[Chromecast] Include all stdlibc++/libgcc symbols in cast_shell.

build/config/BUILDCONFIG.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # =============================================================================
 # PLATFORM SELECTION
 # =============================================================================
 #
 # There are two main things to set: "os" and "cpu". The "toolchain" is the name
 # of the GN thing that encodes combinations of these things.
@@ skipping 466 matching lines @@
   ]
 }
 
 # Debug/release-related defines.
 if (is_debug) {
   _native_compiler_configs += [ "//build/config:debug" ]
 } else {
   _native_compiler_configs += [ "//build/config:release" ]
 }
 
-# Windows linker setup for EXEs and DLLs.
 if (is_win) {
+  # Many targets remove these configs, so they are not contained within
+  # //build/config:executable_config for easy removal.
   _windows_linker_configs = [
     "//build/config/win:default_incremental_linking",
-    "//build/config/win:sdk_link",
-    "//build/config/win:common_linker_setup",
 
     # Default to console-mode apps. Most of our targets are tests and such
     # that shouldn't use the windows subsystem.
     "//build/config/win:console",
   ]
 }
 
 # Executable defaults.
-_executable_configs =
-    _native_compiler_configs + [ "//build/config:default_libs" ]
+_executable_configs = _native_compiler_configs + [
+                        "//build/config:default_libs",
+                        "//build/config:executable_config",
+                      ]
 if (is_win) {
   _executable_configs += _windows_linker_configs
-} else if (is_mac) {
-  _executable_configs += [
-    "//build/config/mac:mac_dynamic_flags",
-    "//build/config/mac:mac_executable_flags",
-  ]
-} else if (is_linux || is_android) {
-  _executable_configs += [ "//build/config/gcc:executable_ldconfig" ]
-  if (is_android) {
-    _executable_configs += [ "//build/config/android:executable_config" ]
-  }
 }
 set_defaults("executable") {
   configs = _executable_configs
 }
 
 # Static library defaults.
 set_defaults("static_library") {
   configs = _native_compiler_configs
 }
 
 # Shared library and loadable module defaults (also for components in component
 # mode).
-_shared_library_configs =
-    _native_compiler_configs + [ "//build/config:default_libs" ]
+_shared_library_configs = _native_compiler_configs + [
+                            "//build/config:default_libs",
+                            "//build/config:shared_library_config",
+                          ]
 if (is_win) {
   _shared_library_configs += _windows_linker_configs
-} else if (is_mac) {
-  _shared_library_configs += [ "//build/config/mac:mac_dynamic_flags" ]
 } else if (is_android) {
   # Strip native JNI exports from shared libraries by default. Binaries that
   # want this can remove this config.
   _shared_library_configs +=
       [ "//build/config/android:hide_native_jni_exports" ]
 }
 set_defaults("shared_library") {
   configs = _shared_library_configs
 }
 set_defaults("loadable_module") {
@@ skipping 38 matching lines @@
     forward_variables_from(invoker, "*")
 
     # All shared libraries must have the sanitizer deps to properly link in
     # asan mode (this target will be empty in other cases).
     if (!defined(deps)) {
       deps = []
     }
     deps += [ "//build/config/sanitizers:deps" ]
   }
 }