src/build/android/envsetup_functions.sh - cobalt - Git at Google

 #!/bin/bash

 # Copyright (c) 2012 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.

 # Defines functions for envsetup.sh which sets up environment for building
 # Chromium on Android.  The build can be either use the Android NDK/SDK or
 # android source tree.  Each has a unique init function which calls functions
 # prefixed with "common_" that is common for both environment setups.

 ################################################################################
 # Check to make sure the toolchain exists for the NDK version.
 ################################################################################
 common_check_toolchain() {
   if [[ ! -d "${ANDROID_TOOLCHAIN}" ]]; then
     echo "Can not find Android toolchain in ${ANDROID_TOOLCHAIN}." >& 2
     echo "The NDK version might be wrong." >& 2
     return 1
   fi
 }

 ################################################################################
 # Exports environment variables common to both sdk and non-sdk build (e.g. PATH)
 # based on CHROME_SRC and ANDROID_TOOLCHAIN, along with DEFINES for GYP_DEFINES.
 ################################################################################
 common_vars_defines() {
   # Set toolchain path according to product architecture.
   case "${TARGET_ARCH}" in
     "arm")
       toolchain_arch="arm-linux-androideabi"
       ;;
     "x86")
       toolchain_arch="x86"
       ;;
     *)
       echo "TARGET_ARCH: ${TARGET_ARCH} is not supported." >& 2
       print_usage
       return 1
       ;;
   esac

   toolchain_version="4.6"
   # We directly set the gcc_version since we know what we use, and it should
   # be set to xx instead of x.x. Refer the output of compiler_version.py.
   gcc_version="46"
   toolchain_target=$(basename \
     ${ANDROID_NDK_ROOT}/toolchains/${toolchain_arch}-${toolchain_version})
   toolchain_path="${ANDROID_NDK_ROOT}/toolchains/${toolchain_target}"\
 "/prebuilt/${toolchain_dir}/bin/"

   # Set only if not already set.
   # Don't override ANDROID_TOOLCHAIN if set by Android configuration env.
   export ANDROID_TOOLCHAIN=${ANDROID_TOOLCHAIN:-${toolchain_path}}

   common_check_toolchain

   # Add Android SDK/NDK tools to system path.
   export PATH=$PATH:${ANDROID_NDK_ROOT}
   export PATH=$PATH:${ANDROID_SDK_ROOT}/tools
   export PATH=$PATH:${ANDROID_SDK_ROOT}/platform-tools

   # This must be set before ANDROID_TOOLCHAIN, so that clang could find the
   # gold linker.
   # TODO(michaelbai): Remove this path once the gold linker become the default
   # linker.
   export PATH=$PATH:${CHROME_SRC}/build/android/${toolchain_arch}-gold

   # Must have tools like arm-linux-androideabi-gcc on the path for ninja
   export PATH=$PATH:${ANDROID_TOOLCHAIN}

   # Add Chromium Android development scripts to system path.
   # Must be after CHROME_SRC is set.
   export PATH=$PATH:${CHROME_SRC}/build/android

   # TODO(beverloo): Remove these once all consumers updated to --strip-binary.
   export OBJCOPY=$(echo ${ANDROID_TOOLCHAIN}/*-objcopy)
   export STRIP=$(echo ${ANDROID_TOOLCHAIN}/*-strip)

   # The set of GYP_DEFINES to pass to gyp. Use 'readlink -e' on directories
   # to canonicalize them (remove double '/', remove trailing '/', etc).
   DEFINES="OS=android"
   DEFINES+=" host_os=${host_os}"
   DEFINES+=" gcc_version=${gcc_version}"

   if [[ -n "$CHROME_ANDROID_OFFICIAL_BUILD" ]]; then
     DEFINES+=" branding=Chrome"
     DEFINES+=" buildtype=Official"

     # These defines are used by various chrome build scripts to tag the binary's
     # version string as 'official' in linux builds (e.g. in
     # chrome/trunk/src/chrome/tools/build/version.py).
     export OFFICIAL_BUILD=1
     export CHROMIUM_BUILD="_google_chrome"
     export CHROME_BUILD_TYPE="_official"

