Somehow the -fgnu-runtime option itself got lost in all that shuffling.

Restore it.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134459 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Driver/Tools.cpp

@@ -1772,10 +1772,12 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
     bool NeXTRuntimeIsDefault
       = (IsRewriter || getToolChain().getTriple().isOSDarwin());
     if (Args.hasFlag(options::OPT_fnext_runtime, options::OPT_fgnu_runtime,
-                     NeXTRuntimeIsDefault))
+                     NeXTRuntimeIsDefault)) {
       objCRuntime.setKind(ObjCRuntime::NeXT);
-    else
+    } else {
+      CmdArgs.push_back("-fgnu-runtime");
       objCRuntime.setKind(ObjCRuntime::GNU);
+    }
     getToolChain().configureObjCRuntime(objCRuntime);
     if (objCRuntime.HasARC)
       CmdArgs.push_back("-fobjc-runtime-has-arc");

test/Driver/gnu-runtime.m

@@ -0,0 +1,5 @@
+// RUN: %clang -ccc-host-triple i386-apple-darwin10 -### -fsyntax-only -fgnu-runtime %s 2>&1 | FileCheck %s
+// RUN: %clang -ccc-host-triple i386-apple-darwin10 -### -x objective-c++ -fsyntax-only -fgnu-runtime %s 2>&1 | FileCheck %s
+// CHECK: -fgnu-runtime
+// CHECK: -fobjc-runtime-has-arc
+// CHECK: -fobjc-runtime-has-weak