${CATEGORY}/${PF}: Support will be removed on 2024-10-08. Please port to newer EAPI."
+		;;
+	7|8)
 		# backwards compatibility for run_in_build_dir
 		inherit out-of-source-utils
 		;;
 	*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
 esac
 
-if [[ ! ${_MULTIBUILD_ECLASS} ]]; then
-_MULTIBUILD_ECLASS=1
-
 # @ECLASS_VARIABLE: MULTIBUILD_VARIANTS
 # @REQUIRED
 # @DESCRIPTION: