GN: Fix skia build on mac, use -msse4.1 everywhere

skia/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/features.gni")
 import("//build/config/ui.gni")
 if (cpu_arch == "arm") {
   import("//build/config/arm.gni")
 }
 
@@ skipping 118 matching lines @@
   if (is_posix) {
     defines += [ "SK_USE_POSIX_THREADS" ]
   }
 
   if (is_android) {
     defines += [
       "SK_BUILD_FOR_ANDROID",
       "USE_CHROMIUM_SKIA",
     ]
   }
+
+  if (is_mac) {
+    defines += [ "SK_BUILD_FOR_MAC" ]
+  }
 }
 
 # Internal-facing config for Skia library code.
 config("skia_library_config") {
   # These include directories are only included for Skia code and are not
   # exported to dependents. It's not clear if this is on purpose, but this
   # matches the GYP build.
   include_dirs = []
   if (is_mac || is_ios) {
     include_dirs += [ "//third_party/skia/include/utils/mac" ]
@@ skipping 400 matching lines @@
     ]
 
     # SSE 4
     if (cpu_arch == "x86") {
       sources += [ "//third_party/skia/src/opts/SkBlitRow_opts_SSE4_asm.S" ]
     } else {  # x64
       sources += [ "//third_party/skia/src/opts/SkBlitRow_opts_SSE4_x64_asm.S" ]
     }
 
     if (is_linux || is_mac) {
-      cflags += [ "-msse4" ]
+      cflags += [ "-msse4.1" ]
     }
   } else if (cpu_arch == "arm") {
     sources = [
       "//third_party/skia/src/opts/SkBitmapProcState_opts_arm.cpp",
     ]
 
     # The assembly uses the frame pointer register (r7 in Thumb/r11 in
     # ARM), the compiler doesn't like that.
     cflags += [ "-fomit-frame-pointer" ]
 
@@ skipping 85 matching lines @@
     ":skia_config",
     "//build/config/compiler:no_chromium_code"
   ]
 
   deps = [
     "//base",
   ]
 
   visibility = ":skia"
 }