[clang] [Clang][Driver] Add gcc-13 toolset path on RHEL (PR #174464)

[Jan Patrick Lehr via cfe-commits]

https://github.com/jplehr created https://github.com/llvm/llvm-project/pull/174464

Adding this additional path to enable clang+offload to be easily buildable in RHEL-based distros with GCC 13 toolset.

>From 47f55b8d48ded15e230c283a6e418503e317e66e Mon Sep 17 00:00:00 2001
From: JP Lehr <JanPatrick.Lehr at amd.com>
Date: Mon, 5 Jan 2026 13:07:49 -0600
Subject: [PATCH] [Clang][Driver] Add gcc-13 toolset path on RHEL

Adding this additional path to enable clang+offload to be easily
buildable in RHEL-based distros with GCC 13 toolset.
---
 clang/lib/Driver/ToolChains/Gnu.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
index 1bfcd1f4f3a7c..7ecdbe7c57650 100644
--- a/clang/lib/Driver/ToolChains/Gnu.cpp
+++ b/clang/lib/Driver/ToolChains/Gnu.cpp
@@ -2293,6 +2293,7 @@ void Generic_GCC::GCCInstallationDetector::AddDefaultGCCPrefixes(
       D.getVFS().exists("/opt/rh")) {
     // TODO: We may want to remove this, since the functionality
     //   can be achieved using config files.
+    Prefixes.push_back("/opt/rh/gcc-toolset-13/root/usr");
     Prefixes.push_back("/opt/rh/gcc-toolset-12/root/usr");
     Prefixes.push_back("/opt/rh/gcc-toolset-11/root/usr");
     Prefixes.push_back("/opt/rh/gcc-toolset-10/root/usr");