GN file updates to support using dbc.

runtime/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.
 
 # TODO(zra): These build arguments should likely be moved to a gni file that is
 # included in BUILD.gn files that care about the values of the flags. For now,
 # since the GN build only happens as part of a Mojo build there is no need for
 # the indirection.
 declare_args() {
   # Instead of using is_debug, we introduce a different flag for specifying a
   # Debug build of Dart so that clients can still use a Release build of Dart
   # while themselves doing a Debug build.
   dart_debug = false
 
   # Set the runtime mode. This affects how the runtime is built and what
   # features it has. Valid values are:
   # 'develop' (the default) - VM is built to run as a JIT with all development
   # features enabled.
   # 'profile' - The VM is built to run with AOT compiled code with only the
   # CPU profiling features enabled.
   # 'release' - The VM is built to run with AOT compiled code with no developer
   # features enabled.
   dart_runtime_mode = "develop"
 
   # Explicitly set the target architecture in case of precompilation. Leaving
   # this unspecified results in automatic target architecture detection.
   # Available options are: arm, arm64, mips, x64 and ia32
   dart_target_arch = ""
+
+  dart_experimental_interpreter = false
 }
 
 config("dart_public_config") {
   include_dirs = [
     ".",
   ]
 }
 
 # Controls PRODUCT #define.
 config("dart_product_config") {
@@ skipping 24 matching lines @@
       (dart_runtime_mode != "release")) {
     print("Invalid |dart_runtime_mode|")
     assert(false)
   }
 
   if (dart_runtime_mode == "release") {
     if (dart_debug) {
       print("Debug and release mode are mutually exclusive.")
     }
     assert(!dart_debug)
-    defines += ["DART_PRECOMPILED_RUNTIME"]
+
+    if (!dart_experimental_interpreter) {
+      defines += ["DART_PRECOMPILED_RUNTIME"]
+    }
   } else if (dart_runtime_mode == "profile") {
     if (dart_debug) {
       print("Debug and profile mode are mutually exclusive.")
     }
     assert(!dart_debug)
-    defines += ["DART_PRECOMPILED_RUNTIME"]
+
+    if (!dart_experimental_interpreter) {
+      defines += ["DART_PRECOMPILED_RUNTIME"]
+    }
   }
 }
 
 # Controls DART_PRECOMPILER #define.
 config("dart_precompiler_config") {
   defines = []
   defines += ["DART_PRECOMPILER"]
 }
 
 config("dart_config") {
   defines = []
 
+  if (dart_experimental_interpreter) {
+    dart_target_arch = "dbc"
+  }
+
   if (dart_target_arch != "") {
     if (dart_target_arch == "arm") {
       defines += [ "TARGET_ARCH_ARM" ]
     } else if (dart_target_arch == "arm64") {
       defines += [ "TARGET_ARCH_ARM64" ]
     } else if (dart_target_arch == "mips") {
       defines += [ "TARGET_ARCH_MIPS" ]
     } else if (dart_target_arch == "x64") {
       defines += [ "TARGET_ARCH_X64" ]
     } else if (dart_target_arch == "ia32") {
@@ skipping 104 matching lines @@
     "vm:libdart_lib_nosnapshot",
     "vm:libdart_lib",
     "vm:libdart_vm",
     "vm:libdart_platform",
     "third_party/double-conversion/src:libdouble_conversion",
   ]
   sources = [
     "vm/libdart_dependency_helper.cc",
   ]
 }