From 51940420aeab96f332a780edd83d1fe1855f88b2 Mon Sep 17 00:00:00 2001
From: Flatcar Buildbot <buildbot@flatcar-linux.org>
Date: Mon, 19 Jun 2023 07:14:17 +0000
Subject: [PATCH] eclass/llvm: Sync with Gentoo

It's from Gentoo commit 8e9c05ddfcd74be3b53c7c4c2fbc799a9ab7fa61.
---
 .../src/third_party/portage-stable/eclass/llvm.eclass       | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sdk_container/src/third_party/portage-stable/eclass/llvm.eclass b/sdk_container/src/third_party/portage-stable/eclass/llvm.eclass
index 022820d012..223e2a15ba 100644
--- a/sdk_container/src/third_party/portage-stable/eclass/llvm.eclass
+++ b/sdk_container/src/third_party/portage-stable/eclass/llvm.eclass
@@ -250,6 +250,12 @@ llvm_pkg_setup() {
 		llvm_fix_tool_path ADDR2LINE AR AS LD NM OBJCOPY OBJDUMP RANLIB
 		llvm_fix_tool_path READELF STRINGS STRIP
 
+		# Set LLVM_CONFIG to help Meson (bug #907965) but only do it
+		# for empty ESYSROOT (as a proxy for "are we cross-compiling?").
+		if [[ -z ${ESYSROOT} ]] ; then
+			llvm_fix_tool_path LLVM_CONFIG
+		fi
+
 		local prefix=${ESYSROOT}
 		local llvm_path=${prefix}/usr/lib/llvm/${LLVM_SLOT}/bin
 		local IFS=: