Use -no_compact_unwind when creating dylibs on Mac.

tools/testing/dart/compiler_configuration.dart

 // 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.
 
 library compiler_configuration;
 
 import 'dart:io' show Platform;
 
 import 'runtime_configuration.dart' show RuntimeConfiguration;
 import 'runtime_configuration.dart' show DartPrecompiledAdbRuntimeConfiguration;
@@ skipping 634 matching lines @@
         bootstrapDependencies(buildDir), exec, args, environmentOverrides);
   }
 
   CompilationCommand computeAssembleCommand(
       String tempDir,
       String buildDir,
       CommandBuilder commandBuilder,
       List arguments,
       Map<String, String> environmentOverrides) {
 
-    var cc, shared;
+    var cc, shared, ld_flags;
     if (isAndroid) {
       var ndk = "third_party/android_tools/ndk";
       var triple;
       if (arch == "arm") {
         triple = "arm-linux-androideabi";
       } else if (arch == "arm64") {
         triple = "aarch64-linux-android";
       }
       var host;
       if (Platform.isLinux) {
         host = "linux";
       } else if (Platform.isMacOS) {
         host = "darwin";
       }
       cc = "$ndk/toolchains/$triple-4.9/prebuilt/$host-x86_64/bin/$triple-gcc";
       shared = '-shared';
     } else if (Platform.isLinux) {
       cc = 'gcc';
       shared = '-shared';
     } else if (Platform.isMacOS) {
       cc = 'clang';
       shared = '-dynamiclib';
+      // Tell Mac linker to give up generating eh_frame from dwarf.
+      ld_flags = '-Wl,-no_compact_unwind';
     } else {
       throw "Platform not supported: ${Platform.operatingSystem}";
     }
 
     var cc_flags;
     if (arch == 'x64') {
       cc_flags = "-m64";
     } else if (arch == 'simarm64') {
       cc_flags = "-m64";
     } else if (arch == 'ia32') {
       cc_flags = "-m32";
     } else if (arch == 'simarm') {
       cc_flags = "-m32";
     } else if (arch == 'simmips') {
       cc_flags = "-m32";
     } else if (arch == 'arm') {
       cc_flags = null;
     } else if (arch == 'arm64') {
       cc_flags = null;
     } else if (arch == 'mips') {
       cc_flags = "-EL";
     } else {
       throw "Architecture not supported: $arch";
     }
 
     var exec = cc;
-    var args = (cc_flags != null) ? [ shared, cc_flags ] : [ shared ];
-    args.addAll([
-      '-nostdlib',
-      '-o',
-      '$tempDir/out.aotsnapshot',
-      '$tempDir/out.S'
-    ]);
+    var args = [];
+    if (cc_flags != null) args.add(cc_flags);
+    if (ld_flags != null) args.add(ld_flags);
+    args.add(shared);
+    args.add('-nostdlib');
+    args.add('-o');
+    args.add('$tempDir/out.aotsnapshot');
+    args.add('$tempDir/out.S');
 
     return commandBuilder.getCompilationCommand('assemble', tempDir, !useSdk,
         bootstrapDependencies(buildDir), exec, args, environmentOverrides);
   }
 
   // This step reduces the amount of space needed to run the precompilation
   // tests by 60%.
   CompilationCommand computeRemoveAssemblyCommand(
       String tempDir,
       String buildDir,
@@ skipping 209 matching lines @@
       RuntimeConfiguration runtimeConfiguration,
       String buildDir,
       TestInformation info,
       List<String> vmOptions,
       List<String> sharedOptions,
       List<String> originalArguments,
       CommandArtifact artifact) {
     return <String>[];
   }
 }