From 4f31a3e8dfe6b69e4355168ca638f45e4caf3f63 Mon Sep 17 00:00:00 2001
From: Carlo Cabrera <30379873+carlocab@users.noreply.github.com>
Date: Thu, 18 Apr 2024 23:15:47 +0800
Subject: [PATCH] extend/ENV/super: avoid adding `llvm` to
 `HOMEBREW_LIBRARY_PATHS`

This leads to undesired linkage with LLVM's `libunwind` (because it
shadows the system's `libunwind`).

See, for example, Homebrew/homebrew-core#169354.
---
 Library/Homebrew/extend/ENV/super.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Library/Homebrew/extend/ENV/super.rb b/Library/Homebrew/extend/ENV/super.rb
index 6beeb4cb2f..d9d4f45555 100644
--- a/Library/Homebrew/extend/ENV/super.rb
+++ b/Library/Homebrew/extend/ENV/super.rb
@@ -229,7 +229,9 @@ module Superenv
       end
     end
 
-    paths << keg_only_deps.map(&:opt_lib)
+    # Don't add `llvm` to library paths; this leads to undesired linkage to LLVM's `libunwind`
+    paths << keg_only_deps.reject { |dep| dep.name.match?(/^llvm(@\d+)?$/) }
+                          .map(&:opt_lib)
     paths << (HOMEBREW_PREFIX/"lib")
 
     paths += homebrew_extra_library_paths