From c1afcd7c7969b15b31706faf7edb5cf94b6d4758 Mon Sep 17 00:00:00 2001
From: Reid Kleckner <rnk@google.com>
Date: Wed, 4 Jan 2017 18:16:32 +0000
Subject: Accept and ignore -Wa,-mbig-obj on COFF targets for gas compatibility

LLVM's integrated assembler will automatically switch to big objects
when there are more than 2**16 sections.

Patch by Kyra!

llvm-svn: 290979
---
 clang/lib/Driver/Tools.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'clang/lib/Driver/Tools.cpp')

diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 874799b1101..ea5ad7d051b 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -3067,6 +3067,10 @@ static void CollectArgsForIntegratedAssembler(Compilation &C,
         continue;
       }
 
+      if (C.getDefaultToolChain().getTriple().isOSBinFormatCOFF() &&
+          Value == "-mbig-obj")
+        continue; // LLVM handles bigobj automatically
+
       switch (C.getDefaultToolChain().getArch()) {
       default:
         break;
-- 
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