For arm, chooses hard vs. soft fp ABI based on compiler.

runtime/vm/cpu_arm.h

 // Copyright (c) 2014, 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.
 
 #ifndef VM_CPU_ARM_H_
 #define VM_CPU_ARM_H_
 
 #include "vm/allocation.h"
 #include "vm/simulator.h"
 
@@ skipping 27 matching lines @@
     return integer_division_supported_;
   }
   static bool vfp_supported() {
     DEBUG_ASSERT(initialized_);
     return vfp_supported_;
   }
   static bool neon_supported() {
     DEBUG_ASSERT(initialized_);
     return neon_supported_;
   }
+  static bool hardfp_supported() {
+    DEBUG_ASSERT(initialized_);
+    return hardfp_supported_;
+  }
   static ARMVersion arm_version() {
     DEBUG_ASSERT(initialized_);
     return arm_version_;
   }
 
 #if !defined(HOST_ARCH_ARM)
   static void set_integer_division_supported(bool supported) {
     DEBUG_ASSERT(initialized_);
     integer_division_supported_ = supported;
   }
   static void set_vfp_supported(bool supported) {
     DEBUG_ASSERT(initialized_);
     vfp_supported_ = supported;
   }
   static void set_neon_supported(bool supported) {
     DEBUG_ASSERT(initialized_);
     neon_supported_ = supported;
   }
   static void set_arm_version(ARMVersion version) {
     DEBUG_ASSERT(initialized_);
     arm_version_ = version;
   }
 #endif  // !defined(HOST_ARCH_ARM)
 
  private:
   static const char* hardware_;
   static bool integer_division_supported_;
   static bool vfp_supported_;
   static bool neon_supported_;
+  static bool hardfp_supported_;
   static ARMVersion arm_version_;
 #if defined(DEBUG)
   static bool initialized_;
 #endif
 };
 
 class TargetCPUFeatures : public AllStatic {
  public:
   static void InitOnce() {
     HostCPUFeatures::InitOnce();
   }
   static void Cleanup() {
     HostCPUFeatures::Cleanup();
   }
   static bool double_truncate_round_supported() {
     return false;
   }
   static bool integer_division_supported() {
     return HostCPUFeatures::integer_division_supported();
   }
   static bool vfp_supported() {
     return HostCPUFeatures::vfp_supported();
   }
   static bool neon_supported() {
     return HostCPUFeatures::neon_supported();
   }
+  static bool hardfp_supported() {
+    return HostCPUFeatures::hardfp_supported();
+  }
   static const char* hardware() {
     return HostCPUFeatures::hardware();
   }
   static ARMVersion arm_version() {
     return HostCPUFeatures::arm_version();
   }
 };
 
 }  // namespace dart
 
 #endif  // VM_CPU_ARM_H_