     # Used by chrome_version_info_posix.cc to display the channel name.
     # Valid values: "unstable", "stable", "dev", "beta".
     export CHROME_VERSION_EXTRA="beta"
   fi

   # The order file specifies the order of symbols in the .text section of the
   # shared library, libchromeview.so.  The file is an order list of section
   # names and the library is linked with option
   # --section-ordering-file=<orderfile>. The order file is updated by profiling
   # startup after compiling with the order_profiling=1 GYP_DEFINES flag.
   ORDER_DEFINES="order_text_section=${CHROME_SRC}/orderfiles/orderfile.out"

   # The following defines will affect ARM code generation of both C/C++ compiler
   # and V8 mksnapshot.
   case "${TARGET_ARCH}" in
     "arm")
       DEFINES+=" arm_neon=0 armv7=1 arm_thumb=1 arm_fpu=vfpv3-d16"
       DEFINES+=" arm_neon_optional=1"  # Enable dynamic NEON support.
       DEFINES+=" ${ORDER_DEFINES}"
       DEFINES+=" target_arch=arm"
       ;;
     "x86")
     # TODO(tedbo): The ia32 build fails on ffmpeg, so we disable it here.
       DEFINES+=" use_libffmpeg=0"

       host_arch=$(uname -m | sed -e \
         's/i.86/ia32/;s/x86_64/x64/;s/amd64/x64/;s/arm.*/arm/;s/i86pc/ia32/')
       DEFINES+=" host_arch=${host_arch}"
       DEFINES+=" target_arch=ia32"
       ;;
     *)
       echo "TARGET_ARCH: ${TARGET_ARCH} is not supported." >& 2
       print_usage
       return 1
   esac

   DEFINES+=" android_gdbserver=${ANDROID_NDK_ROOT}/prebuilt/\
 android-${TARGET_ARCH}/gdbserver/gdbserver"
 }


 ################################################################################
 # Exports common GYP variables based on variable DEFINES and CHROME_SRC.
 ################################################################################
 common_gyp_vars() {
   export GYP_DEFINES="${DEFINES}"

   # Set GYP_GENERATORS to make-android if it's currently unset or null.
   export GYP_GENERATORS="${GYP_GENERATORS:-make-android}"

   # Use our All target as the default
   export GYP_GENERATOR_FLAGS="${GYP_GENERATOR_FLAGS} default_target=All"

   # We want to use our version of "all" targets.
   export CHROMIUM_GYP_FILE="${CHROME_SRC}/build/all_android.gyp"
 }


 ################################################################################
 # Prints out help message on usage.
 ################################################################################
 print_usage() {
   echo "usage: ${0##*/} [--target-arch=value] [--help]" >& 2
   echo "--target-arch=value     target CPU architecture (arm=default, x86)" >& 2
   echo "--try-32bit-host        try building a 32-bit host architecture" >&2
   echo "--help                  this help" >& 2
 }

 ################################################################################
 # Process command line options.
 # --target-arch=  Specifices target CPU architecture. Currently supported
 #                 architectures are "arm" (default), and "x86".
 # --help          Prints out help message.
 ################################################################################
 process_options() {
   try_32bit_host_build=
   while [[ $1 ]]; do
     case "$1" in
       --target-arch=*)
         target_arch="$(echo "$1" | sed 's/^[^=]*=//')"
         ;;
       --try-32bit-host)
         try_32bit_host_build=true
         ;;
       --help)
         print_usage
         return 1
         ;;
       *)
         # Ignore other command line options
         echo "Unknown option: $1"
         ;;
     esac
     shift
   done

