ARM64: Fix native builds

src/cpu.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cpu.h"
 
 #if V8_LIBC_MSVCRT
 #include <intrin.h>  // __cpuid()
 #endif
 #if V8_OS_POSIX
@@ skipping 188 matching lines @@
       result[len] = '\0';
     }
     return result;
   }
 
  private:
   char* data_;
   size_t datalen_;
 };
 
+#if V8_HOST_ARCH_ARM || V8_HOST_ARCH_MIPS
 
 // Checks that a space-separated list of items contains one given 'item'.
 static bool HasListItem(const char* list, const char* item) {
   ssize_t item_len = strlen(item);
   const char* p = list;
   if (p != NULL) {
     while (*p != '\0') {
       // Skip whitespace.
       while (isspace(*p)) ++p;
 
       // Find end of current list item.
       const char* q = p;
       while (*q != '\0' && !isspace(*q)) ++q;
 
       if (item_len == q - p && memcmp(p, item, item_len) == 0) {
         return true;
       }
 
       // Skip to next item.
       p = q;
     }
   }
   return false;
 }
 
+#endif  // V8_HOST_ARCH_ARM || V8_HOST_ARCH_MIPS
+
 #endif  // V8_OS_LINUX
 
 #endif  // V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64
 
 CPU::CPU() : stepping_(0),
              model_(0),
              ext_model_(0),
              family_(0),
              ext_family_(0),
              type_(0),
@@ skipping 255 matching lines @@
 #if V8_OS_WIN
   SYSTEM_INFO info;
   GetSystemInfo(&info);
   return info.dwNumberOfProcessors;
 #else
   return static_cast<int>(sysconf(_SC_NPROCESSORS_ONLN));
 #endif
 }
 
 } }  // namespace v8::internal