GN: mac host and armv7 target

gn/BUILDCONFIG.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.
 
 # It's best to keep the names and defaults of is_foo flags consistent with Chrome.
 
 declare_args() {
   is_debug = true
   is_component_build = false
   ndk = ""
 }
 
 # Platform detection
 if (target_os == "") {
   target_os = host_os
   if (ndk != "") {
     target_os = "android"
   }
 }
 if (current_os == "") {
   current_os = target_os
 }
 
+is_android = current_os == "android"
+is_fuchsia = current_os == "fuchsia"
+is_ios = current_os == "ios"
+is_linux = current_os == "linux"
+is_mac = current_os == "mac"
+is_win = current_os == "win"
+
 if (target_cpu == "") {
   target_cpu = host_cpu
-  if (ndk != "") {
+  if (is_android) {
     target_cpu = "arm64"
   }
 }
 if (current_cpu == "") {
   current_cpu = target_cpu
 }
 
-is_android = current_os == "android"
-is_fuchsia = current_os == "fuchsia"
-is_ios = current_os == "ios"
-is_linux = current_os == "linux"
-is_mac = current_os == "mac"
-is_win = current_os == "win"
-
-is_posix = !is_win
-
 if (is_android) {
   ndk_host = ""
   ndk_target = ""
   ndk_platform = ""
   ndk_stdlib = ""
+  nkd_gccdir = ""
 
-  if (host_os == "linux" && host_cpu == "x64") {
+  if (host_os == "linux") {
     ndk_host = "linux-x86_64"
+  } else if (host_os == "mac") {
+    ndk_host = "darwin-x86_64"
   }
+
   if (target_cpu == "arm64") {
     ndk_target = "aarch64-linux-android"
     ndk_platform = "android-21/arch-arm64"
     ndk_stdlib = "arm64-v8a"
+    ndk_gccdir = ndk_target
+  } else if (target_cpu == "arm") {
+    ndk_target = "arm-linux-androideabi"
+    ndk_platform = "android-18/arch-arm"
+    ndk_stdlib = "armeabi-v7a"
+    ndk_gccdir = ndk_target
+  } else if (target_cpu == "mips64el") {
+    ndk_target = "mips64el-linux-android"
+    ndk_platform = "android-21/arch-mips64"
+    ndk_stdlib = "mips64"
+    ndk_gccdir = ndk_target
+  } else if (target_cpu == "mipsel") {
+    ndk_target = "mipsel-linux-android"
+    ndk_platform = "android-18/arch-mips"
+    ndk_stdlib = "mips"
+    ndk_gccdir = ndk_target
+  } else if (target_cpu == "x64") {
+    ndk_target = "x86_64-linux-android"
+    ndk_platform = "android-21/arch-x86_64"
+    ndk_stdlib = "x86_64"
+    ndk_gccdir = ndk_stdlib
+  } else if (target_cpu == "x86") {
+    ndk_target = "i686-linux-android"
+    ndk_platform = "android-18/arch-x86"
+    ndk_stdlib = "x86"
+    ndk_gccdir = ndk_stdlib
   }
 }
 
 # A component is either a static or a shared library.
 template("component") {
   _component_mode = "static_library"
   if (is_component_build) {
     _component_mode = "shared_library"
   }
 
@@ skipping 29 matching lines @@
 
 set_defaults("component") {
   configs = default_configs
   if (!is_component_build) {
     complete_static_lib = true
   }
 }
 
 # For now, we support GCC-like toolchains, including Clang.
 set_default_toolchain("//gn:gcc_like")