From 2488a5d11c8a5ff0c5ab3749dd36ef8ba53bfac1 Mon Sep 17 00:00:00 2001
From: Martell Malone <martellmalone@gmail.com>
Date: Fri, 5 Aug 2016 21:50:38 -0700
Subject: [PATCH 4/4] mingw-w64: support static builds of libc++

Static builds require libc++abi to be linked
Will add support for both modes in future
---
 lib/Driver/MinGWToolChain.cpp | 15 +++++++++++++++
 lib/Driver/ToolChains.h       |  4 ++++
 2 files changed, 19 insertions(+)

diff --git a/lib/Driver/MinGWToolChain.cpp b/lib/Driver/MinGWToolChain.cpp
index 1ac3bd3..3c3e319 100644
--- a/lib/Driver/MinGWToolChain.cpp
+++ b/lib/Driver/MinGWToolChain.cpp
@@ -249,3 +249,18 @@ void MinGW::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
     break;
   }
 }
+
+void MinGW::AddCXXStdlibLibArgs(const ArgList &Args,
+                         ArgStringList &CmdArgs) const {
+  switch (GetCXXStdlibType(Args)) {
+  case ToolChain::CST_Libcxx:
+    CmdArgs.push_back("-lc++");
+    // Support only static libc++ for now
+    CmdArgs.push_back("-lc++abi");
+    break;
+
+  case ToolChain::CST_Libstdcxx:
+    CmdArgs.push_back("-lstdc++");
+    break;
+  }
+}
diff --git a/lib/Driver/ToolChains.h b/lib/Driver/ToolChains.h
index 3be7f25..f62207d 100644
--- a/lib/Driver/ToolChains.h
+++ b/lib/Driver/ToolChains.h
@@ -705,6 +705,10 @@ public:
   void
   AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
                             llvm::opt::ArgStringList &CC1Args) const override;
+
+  void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
+                           llvm::opt::ArgStringList &CmdArgs) const override;
+
   void AddClangCXXStdlibIncludeArgs(
       const llvm::opt::ArgList &DriverArgs,
       llvm::opt::ArgStringList &CC1Args) const override;
-- 
2.7.4