Added "-o" option to driver.  ASTConsumers will need to be gradually
rewired to utilize this option.

Renamed option --serialize-ast --serialize.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@45213 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Driver/clang.cpp b/Driver/clang.cpp
index dc435f9..9727e11 100644
--- a/Driver/clang.cpp
+++ b/Driver/clang.cpp
@@ -110,12 +110,17 @@
                         "Run prototype serializtion code."),
              clEnumValN(EmitLLVM, "emit-llvm",
                         "Build ASTs then convert to LLVM, emit .ll file"),
-             clEnumValN(SerializeAST, "serialize-ast",
+             clEnumValN(SerializeAST, "serialize",
                         "Build ASTs and emit .ast file"),
              clEnumValN(RewriteTest, "rewrite-test",
                         "Playground for the code rewriter"),
              clEnumValEnd));
 
+
+static llvm::cl::opt<std::string>
+OutputFile("o",
+ llvm::cl::desc("Specify output file (for --serialize, this is a directory)"));
+                          
 static llvm::cl::opt<bool>
 VerifyDiagnostics("verify",
                   llvm::cl::desc("Verify emitted diagnostics and warnings."));