GN: Make wtf_unittests build on mac/clang

Source/BUILD.gn

 # Copyright 2014 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.
 
 import("config.gni")
 if (is_clang) {
   import("//build/config/clang/clang.gni")
 }
 
 # features ---------------------------------------------------------------------
@@ skipping 12 matching lines @@
 }
 
 # config -----------------------------------------------------------------------
 
 config("config") {
   include_dirs = [ ".", ".." ]
 
   cflags = []
   defines = []
 
+  configs = [ ":non_test_config" ]
+
   if (is_win) {
     cflags += [
       "/wd4305",  # Truncation from 'type1' to 'type2'.
       "/wd4324",  # Struct padded due to declspec(align).
       "/wd4714",  # Function marked forceinline not inlined.
       "/wd4800",  # Value forced to bool.
       "/wd4996",  # Deprecated function call.
     ]
   }
 
@@ skipping 10 matching lines @@
     cflags_cc = [ "-Wno-c++0x-compat" ]
   }
 
   if (is_linux && cpu_arch == "arm") {
     # Due to a bug in gcc arm, we get warnings about uninitialized
     # timesNewRoman.unstatic.3258 and colorTransparent.unstatic.4879.
     cflags += [ "-Wno-uninitialized" ]
   }
 
   if (is_clang) {
-    cflags += [ "-Wglobal-constructors" ]
     if (blink_gc_plugin && clang_use_chrome_plugins) {
       # TODO(GYP)
       #'cflags': ['<!@(../../../tools/clang/scripts/blink_gc_plugin_flags.sh enable-oilpan=<(enable_oilpan) dump-graph=<(blink_gc_plugin_dump_graph))'],
     }
   }
 }
 
+# The follow configs apply to all targets except for unit tests, which rely on static

[brettw, 2014/06/03 21:14:03]

80 cols

+# initializers. This config is included by everything that uses ":config" and then removed
+# for unit test targets.
+config("non_test_config") {
+  cflags = []
+
+  if (is_clang) {
+    cflags += [ "-Wglobal-constructors" ]
+  }
+}
+
 # stubs ------------------------------------------------------------------------
 
 # These set up include paths for targets that haven't been converted yet. They
 # can be removed when the corresponding targets have been converted to GN.
 config("npapi_stub") {
   include_dirs = [ "//third_party/npapi", "//third_party/npapi/bindings" ]
 }