Fix standalone GN build.

Add dependencies and move the neon target to only be
specified for ARM builds so a standalone GN build can be
performed.

TESTED=Ran:
gn gen out/Release --args=is_debug=false
ninja -C out/Release

gn gen out/Debug --args=is_debug=true
ninja -C out/Debug

gn gen out/Debug --args="is_debug=true os=\"android\" "cpu_arch=\"arm\""
ninja -C out/Debug

gn gen out/Release --args="is_debug=false os=\"android\" "cpu_arch=\"arm\""
ninja -C out/Release

R=fbarchard@google.com

Review URL: https://webrtc-codereview.appspot.com/42289004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1317 16f28f9a-4ce2-e073-06de-1de4eb20be90

.gitignore

@@ -14,6 +14,7 @@ third_party/
 tools/android
 tools/clang
 tools/find_depot_tools.py
+tools/generate_library_loader
 tools/gn
 tools/gyp
 tools/memory

BUILD.gn

@@ -15,6 +15,8 @@ config("libyuv_config") {
   ]
 }
 
+use_neon = current_cpu == "arm" && (arm_use_neon || arm_optionally_use_neon)
+
 source_set("libyuv") {
   sources = [
     "include/libyuv.h",
@@ -90,25 +92,27 @@ source_set("libyuv") {
     "//third_party:jpeg",
   ]
 
-  if (current_cpu == "arm" && (arm_use_neon || arm_optionally_use_neon)) {
+  if (use_neon) {
     deps += [ ":libyuv_neon" ]
   }
 }
 
-static_library("libyuv_neon") {
-  sources = [
-    "source/compare_neon.cc",
-    "source/compare_neon64.cc",
-    "source/rotate_neon.cc",
-    "source/rotate_neon64.cc",
-    "source/row_neon.cc",
-    "source/row_neon64.cc",
-    "source/scale_neon.cc",
-    "source/scale_neon64.cc",
-  ]
+if (use_neon) {
+  static_library("libyuv_neon") {
+    sources = [
+      "source/compare_neon.cc",
+      "source/compare_neon64.cc",
+      "source/rotate_neon.cc",
+      "source/rotate_neon64.cc",
+      "source/row_neon.cc",
+      "source/row_neon64.cc",
+      "source/scale_neon.cc",
+      "source/scale_neon64.cc",
+    ]
 
-  public_configs = [ ":libyuv_config" ]
+    public_configs = [ ":libyuv_config" ]
 
-  configs -= [ "//build/config/compiler:compiler_arm_fpu" ]
-  cflags = [ "-mfpu=neon" ]
+    configs -= [ "//build/config/compiler:compiler_arm_fpu" ]
+    cflags = [ "-mfpu=neon" ]
+  }
 }

setup_links.py

@@ -43,11 +43,13 @@ DIRECTORIES = [
   'third_party/binutils',
   'third_party/libjpeg',
   'third_party/libjpeg_turbo',
+  'third_party/libudev',
   'third_party/llvm-build',
   'third_party/nss',
   'third_party/yasm',
   'tools/android',
   'tools/clang',
+  'tools/generate_library_loader',
   'tools/gn',
   'tools/gyp',
   'tools/memory',