   # Sets TARGET_ARCH. Defaults to arm if not specified.
   TARGET_ARCH=${target_arch:-arm}
 }

 ################################################################################
 # Initializes environment variables for NDK/SDK build. Only Android NDK Revision
 # 7 on Linux or Mac is offically supported. To run this script, the system
 # environment ANDROID_NDK_ROOT must be set to Android NDK's root path.  The
 # ANDROID_SDK_ROOT only needs to be set to override the default SDK which is in
 # the tree under $ROOT/src/third_party/android_tools/sdk.
 # To build Chromium for Android with NDK/SDK follow the steps below:
 #  > export ANDROID_NDK_ROOT=<android ndk root>
 #  > export ANDROID_SDK_ROOT=<android sdk root> # to override the default sdk
 #  > . build/android/envsetup.sh
 #  > make
 ################################################################################
 sdk_build_init() {
   # If ANDROID_NDK_ROOT is set when envsetup is run, use the ndk pointed to by
   # the environment variable.  Otherwise, use the default ndk from the tree.
   if [[ -z "${ANDROID_NDK_ROOT}" || ! -d "${ANDROID_NDK_ROOT}" ]]; then
     export ANDROID_NDK_ROOT="${CHROME_SRC}/third_party/android_tools/ndk/"
   fi

   # If ANDROID_SDK_ROOT is set when envsetup is run, and if it has the
   # right SDK-compatible directory layout, use the sdk pointed to by the
   # environment variable.  Otherwise, use the default sdk from the tree.
   local sdk_suffix=platforms/android-${ANDROID_SDK_VERSION}
   if [[ -z "${ANDROID_SDK_ROOT}" || \
        ! -d "${ANDROID_SDK_ROOT}/${sdk_suffix}" ]]; then
     export ANDROID_SDK_ROOT="${CHROME_SRC}/third_party/android_tools/sdk/"
   fi

   unset ANDROID_BUILD_TOP

   # Set default target.
   export TARGET_PRODUCT="${TARGET_PRODUCT:-trygon}"

   # Unset toolchain so that it can be set based on TARGET_PRODUCT.
   # This makes it easy to switch between architectures.
   unset ANDROID_TOOLCHAIN

   common_vars_defines

   DEFINES+=" sdk_build=1"

   # Sets android specific directories to NOT_SDK_COMPLIANT.  This will allow
   # android_gyp to generate make files, but will cause errors when (and only
   # when) building targets that depend on these directories.
   DEFINES+=" android_src='NOT_SDK_COMPLIANT'"
   DEFINES+=" android_product_out=${CHROME_SRC}/out/android"
   DEFINES+=" android_lib='NOT_SDK_COMPLIANT'"
   DEFINES+=" android_static_lib='NOT_SDK_COMPLIANT'"
   DEFINES+=" android_sdk=${ANDROID_SDK_ROOT}/${sdk_suffix}"
   DEFINES+=" android_sdk_root=${ANDROID_SDK_ROOT}"
   DEFINES+=" android_sdk_tools=${ANDROID_SDK_ROOT}/platform-tools"
   DEFINES+=" android_sdk_version=${ANDROID_SDK_VERSION}"
   DEFINES+=" android_toolchain=${ANDROID_TOOLCHAIN}"

   common_gyp_vars

   if [[ -n "$CHROME_ANDROID_BUILD_WEBVIEW" ]]; then
     # Can not build WebView with NDK/SDK because it needs the Android build
     # system and build inside an Android source tree.
     echo "Can not build WebView with NDK/SDK.  Requires android source tree." \
         >& 2
     echo "Try . build/android/envsetup.sh instead." >& 2
     return 1
   fi

 }

 ################################################################################
 # To build WebView, we use the Android build system and build inside an Android
 # source tree. This method is called from non_sdk_build_init() and adds to the
 # settings specified there.
 #############################################################################
 webview_build_init() {
   # For the WebView build we always use the NDK and SDK in the Android tree,
   # and we don't touch ANDROID_TOOLCHAIN which is already set by Android.
   export ANDROID_NDK_ROOT=${ANDROID_BUILD_TOP}/prebuilts/ndk/8
   export ANDROID_SDK_ROOT=${ANDROID_BUILD_TOP}/prebuilts/sdk/\
 ${ANDROID_SDK_VERSION}

