Fuchsia: Build standalone VM. Make it run "Hello, World!".

runtime/bin/BUILD.gn

 # 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.
 
 
 declare_args() {
   dart_io_support = false
 
   # TODO(zra, jamesr): Remove this check once we start building boringssl for
   # the fuchsia port.
@@ skipping 120 matching lines @@
     ":generate_builtin_cc_file",
     ":generate_io_cc_file",
     ":generate_io_patch_cc_file",
   ]
   include_dirs = [
     "..",
   ]
   set_sources_assignment_filter(["*_test.cc", "*_test.h"])
   sources = [
     "log_android.cc",
+    "log_fuchsia.cc",
     "log_linux.cc",
     "log_macos.cc",
     "log_win.cc",
   ] + builtin_impl_sources_gypi.sources
 }
 
 
 static_library("libdart_nosnapshot") {
   configs += ["..:dart_config",
               "..:dart_product_config",
@@ skipping 54 matching lines @@
 
   include_dirs = [
     "..",
   ]
 
   defines = [
     "DART_SHARED_LIB",
   ]
 }
 
-if ((current_toolchain == host_toolchain) ||
-    (!defined(is_fuchsia) || !is_fuchsia)) {
 io_impl_sources_gypi =
     exec_script("../../tools/gypi_to_gn.py",
                 [ rebase_path("io_impl_sources.gypi") ],
                 "scope",
                 [ "io_impl_sources.gypi" ])
-}
 
 if (current_toolchain == host_toolchain) {
 
 executable("gen_snapshot") {
   configs += ["..:dart_config",
               "..:dart_product_config",
               "..:dart_precompiler_config"]
   deps = [
     ":gen_resources_cc",
     ":gen_snapshot_dart_io",
@@ skipping 72 matching lines @@
 source_set("libdart_embedder_noio") {
   configs += ["..:dart_config",
               "..:dart_product_config",
               "..:dart_precompiled_runtime_config"]
   deps = [
     "..:libdart",
     "../vm:libdart_platform",
   ]
 }
 
-if (!defined(is_fuchsia) || !is_fuchsia) {
 
 # A source set for the implementation of 'dart:io' library
 # (without secure sockets).
 source_set("embedded_dart_io") {
   configs += ["..:dart_config",
               "..:dart_product_config",
               "..:dart_precompiled_runtime_config"]
 
   custom_sources_filter = [
     "*_test.cc",
     "*_test.h",
     "builtin.cc",
     "builtin_gen_snapshot.cc",
   ]
   if (!is_mac && !is_ios) {
     # Dart tree uses *_macos.* instead of *_mac.*
     custom_sources_filter += [
       "*_macos.h",
       "*_macos.cc",
     ]
   }
   set_sources_assignment_filter(custom_sources_filter)
 
   if (is_mac || is_ios) {
     libs = [
       "Security.framework",
     ]
+  } else if (defined(is_fuchsia) && is_fuchsia) {
+    defines = [
+      "DART_IO_SECURE_SOCKET_DISABLED"
+    ]
   } else {
     deps = [
       rebase_path(dart_boringssl_path, "."),
     ]
   }
 
   sources = io_impl_sources_gypi.sources + builtin_impl_sources_gypi.sources
   sources += [
     "builtin_nolib.cc",
     "builtin_natives.cc",
     "io_natives.cc",
     "io_natives.h",
     "embedded_dart_io.cc",
     "embedded_dart_io.h",
     "log_android.cc",
     "log_linux.cc",
     "log_macos.cc",
     "log_win.cc",
     "log.h",
   ]
   if (is_linux) {
     sources += [ "../../third_party/root_certificates/root_certificates.cc"]
   }
 
   include_dirs = [
     "..",
     "//third_party"
   ]
 }
-}  # !is_fuchsia
 
 
 action("generate_snapshot_bin") {
   deps = [
     "../bin:gen_snapshot($host_toolchain)",
   ]
 
   vm_isolate_snapshot = "$target_gen_dir/vm_isolate_snapshot.bin"
   isolate_snapshot = "$target_gen_dir/isolate_snapshot.bin"
   gen_snapshot_stamp_file = "$target_gen_dir/gen_snapshot.stamp"
@@ skipping 76 matching lines @@
     include_dirs = [
       "..",
       "../include"
     ]
 
     deps = [
       ":dart_snapshot_cc",
       ":libdart_embedder_noio",
     ]
   }
-}
+
+  copy("hello_fuchsia") {
+    sources = [ "hello_fuchsia.dart" ]
+    outputs = [ "$root_out_dir/hello_fuchsia.dart" ]
+  }
+
+  executable("dart_no_observatory") {
+    configs += ["..:dart_config",
+                "..:dart_product_config",
+                "..:dart_precompiled_runtime_config",]
+    deps = [
+      ":hello_fuchsia",
+      ":gen_resources_cc",
+      ":embedded_dart_io",
+      ":libdart_builtin",
+      "../vm:libdart_platform",
+      "..:libdart",
+      ":dart_snapshot_cc",
+      "//third_party/zlib",
+    ]
+
+    defines = [
+      "NO_OBSERVATORY",
+    ]
+
+    sources = [
+      "main.cc",
+      "observatory_assets_empty.cc",
+      "vmservice_impl.cc",
+      "vmservice_impl.h",
+      "$target_gen_dir/resources_gen.cc",
+    ]
+
+    include_dirs = [
+      "..",
+      "//third_party",
+    ]
+  }
+}  # defined(is_fuchsia) && is_fuchsia