Prepares for arm64 cross-build.

runtime/vm/cpuinfo_linux.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_OS_LINUX)
 
 #include "vm/cpuinfo.h"
 #include "vm/cpuid.h"
 #include "vm/proccpuinfo.h"
@@ skipping 24 matching lines @@
   fields_[kCpuInfoFeatures] = "Features";
   method_ = kCpuInfoSystem;
   ProcCpuInfo::InitOnce();
 #elif defined(HOST_ARCH_MIPS)
   fields_[kCpuInfoProcessor] = "system type";
   fields_[kCpuInfoModel] = "cpu model";
   fields_[kCpuInfoHardware] = "cpu model";
   fields_[kCpuInfoFeatures] = "ASEs implemented";
   method_ = kCpuInfoSystem;
   ProcCpuInfo::InitOnce();
+#elif defined(HOST_ARCH_ARM64)

[regis, 2014/05/27 17:59:57]

You could factor this section with HOST_ARCH_ARM (your TODO may split them again
later):

#elif defined(HOST_ARCH_ARM) || defined(HOST_ARCH_ARM64)

[zra, 2014/05/27 18:05:00]

Done.

+  // TODO(zra): Verify that these field names are correct.
+  fields_[kCpuInfoProcessor] = "Processor";
+  fields_[kCpuInfoModel] = "model name";
+  fields_[kCpuInfoHardware] = "Hardware";
+  fields_[kCpuInfoFeatures] = "Features";
+  method_ = kCpuInfoSystem;
+  ProcCpuInfo::InitOnce();
 #else
 #error Unrecognized target architecture
 #endif
 }
 
 
 void CpuInfo::Cleanup() {
   if (method_ == kCpuInfoCpuId) {
     CpuId::Cleanup();
   } else {
@@ skipping 64 matching lines @@
            (strcmp(field, fields_[kCpuInfoFeatures]) == 0);
   } else {
     ASSERT(method_ == kCpuInfoSystem);
     return ProcCpuInfo::HasField(field);
   }
 }
 
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_LINUX)