From 009a77818c53799db2d150e835332df6f5542004 Mon Sep 17 00:00:00 2001
From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Thu, 1 May 2014 23:24:24 +0000
Subject: [PATCH] Bitrig's standard C++ standard library changed from libstdc++
 to libc++. Also, it uses libc++abi and needs pthread.  While there, fix the
 libc++ include path. Patch by Patrick Wildt!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@207813 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Driver/ToolChains.cpp | 22 ++++++++++++++++++----
 lib/Driver/ToolChains.h   |  1 +
 test/Driver/bitrig.c      | 12 ++++++------
 3 files changed, 25 insertions(+), 10 deletions(-)

diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index 9465be8778..d8ed34ff6e 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -2407,6 +2407,21 @@ Tool *Bitrig::buildLinker() const {
   return new tools::bitrig::Link(*this);
 }
 
+ToolChain::CXXStdlibType
+Bitrig::GetCXXStdlibType(const ArgList &Args) const {
+  if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
+    StringRef Value = A->getValue();
+    if (Value == "libstdc++")
+      return ToolChain::CST_Libstdcxx;
+    if (Value == "libc++")
+      return ToolChain::CST_Libcxx;
+
+    getDriver().Diag(diag::err_drv_invalid_stdlib_name)
+      << A->getAsString(Args);
+  }
+  return ToolChain::CST_Libcxx;
+}
+
 void Bitrig::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
                                           ArgStringList &CC1Args) const {
   if (DriverArgs.hasArg(options::OPT_nostdlibinc) ||
@@ -2416,7 +2431,7 @@ void Bitrig::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
   switch (GetCXXStdlibType(DriverArgs)) {
   case ToolChain::CST_Libcxx:
     addSystemInclude(DriverArgs, CC1Args,
-                     getDriver().SysRoot + "/usr/include/c++/");
+                     getDriver().SysRoot + "/usr/include/c++/v1");
     break;
   case ToolChain::CST_Libstdcxx:
     addSystemInclude(DriverArgs, CC1Args,
@@ -2442,9 +2457,8 @@ void Bitrig::AddCXXStdlibLibArgs(const ArgList &Args,
   switch (GetCXXStdlibType(Args)) {
   case ToolChain::CST_Libcxx:
     CmdArgs.push_back("-lc++");
-    CmdArgs.push_back("-lcxxrt");
-    // Include supc++ to provide Unwind until provided by libcxx.
-    CmdArgs.push_back("-lgcc");
+    CmdArgs.push_back("-lc++abi");
+    CmdArgs.push_back("-lpthread");
     break;
   case ToolChain::CST_Libstdcxx:
     CmdArgs.push_back("-lstdc++");
diff --git a/lib/Driver/ToolChains.h b/lib/Driver/ToolChains.h
index ad4d4c1585..b1a0627840 100644
--- a/lib/Driver/ToolChains.h
+++ b/lib/Driver/ToolChains.h
@@ -557,6 +557,7 @@ public:
   bool IsMathErrnoDefault() const override { return false; }
   bool IsObjCNonFragileABIDefault() const override { return true; }
 
+  CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const override;
   void
   AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList &DriverArgs,
                               llvm::opt::ArgStringList &CC1Args) const override;
diff --git a/test/Driver/bitrig.c b/test/Driver/bitrig.c
index 876a9cdb9e..934cb02f22 100644
--- a/test/Driver/bitrig.c
+++ b/test/Driver/bitrig.c
@@ -4,14 +4,14 @@
 // CHECK-LD-C: ld{{.*}}" {{.*}} "-lc" "-lclang_rt.amd64"
 
 // RUN: %clangxx -no-canonical-prefixes -target amd64-pc-bitrig %s -### 2>&1 \
-// RUN:   | FileCheck --check-prefix=CHECK-LD-CXX %s
-// CHECK-LD-CXX: clang{{.*}}" "-cc1" "-triple" "amd64-pc-bitrig" 
-// CHECK-LD-CXX: ld{{.*}}" {{.*}} "-lstdc++" "-lm" "-lc" "-lclang_rt.amd64"
-
-// RUN: %clangxx -stdlib=libc++ -no-canonical-prefixes -target amd64-pc-bitrig %s -### 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-LD-CXX-STDLIB %s
 // CHECK-LD-CXX-STDLIB: clang{{.*}}" "-cc1" "-triple" "amd64-pc-bitrig"
-// CHECK-LD-CXX-STDLIB: ld{{.*}}" {{.*}} "-lc++" "-lcxxrt" "-lgcc" "-lm" "-lc" "-lclang_rt.amd64"
+// CHECK-LD-CXX-STDLIB: ld{{.*}}" {{.*}} "-lc++" "-lc++abi" "-lpthread" "-lm" "-lc" "-lclang_rt.amd64"
+
+// RUN: %clangxx -stdlib=libstdc++ -no-canonical-prefixes -target amd64-pc-bitrig %s -### 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-LD-CXX %s
+// CHECK-LD-CXX: clang{{.*}}" "-cc1" "-triple" "amd64-pc-bitrig"
+// CHECK-LD-CXX: ld{{.*}}" {{.*}} "-lstdc++" "-lm" "-lc" "-lclang_rt.amd64"
 
 // RUN: %clang -no-canonical-prefixes -target amd64-pc-bitrig -pthread %s -### 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-PTHREAD %s
-- 
2.40.0