Fixed compile errors on linux.

src/compiler/preprocessor/new/DirectiveParser.cpp

@@ -7,6 +7,7 @@
 #include "DirectiveParser.h"
 
 #include <cassert>
+#include <cstdlib>
 #include <sstream>
 
 #include "Diagnostics.h"
@@ -218,7 +219,7 @@ void DirectiveParser::parseUndef(Token* token)
         return;
     }
 
-    MacroSet::const_iterator iter = mMacroSet->find(token->value);
+    MacroSet::iterator iter = mMacroSet->find(token->value);
     if (iter != mMacroSet->end())
         mMacroSet->erase(iter);
 

src/compiler/preprocessor/new/Macro.h

@@ -35,4 +35,4 @@ struct Macro
 typedef std::map<std::string, Macro> MacroSet;
 
 }  // namespace pp
-#endif COMPILER_PREPROCESSOR_MACRO_H_
+#endif  // COMPILER_PREPROCESSOR_MACRO_H_