diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index e3612c7..8158b72 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -480,7 +480,6 @@
                       
   // Forward -f options which we can pass directly.
   Args.AddLastArg(CmdArgs, options::OPT_femit_all_decls);
-  Args.AddLastArg(CmdArgs, options::OPT_fexceptions);
   Args.AddLastArg(CmdArgs, options::OPT_ffreestanding);
   Args.AddLastArg(CmdArgs, options::OPT_fheinous_gnu_extensions);
   Args.AddLastArg(CmdArgs, options::OPT_fgnu_runtime);
@@ -530,6 +529,20 @@
       CmdArgs.push_back("-fblocks=0");
   }
 
+  // -fexceptions default varies depending on platform and language; only
+  // pass if specified.
+ if (Arg *A = Args.getLastArg(options::OPT_fexceptions,
+                               options::OPT_fno_exceptions)) {
+    if (A->getOption().matches(options::OPT_fexceptions))
+      CmdArgs.push_back("-fexceptions");
+    else
+      CmdArgs.push_back("-fexceptions=0");
+  }
+
+  // -frtti is default, only pass non-default.
+  if (!Args.hasFlag(options::OPT_frtti, options::OPT_fno_rtti))
+    CmdArgs.push_back("-frtti=0");
+
   // -fsigned-char/-funsigned-char default varies depending on platform; only
   // pass if specified.
   if (Arg *A = Args.getLastArg(options::OPT_fsigned_char,
@@ -1669,6 +1682,7 @@
         // Derived from darwin_iphoneos_libgcc spec.
         CmdArgs.push_back("-lgcc_s.10.5");
       } else if (Args.hasArg(options::OPT_shared_libgcc) ||
+                 // FIXME: -fexceptions -fno-exceptions means no exceptions
                  Args.hasArg(options::OPT_fexceptions) ||
                  Args.hasArg(options::OPT_fgnu_runtime)) {
         // FIXME: This is probably broken on 10.3?