   common_vars_defines

   # We need to supply SDK paths relative to the top of the Android tree to make
   # sure the generated Android makefiles are portable, as they will be checked
   # into the Android tree.
   ANDROID_SDK=$(python -c \
       "import os.path; print os.path.relpath('${ANDROID_SDK_ROOT}', \
       '${ANDROID_BUILD_TOP}')")
   ANDROID_SDK_TOOLS=$(python -c \
       "import os.path; \
       print os.path.relpath('${ANDROID_SDK_ROOT}/../tools/linux', \
       '${ANDROID_BUILD_TOP}')")
   DEFINES+=" android_build_type=1"
   DEFINES+=" sdk_build=0"
   DEFINES+=" android_src=\$(GYP_ABS_ANDROID_TOP_DIR)"
   DEFINES+=" android_product_out=NOT_USED_ON_WEBVIEW"
   DEFINES+=" android_sdk=\$(GYP_ABS_ANDROID_TOP_DIR)/${ANDROID_SDK}"
   DEFINES+=" android_sdk_root=\$(GYP_ABS_ANDROID_TOP_DIR)/${ANDROID_SDK}"
   DEFINES+=" android_sdk_tools=\$(GYP_ABS_ANDROID_TOP_DIR)/${ANDROID_SDK_TOOLS}"
   DEFINES+=" android_sdk_version=${ANDROID_SDK_VERSION}"
   DEFINES+=" android_toolchain=${ANDROID_TOOLCHAIN}"
   export GYP_DEFINES="${DEFINES}"

   export GYP_GENERATORS="android"

   export GYP_GENERATOR_FLAGS="${GYP_GENERATOR_FLAGS} default_target=All"
   export GYP_GENERATOR_FLAGS="${GYP_GENERATOR_FLAGS} limit_to_target_all=1"
   export GYP_GENERATOR_FLAGS="${GYP_GENERATOR_FLAGS} auto_regeneration=0"

   export CHROMIUM_GYP_FILE="${CHROME_SRC}/android_webview/all_webview.gyp"
 }
	#!/bin/bash

	# Copyright (c) 2012 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.

	# Defines functions for envsetup.sh which sets up environment for building
	# Chromium on Android. The build can be either use the Android NDK/SDK or
	# android source tree. Each has a unique init function which calls functions
	# prefixed with "common_" that is common for both environment setups.

	################################################################################
	# Check to make sure the toolchain exists for the NDK version.
	################################################################################
	common_check_toolchain() {
	if [[ ! -d "${ANDROID_TOOLCHAIN}" ]]; then
	echo "Can not find Android toolchain in ${ANDROID_TOOLCHAIN}." >& 2
	echo "The NDK version might be wrong." >& 2
	return 1
	fi
	}

	################################################################################
	# Exports environment variables common to both sdk and non-sdk build (e.g. PATH)
	# based on CHROME_SRC and ANDROID_TOOLCHAIN, along with DEFINES for GYP_DEFINES.
	################################################################################
	common_vars_defines() {
	# Set toolchain path according to product architecture.
	case "${TARGET_ARCH}" in
	"arm")
	toolchain_arch="arm-linux-androideabi"
	;;
	"x86")
	toolchain_arch="x86"
	;;
	*)
	echo "TARGET_ARCH: ${TARGET_ARCH} is not supported." >& 2
	print_usage
	return 1
	;;
	esac

	toolchain_version="4.6"
	# We directly set the gcc_version since we know what we use, and it should
	# be set to xx instead of x.x. Refer the output of compiler_version.py.
	gcc_version="46"
	toolchain_target=$(basename \
	${ANDROID_NDK_ROOT}/toolchains/${toolchain_arch}-${toolchain_version})
	toolchain_path="${ANDROID_NDK_ROOT}/toolchains/${toolchain_target}"\
	"/prebuilt/${toolchain_dir}/bin/"

