[Chromecast] Introduce cast_{shared_library|executable}.

This is a temporary workaround to allow the component build to work
until crbug.com/746091 is resolved. This introduces a dependency on
libc++ when use_custom_libcxx is true.

BUG=746091

Change-Id: I14ae65c0ac7d986649f5f70b47b0ad6f37ceff89
Reviewed-on: https://chromium-review.googlesource.com/578554Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Reviewed-by: Luke Halliwell <halliwell@chromium.org>
Commit-Queue: Stephen Lanham <slan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488237}

chromecast/BUILD.gn

@@ -393,7 +393,7 @@ group("cast_shell_lib") {
   }
 }
 
-executable("cast_shell") {
+cast_executable("cast_shell") {
   sources = [
     "app/cast_main.cc",
   ]

chromecast/android/BUILD.gn

@@ -17,7 +17,7 @@ source_set("platform_jni_loader") {
   ]
 }
 
-shared_library("libcast_shell_android") {
+cast_shared_library("libcast_shell_android") {
   sources = [
     "//chromecast/app/android/cast_jni_loader.cc",
     "cast_jni_registrar.cc",

chromecast/base/BUILD.gn

@@ -178,7 +178,7 @@ source_set("cast_sys_info") {
 
 # Target for OEM partners to override sys_info shared library, i.e.
 # libcast_sys_info_1.0.so.
-shared_library("libcast_sys_info_1.0") {
+cast_shared_library("libcast_sys_info_1.0") {
   sources = [
     "cast_sys_info_dummy.cc",
     "cast_sys_info_dummy.h",

chromecast/chromecast.gni

@@ -68,3 +68,25 @@ if (chromecast_branding == "public") {
 # reference for all GN files referencing a locales list. |locales| is declared
 # in //build/config/locales.gni.
 cast_locales = locales
+
+# These templates are a temporary fix fo link libc++ into shared libraries and
+# executables. These should be removed as soon as crbug.com/746091 is resolved.
+template("cast_shared_library") {
+  shared_library(target_name) {
+    forward_variables_from(invoker, "*")
+    if (!defined(deps)) {
+      deps = []
+    }
+    deps += [ "//build/config:exe_and_shlib_deps" ]
+  }
+}
+
+template("cast_executable") {
+  executable(target_name) {
+    forward_variables_from(invoker, "*")
+    if (!defined(deps)) {
+      deps = []
+    }
+    deps += [ "//build/config:exe_and_shlib_deps" ]
+  }
+}

chromecast/crash/BUILD.gn

@@ -48,7 +48,7 @@ source_set("crash") {
   }
 }
 
-executable("crash_uploader") {
+cast_executable("crash_uploader") {
   sources = [
     "linux/crash_uploader.cc",
   ]

chromecast/graphics/BUILD.gn

@@ -53,7 +53,7 @@ source_set("graphics") {
   }
 }
 
-shared_library("libcast_graphics_1.0") {
+cast_shared_library("libcast_graphics_1.0") {
   sources = [
     "cast_egl_platform_default.cc",
     "graphics_properties_default.cc",

chromecast/media/cma/backend/BUILD.gn

@@ -53,7 +53,7 @@ source_set("cast_media_android_dummy") {
 # Target for OEM partners to override media shared library, i.e.
 # libcast_media_1.0.so. This target is only used to build executables
 # with correct linkage information.
-shared_library("libcast_media_1.0") {
+cast_shared_library("libcast_media_1.0") {
   if (is_cast_desktop_build) {
     deps = [
       ":default",

chromecast/media/cma/backend/alsa/BUILD.gn

@@ -17,7 +17,7 @@ declare_args() {
 # Alsa must be used for these targets to build.
 assert(use_alsa)
 
-shared_library("libcast_media_1.0_audio") {
+cast_shared_library("libcast_media_1.0_audio") {
   sources = [
     "cast_media_shlib.cc",
     "media_codec_support_cast_audio.cc",
@@ -162,7 +162,7 @@ source_set("test_support") {
 
 # This is separate from ":governor" because the associated unittest needs
 # to create a Governor directly (to use test functions).
-shared_library("libcast_governor_1.0") {
+cast_shared_library("libcast_governor_1.0") {
   sources = [
     "post_processors/governor_create.cc",
   ]
@@ -186,7 +186,7 @@ source_set("governor") {
   public_configs = [ "//chromecast/public:public_config" ]
 }
 
-shared_library("libcast_saturated_gain_1.0") {
+cast_shared_library("libcast_saturated_gain_1.0") {
   sources = [
     "post_processors/saturated_gain.cc",
     "post_processors/saturated_gain.h",

chromecast/system/reboot/BUILD.gn

@@ -37,7 +37,7 @@ test("cast_reboot_unittests") {
 
 # Target for OEM partners to override reboot shared library, i.e.
 # libcast_reboot_1.0.so.
-shared_library("libcast_reboot_1.0") {
+cast_shared_library("libcast_reboot_1.0") {
   sources = [
     "reboot_dummy.cc",
   ]