From a030bc58683d0f24cc905659eba34bbdf758a086 Mon Sep 17 00:00:00 2001
From: Filip Navara <navara@emclient.com>
Date: Thu, 21 Sep 2023 14:09:31 +0200
Subject: [PATCH] [ObjWriter] Emit the MH_SUBSECTIONS_VIA_SYMBOLS header flag
 for Mach-O

---
 llvm/tools/objwriter/objwriter.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/llvm/tools/objwriter/objwriter.cpp b/llvm/tools/objwriter/objwriter.cpp
index cde58f14aa90b..903d4ee813bb0 100644
--- a/llvm/tools/objwriter/objwriter.cpp
+++ b/llvm/tools/objwriter/objwriter.cpp
@@ -155,6 +155,10 @@ bool ObjectWriter::Init(llvm::StringRef ObjectFilePath, const char* tripleName)
 
   CFIsPerOffset.truncate(0);
 
+  if (OutContext->getObjectFileType() == MCContext::IsMachO) {
+    Streamer->emitAssemblerFlag(MCAF_SubsectionsViaSymbols);
+  }
+
   return true;
 }