	# Set only if not already set.
	# Don't override ANDROID_TOOLCHAIN if set by Android configuration env.
	export ANDROID_TOOLCHAIN=${ANDROID_TOOLCHAIN:-${toolchain_path}}

	common_check_toolchain

	# Add Android SDK/NDK tools to system path.
	export PATH=$PATH:${ANDROID_NDK_ROOT}
	export PATH=$PATH:${ANDROID_SDK_ROOT}/tools
	export PATH=$PATH:${ANDROID_SDK_ROOT}/platform-tools

	# This must be set before ANDROID_TOOLCHAIN, so that clang could find the
	# gold linker.
	# TODO(michaelbai): Remove this path once the gold linker become the default
	# linker.
	export PATH=$PATH:${CHROME_SRC}/build/android/${toolchain_arch}-gold

	# Must have tools like arm-linux-androideabi-gcc on the path for ninja
	export PATH=$PATH:${ANDROID_TOOLCHAIN}

	# Add Chromium Android development scripts to system path.
	# Must be after CHROME_SRC is set.
	export PATH=$PATH:${CHROME_SRC}/build/android

	# TODO(beverloo): Remove these once all consumers updated to --strip-binary.
	export OBJCOPY=$(echo ${ANDROID_TOOLCHAIN}/*-objcopy)
	export STRIP=$(echo ${ANDROID_TOOLCHAIN}/*-strip)

	# The set of GYP_DEFINES to pass to gyp. Use 'readlink -e' on directories
	# to canonicalize them (remove double '/', remove trailing '/', etc).
	DEFINES="OS=android"
	DEFINES+=" host_os=${host_os}"
	DEFINES+=" gcc_version=${gcc_version}"

	if [[ -n "$CHROME_ANDROID_OFFICIAL_BUILD" ]]; then
	DEFINES+=" branding=Chrome"
	DEFINES+=" buildtype=Official"

	# These defines are used by various chrome build scripts to tag the binary's
	# version string as 'official' in linux builds (e.g. in
	# chrome/trunk/src/chrome/tools/build/version.py).
	export OFFICIAL_BUILD=1
	export CHROMIUM_BUILD="_google_chrome"
	export CHROME_BUILD_TYPE="_official"

	# Used by chrome_version_info_posix.cc to display the channel name.
	# Valid values: "unstable", "stable", "dev", "beta".
	export CHROME_VERSION_EXTRA="beta"
	fi

	# The order file specifies the order of symbols in the .text section of the
	# shared library, libchromeview.so. The file is an order list of section
	# names and the library is linked with option
	# --section-ordering-file=<orderfile>. The order file is updated by profiling
	# startup after compiling with the order_profiling=1 GYP_DEFINES flag.
	ORDER_DEFINES="order_text_section=${CHROME_SRC}/orderfiles/orderfile.out"

	# The following defines will affect ARM code generation of both C/C++ compiler
	# and V8 mksnapshot.
	case "${TARGET_ARCH}" in
	"arm")
	DEFINES+=" arm_neon=0 armv7=1 arm_thumb=1 arm_fpu=vfpv3-d16"
	DEFINES+=" arm_neon_optional=1" # Enable dynamic NEON support.
	DEFINES+=" ${ORDER_DEFINES}"
	DEFINES+=" target_arch=arm"
	;;
	"x86")
	# TODO(tedbo): The ia32 build fails on ffmpeg, so we disable it here.
	DEFINES+=" use_libffmpeg=0"

	host_arch=$(uname -m \| sed -e \
	's/i.86/ia32/;s/x86_64/x64/;s/amd64/x64/;s/arm.*/arm/;s/i86pc/ia32/')
	DEFINES+=" host_arch=${host_arch}"
	DEFINES+=" target_arch=ia32"
	;;
	*)
	echo "TARGET_ARCH: ${TARGET_ARCH} is not supported." >& 2
	print_usage
	return 1
	esac

	DEFINES+=" android_gdbserver=${ANDROID_NDK_ROOT}/prebuilt/\
	android-${TARGET_ARCH}/gdbserver/gdbserver"
	}


