Don't assume we want the iOS ABI if running simarm on Mac and the EABI otherwise.

runtime/platform/globals.h

 // 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.
 
-#ifndef RUNTIME_PLATFORM_GLOBALS_H_
-#define RUNTIME_PLATFORM_GLOBALS_H_
+#ifndef PLATFORM_GLOBALS_H_
+#define PLATFORM_GLOBALS_H_
 
 // __STDC_FORMAT_MACROS has to be defined before including <inttypes.h> to
 // enable platform independent printf format specifiers.
 #ifndef __STDC_FORMAT_MACROS
 #define __STDC_FORMAT_MACROS
 #endif
 
 #if defined(_WIN32)
 // Cut down on the amount of stuff that gets included via windows.h.
 #if !defined(WIN32_LEAN_AND_MEAN)
@@ skipping 341 matching lines @@
 #else
 #error Unknown architecture.
 #endif
 
 // Disable background threads by default on armv5te. The relevant
 // implementations are uniprocessors.
 #if !defined(TARGET_ARCH_ARM_5TE)
 #define ARCH_IS_MULTI_CORE 1
 #endif
 
+
+#if defined(TARGET_ARCH_ARM)
+#if defined(TARGET_ABI_IOS) && defined(TARGET_ABI_EABI)
+#error Both TARGET_ABI_IOS and TARGET_ABI_EABI defined.
+#elif !defined(TARGET_ABI_IOS) && !defined(TARGET_ABI_EABI)
+#if defined(TARGET_OS_MAC)
+#define TARGET_ABI_IOS 1
+#else
+#define TARGET_ABI_EABI 1
+#endif
+#endif
+#endif  // TARGET_ARCH_ARM
+
+
 // Short form printf format specifiers
 #define Pd PRIdPTR
 #define Pu PRIuPTR
 #define Px PRIxPTR
 #define Pd64 PRId64
 #define Pu64 PRIu64
 #define Px64 PRIx64
 
 // Zero-padded pointer
 #if defined(ARCH_IS_32_BIT)
@@ skipping 298 matching lines @@
 // For checking deterministic graph generation, we can store instruction
 // tag in the ICData and check it when recreating the flow graph in
 // optimizing compiler. Enable it for other modes (product, release) if needed
 // for debugging.
 #if defined(DEBUG)
 #define TAG_IC_DATA
 #endif
 
 }  // namespace dart
 
-#endif  // RUNTIME_PLATFORM_GLOBALS_H_
+#endif  // PLATFORM_GLOBALS_H_