Standalone support for AOT as dylibs on Fuchsia.

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.
 
 import("gypi_contents.gni")
 import("../runtime_args.gni")
+import("../../build/compiled_action.gni")
 
 # Generate a resources.cc file for the service isolate without Observatory.
 action("gen_resources_cc") {
   visibility = [ ":*" ]  # Only targets in this file can see this.
   script = "../tools/create_resources.py"
   inputs = [
     "../tools/create_resources.py",
   ]
 
   # The path below is hard coded for the Mojo and Flutter trees. When moving
@@ skipping 667 matching lines @@
     "$target_gen_dir/cached_patches_gen.cc",
     "$target_gen_dir/web_gl_gen.cc",
     "$target_gen_dir/metadata_gen.cc",
     "$target_gen_dir/web_sql_gen.cc",
     "$target_gen_dir/svg_gen.cc",
     "$target_gen_dir/web_audio_gen.cc",
   ]
 }
 
 if (defined(is_fuchsia) && is_fuchsia) {
+  hello_fuchsia_source = rebase_path("../tests/vm/dart/hello_fuchsia_test.dart")
+
   copy("hello_fuchsia") {
     sources = [
-      "../tests/vm/dart/hello_fuchsia_test.dart",
+      hello_fuchsia_source,
     ]
     outputs = [
       "$root_out_dir/hello_fuchsia.dart",
     ]
   }
+
+  hello_fuchsia_assembly = "$target_gen_dir/hello_fuchsia.S"
+
+  compiled_action("hello_fuchsia_assembly") {
+    inputs = [
+      hello_fuchsia_source,
+    ]
+    outputs = [
+      hello_fuchsia_assembly,
+    ]
+    tool = ":dart_bootstrap"
+    args = [
+      "--snapshot-kind=app-aot",
+      "--snapshot=" + rebase_path(hello_fuchsia_assembly),
+      hello_fuchsia_source,
+    ]
+  }
+
+  shared_library("hello_fuchsia_dylib") {
+    deps = [
+      ":hello_fuchsia_assembly",
+    ]
+    sources = [
+      hello_fuchsia_assembly,
+    ]
+    cflags = [
+      "-nostdlib",
+      "-nostartfiles",
+    ]
+    output_name = "hello_fuchsia"
+  }
 }
 
 executable("process_test") {
   sources = [
     "process_test.cc",
   ]
 }
 
 action("generate_snapshot_test_dat_file") {
   snapshot_test_dat_file = "$root_gen_dir/snapshot_test.dat"
@@ skipping 114 matching lines @@
   ]
   if (is_linux || is_android) {
     cflags = [ "-fPIC" ]
   }
   if (is_win) {
     libs = [ "dart.lib" ]
     abs_root_out_dir = rebase_path(root_out_dir)
     ldflags = [ "/LIBPATH:$abs_root_out_dir" ]
   }
 }