Add isolate configure option

Author: paddybyers

configure

@@ -89,6 +89,11 @@ parser.add_option("--with-dtrace",
     dest="with_dtrace",
     help="Build with DTrace (experimental)")
 
+parser.add_option("--isolate",
+    action="store_true",
+    dest="isolate",
+    help="Build with Isolate support")
+
 # CHECKME does this still work with recent releases of V8?
 parser.add_option("--gdb",
     action="store_true",
@@ -151,6 +156,7 @@ def configure_node(o):
   o['variables']['node_use_dtrace'] = 'true' if options.with_dtrace else 'false'
   o['variables']['host_arch'] = host_arch()
   o['variables']['target_arch'] = target_arch()
+  o['variables']['node_isolate'] = 'true' if options.isolate else 'false'
 
   # TODO move to node.gyp
   if sys.platform == 'sunos5':

node.gyp

@@ -8,6 +8,7 @@
     'node_use_dtrace': 'false',
     'node_use_openssl%': 'true',
     'node_use_system_openssl%': 'false',
+    'node_isolate': 'true',
     'library_files': [
       'src/node.js',
       'lib/_debugger.js',
@@ -138,6 +139,13 @@
         }, {
           'defines': [ 'HAVE_OPENSSL=0' ]
         }],
+        
+        [ 'node_isolate=="true"', {
+          'defines': [
+            'NODE_FORK_ISOLATE',
+            'NODE_LIBRARY'
+          ],
+        }],
 
         [ 'node_use_dtrace=="true"', {
           'sources': [