	################################################################################
	# Exports common GYP variables based on variable DEFINES and CHROME_SRC.
	################################################################################
	common_gyp_vars() {
	export GYP_DEFINES="${DEFINES}"

	# Set GYP_GENERATORS to make-android if it's currently unset or null.
	export GYP_GENERATORS="${GYP_GENERATORS:-make-android}"

	# Use our All target as the default
	export GYP_GENERATOR_FLAGS="${GYP_GENERATOR_FLAGS} default_target=All"

	# We want to use our version of "all" targets.
	export CHROMIUM_GYP_FILE="${CHROME_SRC}/build/all_android.gyp"
	}


	################################################################################
	# Prints out help message on usage.
	################################################################################
	print_usage() {
	echo "usage: ${0##*/} [--target-arch=value] [--help]" >& 2
	echo "--target-arch=value target CPU architecture (arm=default, x86)" >& 2
	echo "--try-32bit-host try building a 32-bit host architecture" >&2
	echo "--help this help" >& 2
	}

	################################################################################
	# Process command line options.
	# --target-arch= Specifices target CPU architecture. Currently supported
	# architectures are "arm" (default), and "x86".
	# --help Prints out help message.
	################################################################################
	process_options() {
	try_32bit_host_build=
	while [[ $1 ]]; do
	case "$1" in
	--target-arch=*)
	target_arch="$(echo "$1" \| sed 's/^[^=]*=//')"
	;;
	--try-32bit-host)
	try_32bit_host_build=true
	;;
	--help)
	print_usage
	return 1
	;;
	*)
	# Ignore other command line options
	echo "Unknown option: $1"
	;;
	esac
	shift
	done

	# Sets TARGET_ARCH. Defaults to arm if not specified.
	TARGET_ARCH=${target_arch:-arm}
	}

	################################################################################
	# Initializes environment variables for NDK/SDK build. Only Android NDK Revision
	# 7 on Linux or Mac is offically supported. To run this script, the system
	# environment ANDROID_NDK_ROOT must be set to Android NDK's root path. The
	# ANDROID_SDK_ROOT only needs to be set to override the default SDK which is in
	# the tree under $ROOT/src/third_party/android_tools/sdk.
	# To build Chromium for Android with NDK/SDK follow the steps below:
	# > export ANDROID_NDK_ROOT=<android ndk root>
	# > export ANDROID_SDK_ROOT=<android sdk root> # to override the default sdk
	# > . build/android/envsetup.sh
	# > make
	################################################################################
	sdk_build_init() {
	# If ANDROID_NDK_ROOT is set when envsetup is run, use the ndk pointed to by
	# the environment variable. Otherwise, use the default ndk from the tree.
	if [[ -z "${ANDROID_NDK_ROOT}" \|\| ! -d "${ANDROID_NDK_ROOT}" ]]; then
	export ANDROID_NDK_ROOT="${CHROME_SRC}/third_party/android_tools/ndk/"
	fi

	# If ANDROID_SDK_ROOT is set when envsetup is run, and if it has the
	# right SDK-compatible directory layout, use the sdk pointed to by the
	# environment variable. Otherwise, use the default sdk from the tree.
	local sdk_suffix=platforms/android-${ANDROID_SDK_VERSION}
	if [[ -z "${ANDROID_SDK_ROOT}" \|\| \
	! -d "${ANDROID_SDK_ROOT}/${sdk_suffix}" ]]; then
	export ANDROID_SDK_ROOT="${CHROME_SRC}/third_party/android_tools/sdk/"
	fi

	unset ANDROID_BUILD_TOP

	# Set default target.
	export TARGET_PRODUCT="${TARGET_PRODUCT:-trygon}"

	# Unset toolchain so that it can be set based on TARGET_PRODUCT.
	# This makes it easy to switch between architectures.
	unset ANDROID_TOOLCHAIN

	common_vars_defines

	DEFINES+=" sdk_build=1"

