Subzero: Add basic ELFObjectWriter (text section, symtab, strtab, headers)

src/IceDefs.h

Index: src/IceDefs.h
diff --git a/src/IceDefs.h b/src/IceDefs.h
index a28da4b7c2a8f9cf5a233af05527fa7d95c34e7c..6c44ec535e9d7ed24fd505e7e9cdbbbe38fa2999 100644
--- a/src/IceDefs.h
+++ b/src/IceDefs.h
@@ -33,6 +33,7 @@
 #include "llvm/ADT/SmallBitVector.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Support/Casting.h"
+#include "llvm/Support/ELF.h"
 #include "llvm/Support/raw_ostream.h"
 
 namespace Ice {
@@ -65,6 +66,7 @@ typedef std::vector<Variable *> VarList;
 typedef std::vector<Operand *> OperandList;
 typedef std::vector<CfgNode *> NodeList;
 typedef std::vector<Constant *> ConstantList;
+typedef std::vector<GlobalDeclaration *> GlobalDeclarationList;
 
 // SizeT is for holding small-ish limits like number of source
 // operands in an instruction.  It is used instead of size_t (which
@@ -126,6 +128,7 @@ enum VerboseItem {
 typedef uint32_t VerboseMask;
 
 typedef llvm::raw_ostream Ostream;
+typedef llvm::raw_fd_ostream Fdstream;
 
 } // end of namespace Ice