install-clang/patches/tools--clang--linker-args.patch

From d69bb4b646428fb4b177cd61e467f975d77277da Mon Sep 17 00:00:00 2001
From: Robin Sommer <robin@icir.org>
Date: Sun, 15 Jun 2014 19:57:19 -0700
Subject: Adapting linker arguments.

 - Adding -L<prefix>/lib to default linker arguments.
 - On Linux and FreeBSD, and -rpath.
 - Fix FreeBSD builtin library search paths.
---
 lib/Driver/ToolChains.cpp | 3 +++
 lib/Driver/Tools.cpp      | 9 +++++++++
 2 files changed, 12 insertions(+)

diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index 2309b2d..db59c01 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -2524,6 +2524,9 @@ void Bitrig::AddCXXStdlibLibArgs(const ArgList &Args,
 
 FreeBSD::FreeBSD(const Driver &D, const llvm::Triple& Triple, const ArgList &Args)
   : Generic_ELF(D, Triple, Args) {
+  // Look in the prefix before going into /usr/lib. Otherwise we'll wind up
+  // with the wrong libc++.
+  getFilePaths().push_back(getDriver().Dir + "/../lib");
 
   // When targeting 32-bit platforms, look for '/usr/lib32/crt1.o' and fall
   // back to '/usr/lib' if it doesn't exist.
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 9a5b361..32228fd 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -214,6 +214,15 @@ static void AddLinkerInputs(const ToolChain &TC,
   //                and only supported on native toolchains.
   if (!TC.isCrossCompiling())
     addDirectoryList(Args, CmdArgs, "-L", "LIBRARY_PATH");
+
+  if (!TC.isCrossCompiling()) {
+    CmdArgs.push_back(Args.MakeArgString("-L" + D.InstalledDir + "/../lib"));
+
+    auto os = TC.getTriple().getOS();
+    if (os == llvm::Triple::Linux || os == llvm::Triple::FreeBSD)
+      CmdArgs.push_back(Args.MakeArgString("-rpath=" + D.InstalledDir + "/../lib"));
+  }
+
 }
 
 /// \brief Determine whether Objective-C automated reference counting is
-- 
2.1.2