Bring back a StringRef used in some build configurations

This was removed in the great unused local cleanup of r195814.

Adding cast-to-void to suppress unused variable warnings.

Should fix certain builds like ARCMT.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@195872 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/FrontendTool/ExecuteCompilerInvocation.cpp b/lib/FrontendTool/ExecuteCompilerInvocation.cpp
index f55c602178..e22f9ba052 100644
--- a/lib/FrontendTool/ExecuteCompilerInvocation.cpp
+++ b/lib/FrontendTool/ExecuteCompilerInvocation.cpp
@@ -32,6 +32,8 @@ using namespace llvm::opt;
 
 static FrontendAction *CreateFrontendBaseAction(CompilerInstance &CI) {
   using namespace clang::frontend;
+  StringRef Action("unknown");
+  (void)Action;
 
   switch (CI.getFrontendOpts().ProgramAction) {
   case ASTDeclList:            return new ASTDeclListAction();