3 files changed, 6 insertions, 4 deletions
diff --git a/include/llvm/System/DynamicLibrary.h b/include/llvm/System/DynamicLibrary.h
index ac58407a194d..745b8f8b5b4b 100644
--- a/include/llvm/System/DynamicLibrary.h
+++ b/include/llvm/System/DynamicLibrary.h
@@ -23,7 +23,7 @@ namespace sys {
   /// might be known as shared libraries, shared objects, dynamic shared
   /// objects, or dynamic link libraries. Regardless of the terminology or the
   /// operating system interface, this class provides a portable interface that
-  /// allows dynamic libraries to be loaded and and searched for externally
+  /// allows dynamic libraries to be loaded and searched for externally
   /// defined symbols. This is typically used to provide "plug-in" support.
   /// It also allows for symbols to be defined which don't live in any library,
   /// but rather the main program itself, useful on Windows where the main
diff --git a/include/llvm/System/Path.h b/include/llvm/System/Path.h
index bdfb9aa9b791..1be27b27be05 100644
--- a/include/llvm/System/Path.h
+++ b/include/llvm/System/Path.h
@@ -28,7 +28,7 @@ namespace sys {
   /// platform independent and eliminates many of the unix-specific fields.
   /// However, to support llvm-ar, the mode, user, and group fields are
   /// retained. These pertain to unix security and may not have a meaningful
-  /// value on non-Unix platforms. However, the other fields fields should
+  /// value on non-Unix platforms. However, the other fields should
   /// always be applicable on all platforms.  The structure is filled in by
   /// the PathWithStatus class.
   /// @brief File status structure
diff --git a/include/llvm/System/Program.h b/include/llvm/System/Program.h
index 679956272609..69ce47892e14 100644
--- a/include/llvm/System/Program.h
+++ b/include/llvm/System/Program.h
@@ -120,10 +120,12 @@ namespace sys {
     /// @brief Construct a Program by finding it by name.
     static Path FindProgramByName(const std::string& name);
 
-    // These methods change the specified standard stream (stdin or stdout) to
-    // binary mode. They return true if an error occurred
+    // These methods change the specified standard stream (stdin,
+    // stdout, or stderr) to binary mode. They return true if an error
+    // occurred
     static bool ChangeStdinToBinary();
     static bool ChangeStdoutToBinary();
+    static bool ChangeStderrToBinary();
 
     /// A convenience function equivalent to Program prg; prg.Execute(..);
     /// prg.Wait(..);