From 766538f83cbbe33ca291feb7ec43cf2937c098da Mon Sep 17 00:00:00 2001
From: Jeremy Huddleston Sequoia <jeremyhu@apple.com>
Date: Thu, 14 Jan 2021 10:08:34 -0800
Subject: [PATCH] darwin: Use the system libunwind

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/4094

Signed-off-by: Jeremy Huddleston Sequoia <jeremyhu@apple.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8507>
---
 meson.build | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/meson.build b/meson.build
index 635dfc9169e..96571c9df25 100644
--- a/meson.build
+++ b/meson.build
@@ -1735,7 +1735,11 @@ elif _libunwind == 'false'
   warning('libunwind option "false" deprecated, please use "disabled" instead.')
 endif
 if _libunwind != 'disabled' and not with_platform_android
-  dep_unwind = dependency('libunwind', required : _libunwind == 'enabled')
+  if host_machine.system() == 'darwin'
+    dep_unwind = meson.get_compiler('c').find_library('System')
+  else
+    dep_unwind = dependency('libunwind', required : _libunwind == 'enabled')
+  endif
   if dep_unwind.found()
     pre_args += '-DHAVE_LIBUNWIND'
   endif