Linux create_sdk GN build for host

build/config/compiler/BUILD.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.
 
 import("//build/config/android/config.gni")
 if (current_cpu == "arm") {
   import("//build/config/arm.gni")
 }
 if (current_cpu == "mipsel" || current_cpu == "mips64el") {
   import("//build/config/mips.gni")
@@ skipping 679 matching lines @@
       "-Wno-unused-function",  # http://crbug.com/505316
       "-Wno-unused-value",  # http://crbug.com/505318
       "-Wno-unused-local-typedef",  # http://crbug.com/411648
     ]
   }
 } else {
   # Common GCC warning setup.
   default_warning_flags += [
     # Enables.
     "-Wendif-labels",  # Weird old-style text after an #endif.
-    "-Werror",  # Warnings as errors.
 
     # Disables.
     "-Wno-missing-field-initializers",  # "struct foo f = {0};"
     "-Wno-unused-parameter",  # Unused function parameters.
   ]
 
   if (is_mac) {
     # TODO(abarth): Re-enable once https://github.com/domokit/mojo/issues/728
     #               is fixed.
     # default_warning_flags += [ "-Wnewline-eof" ]
@@ skipping 45 matching lines @@
 # Toggles between higher and lower warnings for code that is (or isn't)
 # part of Chromium.
 
 config("chromium_code") {
   if (is_win) {
     cflags = [ "/W4" ]  # Warning level 4.
   } else {
     cflags = [
       "-Wall",
       "-Wextra",
+      "-Werror",
     ]
 
     defines = []
     if (!using_sanitizer && (!is_linux || !is_clang)) {
       # _FORTIFY_SOURCE isn't really supported by Clang now, see
       # http://llvm.org/bugs/show_bug.cgi?id=16821.
       # It seems to work fine with Ubuntu 12 headers though, so use it in
       # official builds.
       #
       # Non-chromium code is not guaranteed to compile cleanly with
@@ skipping 167 matching lines @@
       cflags = [ "/Zi" ]  # Produce PDB file, no edit and continue.
     }
     ldflags = [ "/DEBUG" ]
   } else {
     cflags = [
       "-g3",
       "-ggdb3",
     ]
   }
 }