Initial checkin of chromecast content embedder (cast_shell) and related build scripts.

chromecast/build/build_env_arm_chromecast.sh

+# Copyright (c) 2014 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.
+
+function setup_chromium_env_arm_chromecast() {
+  setup_chromium_env_common arm_chromecast $@
+
+  local tc_old="${CHROME_SRCROOT}/../../prebuilt/toolchain/arm-unknown-linux-gnueabi-4.5.3-glibc/bin/arm-unknown-linux-gnueabi"
+  local tc_new="${CHROME_SRCROOT}/../../prebuilt/toolchain/armv7a/bin/armv7a-cros-linux-gnueabi"
+  if [[ -e ${tc_old}-gcc ]]; then
+    tc=${tc_old}
+  elif [[ -e ${tc_new}-gcc ]]; then
+    tc=${tc_new}
+  else
+    echo "could not find toolchain"
+    exit 1
+  fi
+  setup_build_toolchain "${tc}"
+
+  setup_chromium_env_common_chromecast
+
+  # If using a hardfloat toolchain, set the gyp defines for it.
+  if [[ ! -e ${CHROME_SRCROOT}/../../prebuilt/toolchain/arm-unknown-linux-gnueabi-4.5.3-glibc/bin/arm-unknown-linux-gnueabi-gcc &&
+        ( -e ${CHROME_SRCROOT}/../../prebuilt/toolchain/armv7a/bin/armv7a-cros-linux-gnueabi-gcc ||
+          -e `which armv7a-cros-linux-gnueabi-gcc` ) ]]; then
+    export GYP_DEFINES="${GYP_DEFINES} arm_float_abi=hard v8_use_arm_eabi_hardfloat=true"
+  fi
+
+  # Check if widevine is available.
+  if [ -d "${CHROME_SRCROOT}/chromecast/internal/widevine_cdm" ]; then
+    export GYP_DEFINES="${GYP_DEFINES} use_widevine=1"
+  fi
+
+  # Check if playready is available.
+  if [ -d "${CHROME_SRCROOT}/chromecast/internal/playready_cdm" ]; then
+    export GYP_DEFINES="${GYP_DEFINES} use_playready=1"
+  fi
+
+  # - arm_thumb=1: turn on Thumb mode for a smaller executable.
+  # - armv7=1: We are using a Cortex A9 which support Arm V7.
+  # - cast_uses_directfb=0 (use MARVELL's graphics directly)
+  # - chromecast_branding=Chrome: Whether this is internal release build
+  #   (Chrome) or public build (Chromium)
+  # - linux_use_gold_binary=0: Don't use gold linker.
+  # - linux_use_gold_flags=0: Don't use gold specific flags.
+  # - sysroot: Set the build sysroot directory
+  # - target_arch=arm : this is ARM.
+  # - use_alsa=0
+  # - use_libjpeg_turbo=1: Use libjpeg_turbo for arm build
+  # - use_pulseaudio=0
+  # - use_system_libjpeg=0
+  # - video_hole=1: Enable video hole punching
+  local defines="
+arm_arch=''

[jam, 2014/04/04 01:01:24]

i wonder if this stuff better belongs in build/common.gypi, so that when i set
"chromecast=1" in my chromium.gyp_env, all this is setup for free.

[lcwu1, 2014/04/05 01:17:13]

Yes, I too prefer what you suggested. (In fact, in our local fork, most of these
gyp variables are set in common.gypi. It's our cleanup for upstreaming that
brought these gyp variables setting here. :-)

[jam, 2014/04/07 17:32:01]

I see. ok btw this is what android does (they set a bunch of flags based on
os==android):
https://code.google.com/p/chromium/codesearch#chromium/src/build/common.gypi&...

+arm_tune='cortex-a9'
+arm_thumb=1
+armv7=1
+cast_uses_directfb=0
+chromecast_branding=Chrome
+linux_use_gold_binary=0
+linux_use_gold_flags=0
+sysroot=${CHROME_SRCROOT}/../../${TARGET_OUT_TOOLCHAIN:-out/target/product/anchovy/build_sysroot}
+target_arch=arm
+use_alsa=0
+use_libjpeg_turbo=1
+use_pulseaudio=0
+use_system_libjpeg=0
+video_hole=1
+"
+
+  export GYP_DEFINES="${GYP_DEFINES} ${defines}"
+}
+
+function setup_chrome_env_arm_chromecast() {
+  setup_chromium_env_arm_chromecast $@
+  brand_as_chrome
+}