GN: mac host and armv7 target

BUILD.gn

 # Copyright 2016 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 declare_args() {
   skia_enable_tools = !is_fuchsia && !is_component_build
 
   skia_use_expat = true
   skia_use_giflib = !is_fuchsia
@@ skipping 197 matching lines @@
   sources = opts_gypi.sse42_sources
   cflags = [ "-msse4.2" ]
 }
 
 opts("avx") {
   enabled = is_x86
   sources = opts_gypi.avx_sources
   cflags = [ "-mavx" ]
 }
 
+opts("dsp") {
+  enabled = current_cpu == "mipsel"
+  sources = opts_gypi.mips_dsp_sources
+  cflags = [ "-Wno-deprecated-register" ]  # FIXME
+}
+
 # Any feature of Skia that requires third-party code should be optional and use this template.
 template("optional") {
   if (invoker.enabled) {
     config(target_name + "_public") {
       defines = invoker.public_defines
     }
     source_set(target_name) {
       forward_variables_from(invoker, "*", [ "public_defines" ])
       all_dependent_configs = [ ":" + target_name + "_public" ]
       configs += skia_library_configs
@@ skipping 99 matching lines @@
 
 component("skia") {
   public_configs = [ ":skia_public" ]
   configs += skia_library_configs
 
   deps = [
     ":arm64",
     ":armv7",
     ":avx",
     ":crc32",
+    ":dsp",
     ":gif",
     ":jpeg",
     ":none",
     ":pdf",
     ":png",
     ":sse2",
     ":sse41",
     ":sse42",
     ":ssse3",
     ":webp",
@@ skipping 419 matching lines @@
       "tools/SkShaper_harfbuzz.cpp",
       "tools/using_skia_and_harfbuzz.cpp",
     ]
     deps = [
       ":skia",
       "//third_party/harfbuzz",
     ]
     testonly = true
   }
 }