commit bd77c59acc58e797756b0fcc6739319587e95d85
Author: Bob Wilson <bob.wilson@apple.com>
Date:   Fri Aug 2 22:25:34 2013 +0000

    Only use the Darwin linker's -export_dynamic option with supported versions.
    
    Related to <rdar://problem/14578094>.
    
    git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@187680 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 33e2803..dfaffaa 100644
--- a/tools/clang/lib/Driver/Tools.cpp
+++ b/tools/clang/lib/Driver/Tools.cpp
@@ -4517,6 +4517,9 @@ void darwin::Link::AddLinkArgs(Compilation &C,
       CmdArgs.push_back("-demangle");
   }
 
+  if (Args.hasArg(options::OPT_rdynamic) && Version[0] >= 137)
+    CmdArgs.push_back("-export_dynamic");
+
   // If we are using LTO, then automatically create a temporary file path for
   // the linker to use, so that it's lifetime will extend past a possible
   // dsymutil step.
@@ -4724,9 +4727,6 @@ void darwin::Link::ConstructJob(Compilation &C, const JobAction &JA,
   if (Args.hasArg(options::OPT_ObjC) || Args.hasArg(options::OPT_ObjCXX))
     CmdArgs.push_back("-ObjC");
 
-  if (Args.hasArg(options::OPT_rdynamic))
-    CmdArgs.push_back("-export_dynamic");
-
   CmdArgs.push_back("-o");
   CmdArgs.push_back(Output.getFilename());
 
diff --git a/test/Driver/darwin-ld.c b/test/Driver/darwin-ld.c
index cd511e0..d6c5170 100644
--- a/tools/clang/test/Driver/darwin-ld.c
+++ b/tools/clang/test/Driver/darwin-ld.c
@@ -130,3 +130,17 @@
 // RUN: FileCheck -check-prefix=LINK_PG %s < %t.log
 // LINK_PG: -lgcrt1.o
 // LINK_PG: -no_new_main
+
+// RUN: %clang -target x86_64-apple-darwin12 -rdynamic -### %t.o \
+// RUN:   -mlinker-version=100 2> %t.log
+// RUN: FileCheck -check-prefix=LINK_NO_EXPORT_DYNAMIC %s < %t.log
+// LINK_NO_EXPORT_DYNAMIC: {{ld(.exe)?"}}
+// LINK_NO_EXPORT_DYNAMIC-NOT: "-export_dynamic"
+
+// RUN: %clang -target x86_64-apple-darwin12 -rdynamic -### %t.o \
+// RUN:   -mlinker-version=137 2> %t.log
+// RUN: FileCheck -check-prefix=LINK_EXPORT_DYNAMIC %s < %t.log
+// LINK_EXPORT_DYNAMIC: {{ld(.exe)?"}}
+// LINK_EXPORT_DYNAMIC: "-export_dynamic"
+
+