From 68058c66aca7d7d00648904140d5742b89f1ad72 Mon Sep 17 00:00:00 2001
From: Frederik Rietdijk <fridh@fridh.nl>
Date: Sun, 29 Mar 2020 10:55:17 +0200
Subject: [PATCH] pkgsStatic.libunwind: fix build, fixes #81198

---
 pkgs/development/libraries/libunwind/default.nix | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/libunwind/default.nix b/pkgs/development/libraries/libunwind/default.nix
index 70e6b698ec5..f49bebe9b1a 100644
--- a/pkgs/development/libraries/libunwind/default.nix
+++ b/pkgs/development/libraries/libunwind/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, autoreconfHook, xz }:
+{ stdenv, lib, fetchurl, autoreconfHook, xz }:
 
 stdenv.mkDerivation rec {
   pname = "libunwind";
@@ -11,6 +11,10 @@ stdenv.mkDerivation rec {
 
   patches = [ ./backtrace-only-with-glibc.patch ];
 
+  postPatch = lib.optionalString stdenv.hostPlatform.isMusl ''
+    substituteInPlace configure.ac --replace "-lgcc_s" "-lgcc_eh"
+  '';
+
   nativeBuildInputs = [ autoreconfHook ];
 
   outputs = [ "out" "dev" ];