Add support for building the Dart VM for Android OS.

dart.gyp

Index: dart.gyp
diff --git a/dart.gyp b/dart.gyp
index 1b62e45af165c3358b8180c1af485ce725034bdf..980a59c673db19d2fc6b7b171f6bc096d5a42ddb 100644
--- a/dart.gyp
+++ b/dart.gyp
@@ -21,6 +21,13 @@
         'runtime/dart-runtime.gyp:process_test',
         'runtime/dart-runtime.gyp:test_extension',
       ],
+      'conditions': [
+        ['dart_want_separate_host_toolset==1', {

[ahe, 2012/08/08 19:09:58]

Looks like this is being added everywhere. I'd like to avoid that.

What are you trying to do?

[jackpal, 2012/08/09 01:09:48]

This is left over from an attempt to get the full build to build cross-compiled.
I needed to build some targets (like dart2js) on the host vs. the target.

But I've given up on trying to get that to work, so these changes should be
removed. I'll do that.

+          'toolsets': ['host'],
+        }, {
+          'toolsets': ['target'],
+        }],
+      ]
     },
     {
       # Build the SDK. This target is separate from upload_sdk as the
@@ -66,6 +73,11 @@
             'compiler',
           ],
         }],
+        ['dart_want_separate_host_toolset==1', {
+            'toolsets': ['host'],
+          }, {
+            'toolsets': ['target'],
+          }],
       ],
     },
     {
@@ -93,6 +105,13 @@
           ],
         },
       ],
+      'conditions': [
+          ['dart_want_separate_host_toolset==1', {
+            'toolsets': ['host'],
+          }, {
+            'toolsets': ['target'],
+          }],
+      ],
     },
     {
       'target_name': 'dart2js',
@@ -100,6 +119,13 @@
       'dependencies': [
         'utils/compiler/compiler.gyp:dart2js',
       ],
+      'conditions': [
+          ['dart_want_separate_host_toolset==1', {
+            'toolsets': ['host'],
+          }, {
+            'toolsets': ['target'],
+          }],
+      ],
     },
     {
       'target_name': 'api_docs',
@@ -107,6 +133,13 @@
       'dependencies': [
         'utils/apidoc/apidoc.gyp:api_docs',
       ],
+      'conditions': [
+          ['dart_want_separate_host_toolset==1', {
+            'toolsets': ['host'],
+          }, {
+            'toolsets': ['target'],
+          }]
+    ],
     }
   ],
 }