Rewrite Makefile rules for Android to allow parallel execution

tools/android-build.sh

-#!/bin/bash
-# Copyright 2012 the V8 project authors. All rights reserved.
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-#       notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-#       copyright notice, this list of conditions and the following
-#       disclaimer in the documentation and/or other materials provided
-#       with the distribution.
-#     * Neither the name of Google Inc. nor the names of its
-#       contributors may be used to endorse or promote products derived
-#       from this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-if [ ${#@} -lt 4 ] ; then
-  echo "$0: Error: needs 4 arguments."
-  exit 1
-fi
-
-ARCH=$1
-MODE=$2
-OUTDIR=$3
-GYPFLAGS=$4
-
-host_os=$(uname -s | sed -e 's/Linux/linux/;s/Darwin/mac/')
-
-case "${host_os}" in
-  "linux")
-    toolchain_dir="linux-x86"
-    ;;
-  "mac")
-    toolchain_dir="darwin-x86"
-    ;;
-  *)
-    echo "$0: Host platform ${host_os} is not supported" >& 2
-    exit 1
-esac
-
-case "${ARCH}" in
-  "android_arm")
-    DEFINES=" target_arch=arm v8_target_arch=arm android_target_arch=arm"
-    DEFINES+=" arm_neon=0 armv7=1"
-    toolchain_arch="arm-linux-androideabi-4.4.3"
-    ;;
-  "android_ia32")
-    DEFINES=" target_arch=ia32 v8_target_arch=ia32 android_target_arch=x86"
-    toolchain_arch="x86-4.4.3"
-    ;;
-  *)
-    echo "$0: Target architecture ${ARCH} is not supported." >& 2
-    echo "$0: Current supported architectures: android_arm|android_ia32." >& 2
-    exit 1
-esac
-
-toolchain_path="${ANDROID_NDK_ROOT}/toolchains/${toolchain_arch}/prebuilt/"
-ANDROID_TOOLCHAIN="${toolchain_path}/${toolchain_dir}/bin"
-if [ ! -d "${ANDROID_TOOLCHAIN}" ]; then
-  echo "$0: Cannot find Android toolchain in ${ANDROID_TOOLCHAIN}." >& 2
-  echo "$0: The NDK version might be wrong." >& 2
-  exit 1
-fi
-
-# For mksnapshot host generation.
-DEFINES+=" host_os=${host_os}"
-
-# The set of GYP_DEFINES to pass to gyp.
-export GYP_DEFINES="${DEFINES}"
-
-# Use the "android" flavor of the Makefile generator for both Linux and OS X.
-export GYP_GENERATORS=make-android
-export CC=${ANDROID_TOOLCHAIN}/*-gcc
-export CXX=${ANDROID_TOOLCHAIN}/*-g++
-build/gyp/gyp --generator-output="${OUTDIR}" build/all.gyp \
-              -Ibuild/standalone.gypi --depth=. -Ibuild/android.gypi \
-              -S.${ARCH} ${GYPFLAGS}
-
-export AR=${ANDROID_TOOLCHAIN}/*-ar
-export RANLIB=${ANDROID_TOOLCHAIN}/*-ranlib
-export LD=${ANDROID_TOOLCHAIN}/*-ld
-export LINK=${ANDROID_TOOLCHAIN}/*-g++
-export BUILDTYPE=$(echo ${MODE} | python -c "print raw_input().capitalize()")
-export builddir=${PWD}/${OUTDIR}/${ARCH}.${MODE}
-make -C "${OUTDIR}" -f Makefile.${ARCH}