Rebased PNaCl localmods in LLVM to 223109

lib/Support/Unix/Host.inc

 //===- llvm/Support/Unix/Host.inc -------------------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements the UNIX Host support.
 //
 //===----------------------------------------------------------------------===//
 
 //===----------------------------------------------------------------------===//
 //=== WARNING: Implementation here must contain only generic UNIX code that
 //===          is guaranteed to work on *all* UNIX variants.
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Config/config.h"
 #include "llvm/ADT/StringRef.h"
 #include "Unix.h"
+#if !defined(__native_client__)
 #include <sys/utsname.h>
+#endif // (__native_client__)
 #include <cctype>
 #include <string>
 
 using namespace llvm;
 
 static std::string getOSVersion() {
+#if !defined(__native_client__)
   struct utsname info;
 
   if (uname(&info))
     return "";
 
   return info.release;
+#else // (__native_client__)
+  return "";
+#endif // (__native_client__)
 }
 
 std::string sys::getDefaultTargetTriple() {
   StringRef TargetTripleString(LLVM_DEFAULT_TARGET_TRIPLE);
   std::pair<StringRef, StringRef> ArchSplit = TargetTripleString.split('-');
 
   // Normalize the arch, since the target triple may not actually match the
   // target.
   std::string Arch = ArchSplit.first;
 
   std::string Triple(Arch);
   Triple += '-';
   Triple += ArchSplit.second;
 
   // Force i<N>86 to i386.
   if (Triple[0] == 'i' && isdigit(Triple[1]) &&
       Triple[2] == '8' && Triple[3] == '6')
     Triple[1] = '3';
 
   // On darwin, we want to update the version to match that of the
   // target.
   std::string::size_type DarwinDashIdx = Triple.find("-darwin");
   if (DarwinDashIdx != std::string::npos) {
     Triple.resize(DarwinDashIdx + strlen("-darwin"));
     Triple += getOSVersion();
   }
 
   return Triple::normalize(Triple);
 }