From cc2abedb5bf529b9806ff24d533bb01338478fcb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Mon, 6 Dec 2021 19:40:56 +0100
Subject: [PATCH] pkgsLLVM.libunwind: fix build

---
 pkgs/development/libraries/libunwind/default.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/libunwind/default.nix b/pkgs/development/libraries/libunwind/default.nix
index 1f47338c2a69..0a931821837e 100644
--- a/pkgs/development/libraries/libunwind/default.nix
+++ b/pkgs/development/libraries/libunwind/default.nix
@@ -19,7 +19,9 @@ stdenv.mkDerivation rec {
     })
   ];
 
-  postPatch = lib.optionalString stdenv.hostPlatform.isMusl ''
+  postPatch = if stdenv.cc.isClang then ''
+    substituteInPlace configure.ac --replace "-lgcc_s" ""
+  '' else lib.optionalString stdenv.hostPlatform.isMusl ''
     substituteInPlace configure.ac --replace "-lgcc_s" "-lgcc_eh"
   '';