[llvm-objdump] Add -demangle (-C) option

Differential Revision: https://reviews.llvm.org/D49043

llvm-svn: 337401
diff --git a/llvm/tools/llvm-objdump/llvm-objdump.h b/llvm/tools/llvm-objdump/llvm-objdump.h
index 27734af..c5a1ac8 100644
--- a/llvm/tools/llvm-objdump/llvm-objdump.h
+++ b/llvm/tools/llvm-objdump/llvm-objdump.h
@@ -30,6 +30,7 @@
 extern cl::opt<std::string> TripleName;
 extern cl::opt<std::string> ArchName;
 extern cl::opt<std::string> MCPU;
+extern cl::opt<std::string> Demangle;
 extern cl::list<std::string> MAttrs;
 extern cl::list<std::string> FilterSections;
 extern cl::opt<bool> AllHeaders;
@@ -96,6 +97,7 @@
 void PrintSectionContents(const object::ObjectFile *o);
 void PrintSymbolTable(const object::ObjectFile *o, StringRef ArchiveName,
                       StringRef ArchitectureName = StringRef());
+void warn(StringRef Message);
 LLVM_ATTRIBUTE_NORETURN void error(Twine Message);
 LLVM_ATTRIBUTE_NORETURN void report_error(StringRef File, Twine Message);
 LLVM_ATTRIBUTE_NORETURN void report_error(StringRef File, std::error_code EC);