	# Sets android specific directories to NOT_SDK_COMPLIANT. This will allow
	# android_gyp to generate make files, but will cause errors when (and only
	# when) building targets that depend on these directories.
	DEFINES+=" android_src='NOT_SDK_COMPLIANT'"
	DEFINES+=" android_product_out=${CHROME_SRC}/out/android"
	DEFINES+=" android_lib='NOT_SDK_COMPLIANT'"
	DEFINES+=" android_static_lib='NOT_SDK_COMPLIANT'"
	DEFINES+=" android_sdk=${ANDROID_SDK_ROOT}/${sdk_suffix}"
	DEFINES+=" android_sdk_root=${ANDROID_SDK_ROOT}"
	DEFINES+=" android_sdk_tools=${ANDROID_SDK_ROOT}/platform-tools"
	DEFINES+=" android_sdk_version=${ANDROID_SDK_VERSION}"
	DEFINES+=" android_toolchain=${ANDROID_TOOLCHAIN}"

	common_gyp_vars

	if [[ -n "$CHROME_ANDROID_BUILD_WEBVIEW" ]]; then
	# Can not build WebView with NDK/SDK because it needs the Android build
	# system and build inside an Android source tree.
	echo "Can not build WebView with NDK/SDK. Requires android source tree." \
	>& 2
	echo "Try . build/android/envsetup.sh instead." >& 2
	return 1
	fi

	}

	################################################################################
	# To build WebView, we use the Android build system and build inside an Android
	# source tree. This method is called from non_sdk_build_init() and adds to the
	# settings specified there.
	#############################################################################
	webview_build_init() {
	# For the WebView build we always use the NDK and SDK in the Android tree,
	# and we don't touch ANDROID_TOOLCHAIN which is already set by Android.
	export ANDROID_NDK_ROOT=${ANDROID_BUILD_TOP}/prebuilts/ndk/8
	export ANDROID_SDK_ROOT=${ANDROID_BUILD_TOP}/prebuilts/sdk/\
	${ANDROID_SDK_VERSION}

	common_vars_defines

	# We need to supply SDK paths relative to the top of the Android tree to make
	# sure the generated Android makefiles are portable, as they will be checked
	# into the Android tree.
	ANDROID_SDK=$(python -c \
	"import os.path; print os.path.relpath('${ANDROID_SDK_ROOT}', \
	'${ANDROID_BUILD_TOP}')")
	ANDROID_SDK_TOOLS=$(python -c \
	"import os.path; \
	print os.path.relpath('${ANDROID_SDK_ROOT}/../tools/linux', \
	'${ANDROID_BUILD_TOP}')")
	DEFINES+=" android_build_type=1"
	DEFINES+=" sdk_build=0"
	DEFINES+=" android_src=\$(GYP_ABS_ANDROID_TOP_DIR)"
	DEFINES+=" android_product_out=NOT_USED_ON_WEBVIEW"
	DEFINES+=" android_sdk=\$(GYP_ABS_ANDROID_TOP_DIR)/${ANDROID_SDK}"
	DEFINES+=" android_sdk_root=\$(GYP_ABS_ANDROID_TOP_DIR)/${ANDROID_SDK}"
	DEFINES+=" android_sdk_tools=\$(GYP_ABS_ANDROID_TOP_DIR)/${ANDROID_SDK_TOOLS}"
	DEFINES+=" android_sdk_version=${ANDROID_SDK_VERSION}"
	DEFINES+=" android_toolchain=${ANDROID_TOOLCHAIN}"
	export GYP_DEFINES="${DEFINES}"

	export GYP_GENERATORS="android"

	export GYP_GENERATOR_FLAGS="${GYP_GENERATOR_FLAGS} default_target=All"
	export GYP_GENERATOR_FLAGS="${GYP_GENERATOR_FLAGS} limit_to_target_all=1"
	export GYP_GENERATOR_FLAGS="${GYP_GENERATOR_FLAGS} auto_regeneration=0"

	export CHROMIUM_GYP_FILE="${CHROME_SRC}/android_webview/all_webview.gyp"
	}