From 1279b79c9bb10c15baab08a629ebc535b442af3b Mon Sep 17 00:00:00 2001
From: Nico Weber <thakis@chromium.org>
Date: Mon, 31 May 2021 13:17:10 -0400
Subject: [PATCH] [gn build] make libunwind build on macOS

---
 llvm/utils/gn/secondary/BUILD.gn               | 4 +++-
 llvm/utils/gn/secondary/libunwind/src/BUILD.gn | 4 ++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/llvm/utils/gn/secondary/BUILD.gn b/llvm/utils/gn/secondary/BUILD.gn
index 50f1c4f26d6b..16b4c986d747 100644
--- a/llvm/utils/gn/secondary/BUILD.gn
+++ b/llvm/utils/gn/secondary/BUILD.gn
@@ -18,12 +18,14 @@ group("default") {
     deps += [
       "//libcxx",
       "//libcxxabi",
-      "//libunwind",
     ]
   }
   if (current_os == "linux" || current_os == "android") {
     deps += [ "//compiler-rt/test/hwasan" ]
   }
+  if (current_os == "linux" || current_os == "mac") {
+    deps += [ "//libunwind" ]
+  }
 
   testonly = true
 }
diff --git a/llvm/utils/gn/secondary/libunwind/src/BUILD.gn b/llvm/utils/gn/secondary/libunwind/src/BUILD.gn
index c36341ca54b2..28869295c9de 100644
--- a/llvm/utils/gn/secondary/libunwind/src/BUILD.gn
+++ b/llvm/utils/gn/secondary/libunwind/src/BUILD.gn
@@ -84,8 +84,8 @@ if (libunwind_enable_shared) {
     }
     if (current_os == "mac") {
       ldflags += [
-        "-compatibility_version 1",
-        "-install_name /usr/lib/libunwind.1.dylib",
+        "-Wl,-compatibility_version,1",
+        "-Wl,-install_name,/usr/lib/libunwind.1.dylib",
       ]
     }
     sources = unwind_sources